Air Pollution Engineering Worksheet

Air Pollution Engineering Worksheet

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6 7 6 3 Scanned with CamScanner 6 7 6 3 Scanned with CamScanner 6 7 6 3 Scanned with CamScanner 6 7 6 3 Scanned with CamScanner 6 7 6 3 Scanned with CamScanner Slide ME 401/5501 Introduction to Air Pollution Set 1 Overview Donora, Pennsylvania 1948 For 5 straight days beginning in October 1948, a thick yellow blanket of smog darkened the valley. for five straight days. Twenty people died and half the town eventually became. See Class Folder for article Los Angeles Basin 1940s-50s Smog first appeared around 1940. Air pollution research began in earnest as California began to study its smog problem. Patchwork of Legislation prior to 1970 These slides make extensive use of APTI’s introductory course Patchwork of Legislation prior to 1970 These slides make extensive use of APTI’s introductory course Patchwork of Legislation prior to 1970 Patchwork of Legislation prior to 1970 These slides make extensive use of APTI’s introductory course 1970 – EPA established These slides make extensive use of APTI’s introductory course Basic structure EPA establishes NAAQS… 6 criteria pollutants Primary and secondary standards Basic structure … and states responsible to meet 6 criteria pollutants Measure, inventory, model, implement plans Amendments of 1977 New Source Review (NSR) Prevention of Significant Deterioration (PSD) Nonattainment provisions 1990 Amendments Acid rain, ozone depletion, 189 HAPs, power plant SOx/NOx, Title V Section 234 The following slides are taken from https://www.epa.gov/air-trends 1 True or False (See handout) 1 Comment on Example 1.1 and Problem 1.5 in textbook. Another “solution” proposed for Los Angeles was to dissipate the inversion layer by spraying water into it, evaporating the water and thus cooling the warm inversion layer to promote better vertical circulation. Estimate the amount of water (in gallons) required to cool a 500‐ft‐thick layer of air covering the 2400square-mile basin by 5.0 °F. 2 Briefly explain how (a) a pitot tube and (b) a rotameter work. 3 The 1-hr National Ambient Air Quality Standard for carbon monoxide is about 40 mg per cubic meter of air. How many gram-moles is 40 mg of CO? 2 Explain what’s meant by (a) primary and (b) secondary particulate. Which one do you think tends to be finer (smaller)? Why? What volume would 40 mg of CO occupy at 77 F and 14.7 psia? Use that volume by 1 cubic meter to approximate a CO concentration of 40 mg/m 3 in percent and parts per million. 3 Refer to problem 2.2 in the text. Assume a density of 2 grams per cubic centimeter. 4 Refer to problem 2.8 in the text. Do parts a) and b); in part c), differentiate to show that ΔLv / Lv = – Δc / c 5 This problem involves monitoring data that you’ll use at different times during the semester. Go to this website and select PM10, 1995-2005, Kansas City, MO-KS, and “all sites.” Once the plots are made, download the data as a CSV file (using the link at the bottom of the page). BE SURE TO SAVE THE FILE BECAUSE WE’LL USE IT THROUGHOUT THE SEMESTER. 6 This site contains historic ambient air quality standards for particulate matter (PM). What’s the difference between a “primary” and a “secondary” standard? Compared to the other criteria pollutants, PM has had major revisions to not only the numerical standards, but also in the basis (e.g., TSP, PM10, PM2.5) for the standard. Why do you think that’s the case? 7 Do problem 3.1 in the text. (I believe that the answer in the back of the book is incorrect.) 8 Refer to problem 3.2 in the text. What is the allowable emission factor in terms of lb/ton? 9 Suppose a power plant burns 3000 tons of coal per day, with the coal having an ash content of 4%. The split between bottom and fly ash is 30/70. The local regulatory agency has permitted the plant for a maximum PM emission rate of 2 g/s. What control efficiency is necessary? 4 Name at least 5 commonly used units of pressure. 5 If you took ME 451, how many particulate matter emission sources can you think of that would be present at a coal-fired power plant? If you didn’t take ME 451, take a guess as well. 6 Consider the complete combustion of propane (C3H8) to obtain CO2 and H2O. Write and balance the chemical equation. How much air do you need to completely combust 20 lb of propane? How much would the air weigh? Assume Types of Sources A “fugitive” source is one whose emissions do not pass through a stack, duct or vent Point sources are large, stationary sources release pollutants in quantities above an emission threshold. Area sources are facilities or activities whose individual emissions do not qualify them as point sources. Area sources represent numerous facilities or activities that individually release small amounts of a given pollutant, but collectively can release significant amounts of a pollutant. For example; dry cleaners, Mobile sources can be divided into onroad vehicles, which include automobiles, light trucks, heavy-duty trucks, buses, motorcycles and nonroad vehicles, such as airplanes, trains, combustion engines on farm and construction equipment, marine engines, and lawn mowers. In December 1952, an estimated 4000 people died in the worst smog disaster on record in London, primarily due to pneumonia, bronchitis, tuberculosis, and heart failure. Many who died were already compromised by chronic respiratory or cardiovascular complaints. Figure 2.6 in book ACUTE response Inhalation of PM in the atmosphere can lead directly or indirectly to diseases, including asthma, hay fever, increased respiratory symptoms, pulmonary inflammation, reduced lung function, and cardiovascular diseases. Figure 2.7 in book CHRONIC response 6 City Study Extinction (including scattering and absorption by particles) Visibility It is sometimes called Beer’s Law, the Bouguer-Lambert law, or Lambert’s law of absorption, due to confusion over attribution in scientific literature. Note that this can be used to measure concentration levels For particle diameter d >> λ, light is absorbed For particle diameter d ≅ λ, light is scattered For particle diameter d> λ, light is absorbed For particle diameter d ≅ λ, light is scattered For particle diameter d
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Femap Project Engineering Paper

Femap Project Engineering Paper

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AE-418 NASTRAN PROJECT NAME:_______________ GRADE:_________ Part 1: Create Finite Element Model A finite element model using FEMAP (NxNastran) of the problem stated below must be created. The *.modfem file must be uploaded into CANVAS at submission time along with the report. Part 1 of the report must include a detailed step by step procedure showing how to create the finite element model. Consider the finite element representation of a stiffened panel as shown below in Figure 1. Figure 1: Stiffened Plate Finite Element Representation The 20 x 20 inches plate is 0.1 inches thick and is clamped along all four edges. A uniform pressure equal to 0.5 psi is applied to the top of the plate. Because of the centroidal axes of the stiffeners does not coincide with the mid-plane of the plate, you will have to account for this when you define the element properties for the stiffeners. Dimensions for the I-shape stiffeners are given in Figure 2 Figure 2: General Dimensions, Boundary Conditions and Loading Based on the results of the finite element model you created provide the answers at the following loactions  Component of the displacement vector at the center of the plate: Disp X = Disp Y = Disp Z =  Axial on the stiffener at the center of the plate Axial Stress =  Plate von Mises stresses at the center of the plate (@-t/2) stress = (@-t/2) stress = Part 2: Analytical Approximation for Stiffened Plate By looking in the literature or online find an analytical approximation solution to the response (deformations and stresses) of a stiffened panel. Clearly describe the assumptions and equations you will be using to find the analytical solutions to:  Component of the displacement vector at the center of the plate: Disp X = Disp Y = Disp Z =  Axial on the stiffener at the center of the plate Axial Stress =  Plate von Mises stresses at the center of the plate (@-t/2) (@-t/2) stress = stress = Part 3: Compare Part 1 and Part 2 Compare Part 1 and Part 2 and comment on your findings and proposed procedure to improve agreement between numerical (finite element) and analytical solutions. NASTRAN PROJECT Stiffened Plate Structural Analysis Pol Fontdegloria Balaguer AE 418 Embry-Riddle Aeronautical University, Daytona Beach, FL, 32114-3900 June 24, 2022 Introduction This report presents (1) finite element, and (2) analytical solutions for the structure presented in the problem statement. The mentioned structure consists of a stiffened rectangular panel of thickness 0.1 inches and equal sides equal to 20 inches. Constraints are defined as simply supported along all four edges of the structure. The model will be analyzed for a uniform pressure equal to 0.5 psi applied downwards vertically to the top of the plate. It must be stated that the reference axis has been shifted from the problem statement. Whereas the problem statement defines thickness along the z-axis, the model presented in the report defines it along the y-axis. In the problem statement the stiffeners go along the x-axis, whereas in the model it is along the z-axis. More detailed information will be shown in the following report. Another point that must be mentioned, is that the results are expected to differ due to the assumptions taken in the analytical solution, specially for the stress calculations. 1 Finite Element Model This section of the report presents an explanation of the model building process in FEMAP. To start with, a material must be defined. In this case, the material chosen is Al-2024-T3, which is the most used material for aircraft panel structures. Based on the military handbook [1] the properties of this material are Young’s Modulus (E) 10.7e6 psi, and Poisons Ratio (v) equal to 0.3. Having defined these values in the Material section, the Properties can be defined. Two properties have been used for the model, one for the plate, and one for the stiffeners. Therefore, using the Material defined previously, defining the element type as Plate, setting the thickness as 0.1 inches and selecting OK, the plate property will be created. On the other hand, the stiffener property is defined choosing the same Material, defining, the element type as Beam, and clicking on Shape to define the following properties for the cross section as shown in Figure 1. Drop down menu Shape and select IBeam. Select Orientation Direction (y) to Up. Select OK, define Y Neutral Axis Offset to -1 in both squares and select OK again. At this point both properties have been created. Y Neutral Axis Offset will ensure the I-Beam is attached to the plate at the top edge. Figure 1. Cross-Section Definition of I-Beam Stiffener. The following step is to create the geometry, this is done by creating the edges of the panel. In this case, a 20 inches per side square panel. The points used to create this geometry are noted as coordinates in Table 1. Points are selected under Geometry > Point. 2 Point 1 2 3 4 5 6 7 8 9 10 x-coordinate -10 -5 0 5 10 -10 -5 0 5 10 z-coordinate -10 -10 -10 -10 -10 10 10 10 10 10 Table 1. Geometry Points for FEMAP Model. Once the reference points have been created, by going to Geometry > Surface > Corners, and selecting Method > On Point, the desired surfaces that will act as the panels can be created. For this model, four surfaces are created following Table 2. It is important to select points in the order indicated to maintain the same surface orientation. Surface 1 2 3 4 Points 6-7-2-1 7-8-3-2 8-9-4-3 9-10-5-4 Table 2. Surfaces and Respective Corners for FEMAP Model. Once the surfaces have been created, the following step is to mesh the geometry. First, the geometry mesh size must be defined. To do so select Mesh > Mesh Control > Size on Surface, then proceed to select the four surfaces previously created. For this model, the mesh size is defined to be equal to 1. At this point the model will look like shown in Figure 2. Figure 2. Pre-mesh View of FEMAP Model. 3 After the mesh size has been determined, meshing of the panels and stiffeners must be done. This is done with a similar process for both Properties. For the panels, selecting Mesh > Geometry > Surface > Select All > OK. After making sure the plate property is selected, proceed. The model should now look like Figure 3. Figure 3. FEMAP Model after Meshing of Plate. For the meshing of the stiffeners, Mesh > Geometry > Curve, and select the five curves that go along the z-axis. After ensuring the selected property is the I-Beam and selecting OK. The orientation vector must be set up in the y-axis. After this the model should look like Figure 4. Figure 4. FEMAP Model after Meshing of Stiffeners. After the meshing is complete, it is important to make sure there are no coincident nodes. To do so, select Tools > Check > Coincident Nodes. After that is checked, it is important to define the Constraints for the model. In this case, the problem states a simply supported structure along all four edges of the panel. This means that the constraints are going to be different for the curves along the x-axis and z-axis. The constraints are shown in Table 3, marking with an ‘x’ the constraints selected for each curve type in the model. 4 Curve along x-axis z-axis Tx x Ty x x Tz x Rx x Ry x x Rz x Table 3. Constraints (reactions) for Various Edges of the Panel. The constraints are added by selecting Model > Constraint > Curve, selecting the curves that must be constrained for each case, and selecting OK. Then, selecting Arbitrary in CSys, and switching the coordinate system to Global Rectangular. This will ensure that the constraints are being set in the same coordinate system as the rest of the model. Check the boxes to coincide with Table 3 and select OK. After all constraints, the model should look like Figure 5. Figure 5. FEMAP Model after Constraints. Once all constraints have been modeled, we can proceed with the application of the loads. To do so, it is important to deactivate the I-Beam property first, this will allow for an easier selection of the panel elements only. Once this has been done, select Model > Load > Elemental. Select the drop-down menu Pick and select on Box. Select all the elements of the plate, which should be a total of 400. Select OK. Input a value of -0.5 for the Pressure box and proceed. Select any of the elements on the plate and click OK. Reactivate the I-Beam property, and the model should look like Figure 6. Figure 6. FEMAP Model after Loads. 5 Proceed by ensuring that the model is properly built by selecting File > Rebuild. Then, for the analysis, select File > Analyze, create a new set by selecting Create/Edit Set. Following, select New and make sure that the analysis program is set to NASTRAN, and the analysis type is Static. Proceed by selecting OK, Select, and OK to run the simulation. The results for the simulation are summarized further in this report. Although, Figure 7 presents a graphical visualization of what the output for Total Translation with a 1% deformation model and Contour activated. For the model to look like shown below, it is important to deactivate the geometry surfaces modeled at the beginning of the process. Figure 7. Total Translation Output of FEMAP Model. Analytical Solution In this section of the report, an analytical solution to verify Nastran model. The equations shown in this section have been derived from Theory of Plates and Shells. [2] More in particular section 30 of the book, where relations for a simply supported rectangular plate under uniform loading are derived. To start with, let us define some parameters for our problem. Following, Figure 8 shows a two-dimensional representation of the problem as well as the system of reference that will be used during this solution. For the sake of consistency, the reference axis has been stablished equal to the ones used for the finite element model. Figure 8. Schematic of Plate with Reference Axis. 6 Where a and b represent the total distance on the x-direction and z-direction respectively. Similarly, w and l, represent the distance between stiffeners in x-direction and z-direction respectively. Note that there are no stiffeners in the z direction, thus b will be equal to l. The different variables presented in the schematic above are stated in the following Table 4. Other values such as the thickness (t) of the plate are also noted. Variable a [in] b [in] w [in] l [in] t [in] q [psi] Value 20 20 5 20 0.1 0.5 Table 4. Plate Variables for Analytical Solution. Once all the variables have been obtained, the analytical solution proceeds in the following way. To start with, the maximum deformation of this rectangular plate must be found. Based on the previously mentioned book this will be defined by equation 141, found in page 117: 𝑞𝑎4 𝑤𝑚𝑎𝑥 = 𝛼 𝐷 Equation 1 Where α represents a numerical factor depending on the ratio b/a of the sides of the plate, and D is the stiffness of the plate. As for this case, the ratio b/a is found to be equal to 1. Thus, based on the table 8 found on page 120 of the book, the value of α for our case is equal to 0.00406. This leads to the following equation: 𝑤𝑚𝑎𝑥 = 0.00406 𝑞𝑎4 𝐷 Equation 2 At this point, all the variables in Equation 2 but the stiffness D are known. Thus, this variable must be found prior to performing any calculations. To find this variable, components for D must be averaged as shown in Equation 3. 𝐷= 𝐷𝑥 + 𝐷𝑧 2 Equation 3 7 Starting with Dx for its simplicity, it is defined as shown in Equation 4. 𝐷𝑥 = 𝐸′𝐼 𝐸 1 𝑏𝑡 3 𝐸𝑡 3 = ∙ ∙ = 𝑏 1 − 𝑣 2 12 𝑏 12(1 − 𝑣 2 ) Equation 4 The value used for Young’s Modulus (E) and Poisons Ratio (v) are the same ones used in the finite element model, thus 10.7e6 psi and 0.3 respectively. Thus, plugging in the values for all known variables, we obtain a Dx equal to 979.85 lb·in. Once this value has been found, the following is to find the value for Dz. Because stiffeners are found along the z-direction this component of the stiffness will present an extra step of complexity. First thing is to find the y distance to the centroid of the combination between plate and stiffeners. This can be found using Equation 5, with 0 starting as shown in Figure 9. 𝑦̅𝑥 = 𝑁𝑥 ∙ 0.38 ∙ 1 𝑎𝑡 + 𝑁𝑥 ∙ 0.38 Equation 5 Figure 9. Schematic of Cell for Neutral Axis and Dx. Because the number of stiffeners in this case is 5, then the value for 𝑦̅𝑥 will be equal to 0.4871 inches. It must be mentioned that the value of 0.38 found in Equation 5 corresponds to the cross-sectional area of the stiffener. Due to the simplicity of the calculations to obtain this value, these have not been included in the report. Once the y distance for the neutral axis has been found, by using Equation 6, the equivalent stiffness Dz can be found. 𝐷𝑧 = 𝐷𝑧 𝑝𝑎𝑛𝑒𝑙 + 𝐷𝑧 𝑠𝑡𝑖𝑓𝑓𝑒𝑛𝑒𝑟 Equation 6 8 Where the equivalent stiffness in the z-axis is found by adding the equivalent stiffness provided by the panel, to the one provided by the stiffeners. Moreover, this mentioned equivalent stiffnesses can be found by using Equations 7. 𝐷𝑧 𝑝𝑎𝑛𝑒𝑙 = 𝐸 1 lb ∙ [ 𝑡 3 + 𝑡(𝑦̅𝑥 )2 ] = 280,054 2 (1 − 𝑣 ) 12 in Equation 7 (a) 𝐷𝑧 𝑠𝑡𝑖𝑓𝑓𝑒𝑛𝑒𝑟 = 𝐸 ∙ [ 𝑁𝑥 𝑒 𝑁𝑥 𝑐 lb ∙ ] ∙ [ 𝐼𝑥𝑥𝑠𝑡𝑖𝑓 + 0.38(1 − 𝑦̅𝑥 )2 ] = 1,231,975 2𝑤 𝑎 in Equation 8 (b) In Equation 7 (b), the value for the moment of inertia of the stiffener Ixx has been obtained from the cross section modeled previously in FEMAP. The value for this parameter is 0.229 in4. Values for Nx correspond to 2 and 3 for the edge and central stiffeners Leading for a total value Dz equal to 1,512,029 in/lb. With these values the value for equivalent stiffness can be found recalling Equation 3. This will result in an equivalent stiffness of D equal to 756,373 lb/in. Now that the value for equivalent stiffness has been found, by plugging in the known variables into Equation 1 the maximum displacement at the center of the panel can be obtained. This results in a value of wmax equal to 0.0004294 inches. Based on our model, this displacement will be found in the y-axis, thus will correspond to the y-displacement at the center of the plate. With the obtained value for equivalent stiffness D, we can proceed and obtain an equivalent thickness based on Equation 8. 3 𝑡𝑒𝑞 = √ 12𝐷(1 − 𝑣 2 ) 𝐸 Equation 9 Plugging in the values defined previously, the equivalent thickness obtained is equal to 0.9173 in. From now on, this value will be used to calculate the axial stress on the stiffener and the von Misses stress on the plate. To start with, the moment of x and z must be calculated. The moment of x on the edges of the constrained curves will be used to calculate the axial stress on the stiffener by simplifying to a pure 9 bending case in a two-dimensional situation. The equations for the bending moments at different positions of the plate can be found in the same book mentioned above. The equations are the following: (𝑀𝑥 ) = 𝛽𝑞𝑎2 | (𝑀𝑧 ) = 𝛽1 𝑞𝑎2 Equation 10 Timoshenko’s book presents multiple variations of these equations depending on the desired position in the plate. There is up to six variations of this equations, where the only parameter that changes is the value of the numerical variable β. As mentioned before, the first moment that we need is the moment of the x axis on the edge that goes along that same axis. Looking at tables attached in Theory of Plates and Shells the value of the numerical variable at that position is 0.0479. Therefore, the equation to obtain Mx of interest will show as follows: 𝑀𝑥 𝑥−𝑒𝑑𝑔𝑒 = 0.0479𝑞𝑎2 Equation 11 Plugging in the values for the known variables in Equation 11, we obtain a moment of the x-axis equal to 9.58 lb·in. As mentioned previously, this problem can now be reduced to a two-dimensional problem of pure bending for a beam, just as shown in Figure 10. Figure 10. FBD of 2-Dimensional Representation of Pure Bending in Beam. Based on the book Aerospace Structures I [3], the equation for axial stress in a beam due to pure bending is as follows. Furthermore, based on the values that have been found the derivation of this equation for our case is shown below. 𝜎𝑎𝑥𝑖𝑎𝑙 = 𝑀𝑥 𝑥−𝑒𝑑𝑔𝑒 ℎ 𝑀 𝑦= 𝐼 𝐼𝑥𝑥 2 Equation 12 10 Where h is the height of the I-beam defined previously in this report, and y is the distance from the point of interest to the neutral axis. Due to symmetry, the neutral axis is found at the center of the cross section. In this case, analyzing the top of the beam, the distance y will be equal half the height of the beam. By plugging in all the known variables, the axial stress at the edges of the beam will be equal to 41.834 psi. Finally, the problem statement requests to obtain the von Misses stress at the center of the plate. To do so, the first step is to obtain the principal stresses in the plate, as those stresses will be used in Equation 13 to obtain the von Misses stress as follows. 𝜎𝑣 = √𝜎12 − 𝜎1 𝜎2 + 𝜎22 Equation 13 These principal stresses can be found knowing the stresses in the x and z direction, as well as the shear stress. Because this problem is a plate, and to simplify this problem, the assumption taken is that it will not carry shear stresses, just like it has been done for most of the analytical solutions during this class. Knowing this, the principal stresses equation is simplified to the following two-dimensional case. 𝜎1 , 𝜎2 = 𝜎𝑥 + 𝜎𝑧 𝜎𝑥 − 𝜎𝑧 ± 2 2 Equation 14 Recalling to Timoshenko’s book, the x and z stresses can be found by combining the following sets of equations. 𝜎𝑥 = 𝐸𝑦 1 1 ( +𝑣 ) 2 1 − 𝑣 𝑟𝑥 𝑟𝑧 | 𝜎𝑧 = 𝐸𝑦 1 1 ( +𝑣 ) 2 1 − 𝑣 𝑟𝑧 𝑟𝑥 Equation 15 𝑀𝑥 = 𝐷 ( 1 1 +𝑣 ) 𝑟𝑥 𝑟𝑧 | 1 1 𝑀𝑧 = 𝐷 ( + 𝑣 ) 𝑟𝑧 𝑟𝑥 Equation 16 By combining Equation 15 and Equation 16, the following expression is obtained to find the x and z stresses as a function of the moment about the same axis and the equivalent stiffness found previously. Once again, y in these equations represents the vertical distance to the point of interest from the neutral axis. The equations are as shown below. 11 𝜎𝑥 = 𝐸𝑦 𝑀𝑥 1 − 𝑣2 𝐷 | 𝜎𝑧 = 𝐸𝑦 𝑀𝑧 1 − 𝑣2 𝐷 Equation 17 As mentioned previously, the calculations for the von Misses stress will be conducted using a new plate of equivalent thickness equal to 0.9173 inches. Furthermore, because the plate that is being analyzed has equal sides, the moments of x and z for it will be equal, therefore both equations above can be merged into a single equation. 𝜎𝑥 = 𝜎𝑧 = 𝐸𝑦 𝑀𝑐𝑒𝑛𝑡𝑒𝑟 1 − 𝑣2 𝐷 Equation 18 Furthermore, due to this relation between x and z stresses that equals them, Equation 13 simplifies to the following expression. 𝜎𝑣 = 𝐸 𝑀𝑐𝑒𝑛𝑡𝑒𝑟 𝑡𝑒𝑞 1 − 𝑣2 𝐷 2 Equation 19 Recalling Equation 10 and based on the value for β found on Theory of Plates and Shells equal to 0.0209. The value obtained for the moment about both axis at the center is 4.18 lb·in. Therefore, plugging all the known values into Equation 19, von Misses stress equals to 29.803 psi. 12 Results & Discussion In the previous sections, two different methods to analyze a simply supported stiffened plate model under a uniform pressure have been presented. Following, the results obtained through both methods are presented side by side and compared. Table 5 displays the results that have just been mentioned. x – displacement [in] y – displacement [in] z – displacement [in] stiffener axial stress top [psi] von Mises stress [psi] Finite Element Model 0 0.0003917 0 49.504 32.855 Analytical Solution 0 0.0004294 0 41.834 29.803 % Error 0 8.77 0 15.49 9.29 Table 5. Results for both Methods Starting by analyzing the different displacements, the only axis that results in a displacement is the y-axis. This is totally understandable as it is the only direction along which a load is applied. Also, due to the structure being symmetrical about the z-axis and x-axis, no displacement on the center of the plate will be experimented. Then, focusing on the results of the y-displacement, the Finite Element Model provides a result of 0.0003917 inches as shown in Figure 11, whereas the analytical solution ends up providing a solution of 0.0004294 inches for this same parameter. This translates in a percentage error of 8.77% with the analytical solution providing a larger deflection. In case of choosing one of the values, the analytical solution would provide a safer solution. Figure 11. Four Central Elements of Plate (Y-Displacement). Following, the second parameter requested by the problem statement s the axial stress on the stiffener situated at the center of the plate. The Finite Element Model results in a value of 49.504 psi as shown in Figure 12. On the other hand, the analytical solution provides a result of 41.834 psi, for a total percentage error of 15.49%, the largest error presented on this report. 13 Figure 12. Central Stiffener on the Plate (Axial Stress). Contrary to the previous case, the FEA model presents a larger value for axial stress, thus this is the value that must be chosen for safety purposes. As mentioned previously, this is the parameter with the largest percentage error. This is most likely since the analytical solution for the stiffener is a simplified twodimensional model that only accounts for the reactions of the plate on the edge of contact with the stiffener. If the stiffener is to be assumed to carry most of the load this is a reasonable assumption. However, it is important to account that the plate element has been neglected for this analysis. This reasoning would make more understandable this higher percentage error. The final parameter that has been analyzed in this report is the von Misses stress at the center of the plate. As shown in Figure 13 and Figure 14, the value for the FEA is 32.855 psi. If we recall the analytical solution, the result is slightly lower than that, being 29.803 psi, which leads to a percentage error of 9.29%. Figure 13. Full Plate (von Misses Stress). 14 Figure 14. Four Central Elements (von Misses Stress). As in the previous case, if we where to choose a value to proceed for our design, the chosen one would be the computational one, as it presents a larger value which will ensure a lower failing probability. In this case, the percentage error could come from the fact that we are using equations that have been derived for plates. Plates usually present a much lower thickness to width and length ratio. When the equivalent thickness method is used, the plate goes from having a thickness to width/length ratio of 0.005 to a 0.459, which represents an increase of over 900%. This could signify that the assumptions made for plates can not longer be applied, as there might be some shear flow that has not been accounted for. Conclusion When designing or analyzing a structure, it is usually faster and simpler to create a finite element model that will give you more detailed information of the overall performance. However, it is key to be able to support your computational solution with an analytical solution or hand calculations. Even if you make assumptions to be able to perform your analytical solution, it will still give you an overall vision of the problem and allow for verification of the FEA. On top of that, having two different methods that lead to a similar solution help you better understand the simplifications that analytical solutions require, and gives you a wider understanding of how the theoretical methods learned in the classroom must be applied in real life scenarios. Having two solutions derived from different methods also allows you to choose whichever one will give a higher safety factor. For this case, the analytical solution gave a safer solution when it came to displacements, whereas the computational method was the safer choice when it came to structure stresses, which would lead to ultimate failure of the structure. We can conclude then, that if our structure was to be constrained by space limitations, the analytical solution would be the ideal one, whereas if our structure was to be limited by the weight, like in most aerospace structures, the finite element model would be the proper solution. 15 References [1] U.S. Dept. of Defense. (1998). 3-71. Table 3.2.3.0 (b1). In Metallic materials and elements for aerospace vehicle structures. [2] Timošenko Stepan P., & Woinowsky-Krieger, S. (1996). Alternate Solution for Simply Supported and Uniformly Loaded Rectangular Plates. In Theory of plates and shells (pp. 113–124). essay, McGraw-Hill. [3] Radosta Frank, J. (2017). In Aerospace Structures I. essay, Embry-Riddle Aeronautical University, Aerospace Engineering Department. 16
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Biomedical instument Create Bioinstumentation Paper

Biomedical instument Create Bioinstumentation Paper

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Activity Tracker for Stroke Rehabilitation Device Kaelin Martin, Rafeal Cases Jr., Dr.Peter Lum, Department of Biomedical Engineering

The scientific methods consist of six steps, ask questions, do background research, hypothesis, conclusion, and result. This help organize the research and make it more accurate.

The poster is about (Could Stroke activity be tracked?)

Background is to design a device to monitor the hand movement by determining the numbers of flexion and extension (xyz), also measuring the duration of the procedure. This will give the clinics a better idea of the patient process.

This the device is used to track movement using the magnetic tracker to measure the proportional representation of the reordered field. It measures the xyz-plane

The hypothesis, this device uses Arduino to record magnetometer reading on SD card by converting the rotation of the metacarpophalangeal Joints (MCP) and proximal interphalangeal Joints.

Testing and data analysis using two magnometer to dismiss the Earth’s magnet field also, the algorithm rejects the changes of the magnet field at the sensor.

MATLAB have been used to collect data of the different angle positions. However, the accuracy of the magnet and sensor was compared to the potentiometer values.

The novel algorithm analyzes a full flexion and extension of the hand and at what speed.

In conclusion, the device has been able to measure the movement of the patient hand in the motion of the flexion and extension. Also, by using algorithm have been able to convert the data to the angle rotation.

Result, Each patient has its customized algorithm by altering angle change, peak height and distance parameters to record the majority of the movement. also marking the slow, fast and partial movement.

 

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Guidelines Design two complete, novel bioinstrumentation systems using biosignals that are relevant to an important health problem. Novel means not introduced in class and not able to be found on the internet. Each of your solutions should contain the following elements: 1) a labeled block diagram of a full instrument to acquire the signal, process it, and convert to a measurand. 2) block diagram must include a sensor, sensor circuit, processing circuitry (active and/or passive), and output (digital, analog, LED, alarm, etc.). 3) state a reason for each choice of bioinstrumentation element. 4) define signal range, instrument resolution, sensor sensitivity. 5) state guidelines for detecting healthy vs. unhealthy levels of the biosignal. How should a clinician interpret the measurand? 6) what modifications would be needed to make this a senior design project? What is the ideal team (student expertise? Faculty expertise? Experts outside the university)? Answers should be submitted in one clearly labeled word document, with your name and student ID, a title for each instrument, and responses to questions 1) through 6) clearly marked as such. The rubric below will be used to grade: Points given 0 1 2 3 1) No block diagram. Two or more blocks/labels are missing. One block is missing. Block diagram is complete. 2) No labels or only very generic labels of components. Lack of detail. Two errors or omissions prevent strong and clear signal from flowing from biosignal to measurand to output. One error or omission in specific components prevents strong and clear signal from flowing from biosignal to measurand to output. Instrument components work together, signal flows correctly. 3) No rationale provided or only very general and generic information provided. Three or four mistakes in the justification of use of instrumentation components One or two mistakes in the justification of use of instrumentation components. Each instrumentation component is well explained. Element # 4) No equations are provided, and no characteristics are given justifiable numeric values. Two characteristics and/or two equations to describe them are missing. One of the three characteristics is missing. One equation is missing. Range, resolution, and sensor sensitivity are defined and correct. Equations are given. 5) No ranges of values discussed, and false readings not discussed. Healthy and unhealthy ranges are provided but with no explanation. False readings mentioned but with limited explanation. Healthy and unhealthy ranges of output are defined. No discussion of errors (false readings), or only very general discussion without details. Healthy and unhealthy ranges of output are defined. The rates of false positives and false negatives are estimated, justified, and ways to reduce them are discussed. 6) Omitted. No discussion of resources and timeline, only general features of team discussed. Some efforts made to translate to senior design, but team members are not discussed in detail. Translation to senior design project (limited time and funds) is discussed. Essential features of the best team of students and faculty + outsiders is discussed. Guidelines Design two complete, novel bioinstrumentation systems using biosignals that are relevant to an important health problem. Novel means not introduced in class and not able to be found on the internet. Each of your solutions should contain the following elements: 1) a labeled block diagram of a full instrument to acquire the signal, process it, and convert to a measurand. 2) block diagram must include a sensor, sensor circuit, processing circuitry (active and/or passive), and output (digital, analog, LED, alarm, etc.). 3) state a reason for each choice of bioinstrumentation element. 4) define signal range, instrument resolution, sensor sensitivity. 5) state guidelines for detecting healthy vs. unhealthy levels of the biosignal. How should a clinician interpret the measurand? 6) what modifications would be needed to make this a senior design project? What is the ideal team (student expertise? Faculty expertise? Experts outside the university)? Answers should be submitted in one clearly labeled word document, with your name and student ID, a title for each instrument, and responses to questions 1) through 6) clearly marked as such. The rubric below will be used to grade: Points given 0 1 2 3 1) No block diagram. Two or more blocks/labels are missing. One block is missing. Block diagram is complete. 2) No labels or only very generic labels of components. Lack of detail. Two errors or omissions prevent strong and clear signal from flowing from biosignal to measurand to output. One error or omission in specific components prevents strong and clear signal from flowing from biosignal to measurand to output. Instrument components work together, signal flows correctly. 3) No rationale provided or only very general and generic information provided. Three or four mistakes in the justification of use of instrumentation components One or two mistakes in the justification of use of instrumentation components. Each instrumentation component is well explained. Element # 4) No equations are provided, and no characteristics are given justifiable numeric values. Two characteristics and/or two equations to describe them are missing. One of the three characteristics is missing. One equation is missing. Range, resolution, and sensor sensitivity are defined and correct. Equations are given. 5) No ranges of values discussed, and false readings not discussed. Healthy and unhealthy ranges are provided but with no explanation. False readings mentioned but with limited explanation. Healthy and unhealthy ranges of output are defined. No discussion of errors (false readings), or only very general discussion without details. Healthy and unhealthy ranges of output are defined. The rates of false positives and false negatives are estimated, justified, and ways to reduce them are discussed. 6) Omitted. No discussion of resources and timeline, only general features of team discussed. Some efforts made to translate to senior design, but team members are not discussed in detail. Translation to senior design project (limited time and funds) is discussed. Essential features of the best team of students and faculty + outsiders is discussed. Bioinstrumentation— Sensors and Actuators Definitions Transducer: a device which accepts energy of one form as an input, converts it to another form and transmits it as an output Sensor: accepts physical parameter as input, and converts it to an electrical signal -also called an input transducer -resistive -inductive -capacitive -piezoelectric Actuator: accepts electrical signal as input, and converts it to a mechanical output -output transducer -examples: valves, solenoids, pumps, motors Signal Conditioning—Conceptual Sensor Output (S) Mod Desired Output (D) D = (S-N)/Mod Noise(N) Measurand (M) Measurand (M) Measurand (M) Measurand (M) The Wheatstone Bridge Vi – i1R4 – i1R3 = 0 (1) KVL Vi – i2R2 – i2R1 = 0 (2) KVL V0 + i1R4 – i2R2 = 0 (3) KVL V0 – i1R3 + i2R1 = 0 (4) KVL i2 = (V0 + i1R4)/R2 (5) (3) rearranged Vi/(R1 + R2) = (V0 + i1R4)/R2 (6) (2) rearr. subst. into (5) Vi/(R1 + R2) = V0 /R2+ Vi R4/R2(R3 + R4) (7) (1) rearr. subst. into (6) V0 = Vi [R2/(R1 + R2) – R4/(R3 + R4)] (8) (R2 times (7), rearr.) R1/R2 = R3/R4 (9) (V0 = 0) The Resistive Temperature Detector • • • • Low sensitivity (dR/dT) High thermal inertia Susceptible to mechanical damage Resistance in the leads creates error WIRE RTD For a Platinum RTD: α1 = 3.96 x 10-3 (°C-1) α2 = -5.85 x 10-7 (°C-2) Range = 0 – 200 °C Ro = 100 Ω housing leads connectors glass Pt ceramic What is the sensitivity at 0 and 200°C? What is the resistance at 100 and 200°C? Use: RT = Ro (1 + α1T + α2T2 + …) Derive dR/dT THIN FILM RTD Resistive Temperature Detector: Solution An RTD is nonlinear… RT (Ω) RT (Ω) 1000 …but approx. linear over usable range 500 200 100 0 0 0 2000 4000 0 dRT/dT T (°C) 0.3961 0.396 0.3959 0.3958 0.3957 100 T (°C) What is the sensitivity at 0 and 200°C? What is the resistance at 100 and 200°C? 0 100 200 T (°C) dR/dT(0) = 0.396 Ω/°C dR/dT(200) = 0.3957 Ω/°C R(100) = 139 Ω R(200) = 177 Ω 200 RTD Instrumentation Circuit THREE LEAD COMPENSATION R Vi R • Rt is low, so contact resistance from the wires can interfere with the measurement. • Therefore, compensation with three leads introduced into the bridge circuit • At balance, L3 current = 0, and voltage drops through L1 and L2 are equal. • (R+L2)/(Rt+L1) = constant • The Sensitivity is ~ 1 mV/°C V0 = Vi [(R+L2)/(R+Rt+L1+L2) – R/(R + R)] R Vi R Assume L1 = L2 = L, L3 = 0 V0 = Vi [(R+L)/(2L+R+Rt) – R/(R + R)] V0 = Vi [(R+L)/(2L+R+Rt) – 1/2] (voltage dividing principle across the left side) (rearrange terms) Rt = R[(Vi – 2V0)/(Vi + 2V0)] – L [(4V0)/(Vi + 2V0)] Error term due to lead resistance -accounted for in the calibration Thermistors • • • • • • A thermally-sensitive semiconductor resistor Small size Low thermal inertia Nonlinear -30 to 200 °C Sensitivity of ~4%/°C RT = A exp(B/T) Derive dR/dT 1) Raise T 2) Increases # of active charge carriers by promotion into the conduction band 3) Conduction band ~ current 4) Higher current ~ lower resistance N-type: Fe2O3 doped with Ti P-type: NiO doped with Li Thermistor R vs. T and Sensitivity RT (Ω) 600 400 200 0 0 100 T (°C) 200 T (K) 300 -16030 -16040 dRT/dT -100 -16050 -16060 -16070 0 200 400 600 Thermistor Instrumentation Circuit Amplified voltage divider Bridge circuit See worked out example of a thermistor used in a bridge circuit The thermistor is nonlinear because the resistance-temperature curve is a decaying exponential Thermocouple • • • • • • Passive device that generates a voltage difference that varies with temperature Very small, inexpensive, rugged Low thermal inertia High sensitivity (5-80 µV/°C) Reference point is required nonlinear Contact Potential: When two dissimilar metals contact, a contact potential develops and drives electric charge from one metal to the other 𝛻V = -S(T)𝛻T S = Seebeck coefficient Seebeck or Thermoelectric Effect: Current flowing in a loop consisting of two metals, caused by temperature differences between the two junctions. Thermocouple Instrumentation Circuit • The reference junction could be placed in an ice-bath • This is known as a cold junction thermocouple 𝑇 • V= ‫𝑙𝑎𝑡𝑒𝑚𝑆(𝑒𝑠𝑛𝑒𝑠 𝑇׬‬1 (𝑇) − 𝑆𝑚𝑒𝑡𝑎𝑙2 (𝑇)) 𝑑𝑇hard to solve for 𝑟𝑒𝑓 each temperature • V = E(Tsense) – E(Tref)evaluate characteristic functions E, at two temperatures. • E(Tsense) = V + E(Tref)V is measured, Tref is set, so E(Tref) is known. Tsense is found from a look-up table of E(Tsense) • The above circuit is for a reference junction compensated thermocouple: E’s are voltages, Tref is reference temperature, Tsense is the temperature to measure Thermocouples are nonlinear, but can be approximately linear over a restricted range RTD vs. Thermistor vs. Thermocouple RTD Thermistor Thermocouple Material Metal (Pt) Ceramic metal oxide Dissimilar metal (Ni, Chromium, Rhodium, Constantan, Iron) Useful range 0-200 °C -50-130 °C -270-1260 °C Sensing principle ρ(T), so R(T) Charge carriers (T) -Ohm’s Law Thermoelectric (Seebeck) effect sensitivity quasilinear (quadratic) Nonlinear (exponential) ~linear (polynomial) thermistor R RTD TC T V Thermocouples are very versatile Bioinstrumentation— Sensors and Actuators Sensors and Actuators— Summary of Part 1 • Sensors behavior is governed by the ruling equations describing the physical principle of measurement • Sensors may be linear (y=Ax) or nonlinear (y = b0 + Ax + b1x2 + b2x3+…) • Sensor sensitivity S = Δ electric parameter / Δ physical parameter • This can be local at a specific input value x, and is the partial derivative of the electrical parameter with respect to x • DON’T confuse the sensitivity of a sensor with that of a sensor + circuit. They are two different numbers. • Sensor nonlinearity δ = nonlinear terms / linear terms • This can be local at a specific x, or global (determine x that maximizes nonlinear factor) Thermistor: RT = A exp(B/T) -semiconductor RTD: RT = Ro (1 + α1T + α2T2) -Pt wire or film -R = ρL/A Thermocouple: V=α(T1-T2) -dissimilar metals -Seebeck effect If the Wheatstone bridge resistor labels get confusing… 1) Draw the currents in the right directions. 2) KCL, 3) Ohm’s law, 4) use voltage divider equation twice to go halfway across the bridge, 5) subtract terms to get V0, 6) normalize by Vi Vi Vi Vi V0 V0 Vi V0 Temperature sensing during cardiac ablation to treat ahrhythmias Live Surgical Demonstration of Cardiac Ablation A surgeon’s testimonial of a multi-thermistor device Resistive Strain Gauges • • • • • A resistive material (fine wire or metal foil) is placed on a flexible backing The backing is placed on the object from which strain is to be measured Forces that stretch or contract the wire along the long axis change the resistance (Figure) A bridge circuit converts ΔR into ΔV, and amplifiers make the signal larger Force→strain→ ΔR→ ΔV (V versus force turns out to be approximately linear) • Note: 1 strain gauge = 1 axis strain and pressure; 2 perpendicular gauges = 2 axes; 4 in a square = 2-axis measurement with temperature compensation • See Class Notes for Derivation of gauge factor and use of the strain gauge in a circuit. Semiconductor Strain Gauges When energy is input to a semiconductor, its resistance eventually decreases because the added energy promotes charge carriers to a level that allows more charge to flow (current) In a metal wire, input of energy causes free charges to collide more often (more kinetic energy), thus eventually causing increased resistance and a barrier to increased current conductor semiconductor I I V V -V = reverse bias Self-heating +V = forward bias • High gauge factor K • Piezoresistive effect • Nonlinear S Semiconductor Transducers—General Semiconductor: has electrical properties in between conductors and insulators -silicon -gallium arsenide -germanium -cadmium sulphide n-type semiconductors: doped with impurities to have an excess of electrons p-type semiconductors: doped to have reduced electrons I=I0[exp(qV/kT)-1] I V I0 is the leak current A Semiconductor Pressure Sensor— Designed by Biomedical Engineers Semiconductors are not flexible—hard to make them Strain Gauges are Diverse! Additional Uses of Strain Gauges • Flow monitoring in medical pumps • Insulin • Medical weighing • Biomechanics research • Medical imaging instruments Capacitive Transducers C = ε0εairA/x (1) definition of capacitance dC = -(ε0εairA/x2 )dx (2) d/dx of (1) dC/C = -dx/x (3) plug (1) into (2) Capacitive Pressure Transducers De Sauty Bridge: 2 resistors + 2 capacitors Vi = V0[Ct/(Ct+C1) – R1/(R1+R2)] Ct/C1 = R2/R1 (at balance, V0=0) Piezoelectric Transducers The Piezoelectric effect: certain crystals, when deformed, generate an electrical charge -quartz -lithium sulfate – barium titanate • Frequency response depends on the RC time constant Pressure and Vibration Sensing V = SV*P*D SV is the voltage sensitivity (V*m/N) P is pressure (N/m2) D = transducer thickness – + [charge/force] Compare to V = SV*P*D SV = k/ε0εr Photodiodes Photodiodes types are application-specific Range: 1 pW/cm2 – 100 mW/cm2 Uses: spectroscopy, imaging (near infrared, visible, near UV), position sensing, laser profilometry, pulse oximetry. Photodiode Types: P/N PIN avalanche Photodiodes are semiconductor junctions bandgap Conduction band: +1.12 eV Charge carriers~T Charge carriers~ hν100 Bioinstrumentation— Op-Amps and Integrated Circuits A timer circuit is an integrated circuit that controls square wave duty cycle +5V 555 1 Ground Vcc 8 2 Trigger Discharge 7 3 Output Threshold 6 Control 5 4 Reset RA RB 8 Ra 7 3 Rb (a) Th = -ln(0.5)(R +Rln 𝑇𝐻 = a− b)C 0.5 𝑅𝐴 + 𝑅𝐵 𝐶 4 6 2 C 5 1 C 5V 0V (b) 𝑇𝐿 =T− ln 0.5 𝑅𝐵 𝐶 l = -ln(0.5)RbC (c) Duty cycle=DC=TH/(TH+TL) Figure 2.41 The 555 timer (a) Pinout for the 555 timer IC. (b) A popular circuit that utilizes a 555 timer and four external components creates a square wave with duty cycle > 50%. (c) The output from the 555 timer circuit shown in (b). 555 Timer Integrated Circuit Uses • Timing • Pulse Generation • Oscillator • Pulse width modulation • Frequency divider • Pulse generator • Logic clock • Tone generation • Simple ADC • Temperature sensing (if connected to thermistor) Composition • 25 transistors • 2 diodes • 15 resistors • Silicon chip Pins • 1 GND = ground • 2 TRIG = OUT pin goes high and timing interval starts when input falls below 1/3 Vcc • 3 OUT = output voltage signal • 4 RESET = resets the timing interval when switched transiently to ground • 5 CTRL = control access to the internal voltage divider (2/3 Vcc by default) • 6 THR = the timing interval ends when the voltage at THR is greater than 2/3 Vcc/CTRL • 7 DIS = open collector output from a transistor, may discharge a capacitor between intervals • 8 VCC = positive supply voltage Digital to Analog Converter: (3-bit) Input versus (voltage) Output 7/8 Vref Analog output 6/8 Vref 5/8 Vref 4/8 Vref 3/8 Vref resolution = 2/8 Vref 1 2 1/8 Vref n Vref 0V 000 001 010 011 100 101 110 111 Figure 2.42 The ideal static behavior of a 3-bit DAC. For each digital string, there is a unique analog output. Digital to Analog Converter— Circuit 1. The digital input is b2, b1, b0 2. Digital input controls switches through the 3-8 decoder 3. Switches control a voltage divider such that voltage is divided by: 4. Resolution = Vref/2n n is the bit-depth (3 in this example—the 3 bits are b2, b1, b0 b2 Vref R R R b1 b0 3-to 8 decoder 7 6 5 4 3 2 1 0 7/8 Vref 6/8 Vref Vo R R R 1/8 Vref 0 R R Figure 2.43 A 3-bit voltage scaling DAC converter. “Switch” closure vs. Vo of a DAC 0 X X X X O O O O 1 O O O O X O O O 2 O O O O O X O O 3 O O O O O O X O 4 O O O X X X X O 5 O O X O O O O O 6 O X O O O O O O 7 X O O O O O O O Vo 7/8 6/8 5/8 4/8 3/8 2/8 1/8 0 -0 is closest to ground; 7 is closest to Vref, as in slide 6 -Vo is a fraction of Vref Analog to Digital Converter: (Voltage) Input versus (3-bit) Output 111 110 Digital output 101 100 011 010 001 000 0/8 1/8 2/8 3/8 4/8 5/8 6/8 7/8 Vref Figure 2.44 Converting characteristic of 3-bit ADC converter. Analog to Digital Converter: Circuit Example Comparator: Compares two voltages, produces positive or negative square wave Vin 2. 0.5Vref Either < or > Than Vin Clock Clock + _ Digital control logic 3. “1” decrement “0” increment 1. V=0.5Vref Digital output DAC converter Figure 2.45 Block diagram of a typical successive approximation ADC. 1. 2. 3. 4. The loop starts with V = 0.5Vref (this is binary 100) V is compared to Vin If >, then the first bit = 1. If
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1 Paper

Aircraft Design and Maintenance Case Study

Aircraft Design and Maintenance Case Study

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Your case study is due at the end of the module week.

Research two aircraft that are notably different. Compare and contrast cost, performance, design, material selection, and maintenance requirements. Estimate variables (e.g. cost) which aren’t readily available. Where estimates are used, justify your thought process.

For one of the aircraft, discuss three design features and associated tradeoffs (performance and/or structural) engineers likely contemplated. For one of the tradeoffs, outline the pros and cons of the decision.

Within your report, discuss the relationship between aerodynamic performance and structural design and how each influences one another.

For one of the aircraft, estimate the maximum normal bending stress at the wing-fuselage interface using the following simplifying assumptions:

There exists a primary spar carrying the bending load.

The spar can be modeled as an “I-beam.”

  1. Estimate a reasonable spar size (length, depth, height) and material.
  2. Note: You will need to look up the Modulus of Elasticity (“E”) based upon your pick of the material you chose for your spar.
  3. The “Second Moment of Area” (I) from our stress equation, Stress = My/I, can be determined similar to the following image, Figure 1.
    Depiction of solving stress equation for I-Beam. Detailed alt text available in document right after the image.
    Figure 1. Stress equation for I-beam.
    Please view detailed alt text for Figure 1. Stress equation for I-beam (DOCX).Preview the document

The only force acting on the wing is gravity (weight).

  1. The weight of the wing is distributed evenly across its length.

Based upon the spar material you selected, calculate the wing spar Factor of Safety. Also, estimate the maximum wingtip deflection(?max) based upon the case of a “Cantilever Beam with a Uniformly Distributed load”as shown in these slides of Cantilever Beam equations images (PPTX).Preview the document

  1. Within your report, show all calculations in an appendix, discuss the findings, and comment on the reasonableness of the simplifying assumptions.

 

Explanation & Answer:

1000 words

Article About Transdermal Patches Discussion

Article About Transdermal Patches Discussion

Description

 

 

Okay well you have to pick an engineering journal article that you can find using the library databases about anything having to do with bio transport. for example, article about transdermal patches, thinks like contact lenses. Things like that. I’m sure if you looked up cellular transport you’ll find something. Once you find the article you need to write a review paper on it talking about the background, study, what they did, results, and then say what was good and bad about the article and review it. He says the paper should be less than 7pages.

use this database for looking to article before u pick it let me know what is first that I can look at and five u access to article

http://eds.a.ebscohost.com/eds/results?vid=0&sid=3…

 

Explanation & Answer:

1 Discussion

ACI Only Permits Tension Controlled Failure Modes in Columns Worksheet

ACI Only Permits Tension Controlled Failure Modes in Columns Worksheet

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CE 334 – Week 14 Columns Homework Quiz Name:________________ 1. True or false: ACI only permits tension-controlled failure modes in columns. 2. What is the φ factor for a spiral column? 3. Name the 4 principles used to calculate the strength of a column. 4. How do the equilibrium equations for a column have to be adjusted compared to the equilibrium equations for a beam? 5. In addition to axial load and the primary bending moments from the applied loads, what other effect must long (slender) columns be designed for? 6. How does ACI classify a column as long or short? 7. In a short column, what factors control the maximum load supported? 8. Describe what causes the secondary P-Δ moment in a long column. CE 334 – Week 14 Columns Homework Quiz Name:________________ 9. Name three types of columns. 10. Describe a composite column. 11. True or false: ties increase the strength of a column. 12. Are tied or spiral columns better for earthquake-prone areas? 13. Why is the failure mode of a spiral column more ductile than the failure mode of a tied column? 14. What is the equation for axial load capacity of a reinforced column? 15. Why is the capacity reduction factor φ smaller for a column than for a beam? 16. Why does the ACI Code limit the design capacity of an axially loaded column to 80 or 85 percent of its actual strength? 17. What are the maximum and minimum percentages of steel that ACI permits a column to be reinforced with? CE 334 – Week 14 Columns Homework Quiz Name:________________ 18. From a practical standpoint, what is the minimum possible column dimension? 19. What is the smallest size tie permitted by the ACI Code for the column shown? What would be the required spacing of those ties? 20. True or false: the confining effect of spiral reinforcement causes the concrete compressive strength to increase. 21. Define plastic centroid. 22. When is the column capacity reached (i.e. when does failure occur)? 23. True or false: Columns with axial load plus bending moment can have one side of the column cross section in tension and one side in compression. CE 334 – Week 14 Columns Homework Quiz Name:________________ 24. True or false: Columns with axial load plus bending moment can have all of the column cross section in compression. 25. What is an interaction diagram?
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1 Worksheet

The Volkswagen Emission Scandal Questions

The Volkswagen Emission Scandal Questions

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watch this video and answer the following questions. Volkswagen emissions scandal: A timeline (Links to an external site.)

Provide a one-paragraph summary of the incident that addresses the following questions:

  • What is the title of the incident?
  • What was the incident?
  • What were the causes?
  • Who were at fault for the causes?
  • What were the effects?
  • Who were affected?
  • Q2:From the Code of Engineering Ethics, pick one principle or canon that engineers violated. Discuss the evidence that this violation occurred and what caused it. (You may need to infer some of the engineers’ actions or failures to act from the case.)

Q3:Who were the decision-makers? What was their relationship to the engineers? Were the decision-makers acting ethically? Were they honoring the engineers’ ethical judgments? Explain.

Q4:If you were an engineer on this project, what would you do to satisfy the Engineering Code of Ethics?

 

Explanation & Answer:

4 Questions

Wooden Beams Writing Report Paper

Wooden Beams Writing Report Paper

Description

 

 

IN THIS LAB WE TESTED TO WOODEN BEAMS. ONE OF THE WOODEN BEAM WAS FLAT WHEN WE TESTED IT, BUT THE SECOND ONE WAS UPRIGHT WHEN WE TESTED IT. I HAVE UPLOADED THE EQUATIONS FOR THE CALCULATIONS FOR BOTH BEAMS AND THE FORMAT THAT YOU NEED TO FOLLOW ON WRITING THIS LAB SUMMRY AND THE LAB MANUAL WAS UPLOADED AS WELL. WHEN U WRITE THE SUMMEY NO HEADINGS EVERYTHING HAVE TO BE AS A PARAGRAPH. AND THERE ARE 2 GRAPHS U NEED FOR EACH BEAM.

RUSELT :

– FLAT BEAM INFO AND RESULT:

WIDTH = 3.5 IN

HIGHET = 1.5 IN

LONG SPLIT AFTER THE TEST.

ULTIMATE FORCE = 1120 Ibf

FORCE (Ibf) POSITION ( IN) TIMME (SEC) STRAIN (%)

1120 1.23 54 7.68

– UPRIGHT BEAM INFO AND RESULET :

WIDTH = 3.5 IN

HIGHET = 1.5 IN

SPLIT AFTER TEST

ULTIMATE FORCE = 2840 Ibf

FORCE (Ibf) POSITION (IN) TIME (SEC) STRAIN (%)

2840 0.879 45.4 12.8

 

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– EXECUTIVE SUMMARY FORMAT The executive summary is a standalone section in a formal report that provides a shortened version of the report and summarizes the key facts and conclusions contained in the report. Sometimes the executive summary is filed separately from the formal report. We will be using a modified form of the executive summary as the report you will turn in for some of the experiments we do this semester. Which experiments require full lab reports and which require executive summaries is shown on the syllabus. Your executive summaries will be “modified” in that you must provide a full discussion of the results and also include an appendix with all data sheets and appropriate calculations. Your executive summary will be similar to the requirements for the lab reports but will leave out the abstract, table of contents, background, and methods and procedures sections from the report. Your executive summary should NOT contain separate sections as is done in the lab report. Instead, it should be written in paragraph format with each section starting in a new paragraph. The executive summary shall contain: a. Title Page b. Background Statement: The background statement (also called the context) connects the lab to real world applications to show you understand the problem and its relevance from an engineering perspective. c. Objectives: A statement of what you are trying to accomplish. Similar to the objectives in a lab report, this section should only contain the technical objectives. d. Scope of Work: A brief description of what you were required to do in the lab. Include general processes but not the details. For example, you should state that strain gage data was collected but you don’t need to provide details about where the strain gages were located or how the data was collected. e. Results and Discussion: This is where you introduce, present and describe the results you obtained in the laboratory. Summarize the data collected and the analysis that is done with that data, giving sufficient detail to justify your conclusions. As in the Results and Discussion section of the full laboratory report, tables and graphs are to be used where necessary to present your data, calculations, and results. Remember that discussion must be provided to describe and explain the data and the significance of the information in the tables and graphs. The purpose of the discussion is to interpret and compare the results. Point out the features and limitation of your work and relate your results to the technical objectives of the lab. Compare your results with theory or accepted formulas and discuss the comparison. Sources of error should be discussed with respect to your findings and the significance of the errors with respect to the objectives of the lab. The Results and Discussion section will follow the same format that was used in the lab report format. f. Conclusions: Unlike in the full lab report, in the executive summary’s conclusions you do NOT repeat the objectives or significant results, as the information was presented in earlier paragraphs of the executive summary. This is where you should write about the “lessons learned” from the laboratory. What were your expected results? Were those results achieved? If not, why not? Have you resolved the problem? Briefly state the logical implications of your results. Suggest further study or applications if appropriate. If you had different constraints in the laboratory, could you have gotten better results? If so, how? g. Appendix: While a typical executive summary would not include an appendix, you are required to submit the original data sheets from lab, derivations, calculations (include at least one complete set of sample calculations), and any other related information which supports the executive summary. VII. Lab #4 Wooden Beam Tests A. Objectives: 1. To study the strength and rigidity of different types of wood. 2. To determine material properties and typical factors of safety for wooden beams. B. References: Western Wood Products Association Websites: www.wwpa.org www.lumberbasics.org www.wwpa.org/techguide C. Background: Structural lumber is graded for its strength and physical working properties; aesthetics are secondary. The basic framing classifications are organized by size classifications and performance capabilities. Dimension Lumber – 2″ to 4″ thick and 2″ (nominal) and wider. Western Dimension Lumber design values, beginning in the Design Values section, are expressed as Base Values. These values must be adjusted for size and repetitive member use, prior to adjusting for other conditions of use. Dimension Lumber grades are divided into the following 3 classifications: structural light framing, light framing, and stud 1. Structural Light Framing (2×2 through 4×4, used where high-strength design values are required in light framing sizes, such as in engineered wood trusses.) Grades are: SELECT STRUCTURAL, No. 1 & BTR (DF-L, DF & Hem-Fir species only), No. 1,No. 2, No. 3 2. Light Framing (2×2 through 4×4, basic framing lumber, as used in most light-frame construction, e.g. wall framing, sills, plates, cripples, blocking, etc.) Grades are: CONSTRUCTION, STANDARD, UTILITY c. Stud (2×2 through 4×18, an optional grade intended for vertical use, as in load bearing walls.) The grade is: STUD Structural Joists & Planks (2×5 through 4×18, intended for engineering applications for lumber 5″ and wider, such as floor and ceiling joists, rafters, headers, small beams, trusses and general framing applications. Grades are: SELECT STRUCTURAL, No.1 & BTR (in Douglas Fir, Douglas Fir-Larch, or Hem-Fir species only.), No. 1, No. 2, No. 3 D. Materials: Wood beam specimens of different types and cross sections Adjustable beam supports, bearing plates, steel scale E. Equipment: Tinius-Olsen testing machine configured for compression testing F. Procedure: For each beam to be tested 1. Measure cross sectional dimensions and compare to nominal dimensions. 2- Position the beam in the Tinius-Olsen machine, to apply a concentrated load “P” at midspan. Use bearing plates between the supports and the wood and between the loading block and the wood. Record the beam span, and distance from supports to the load point. 3. Select the testing software to plot applied load “P” versus deflection at midspan. Apply load slowly until a significant failure occurs. Record ultimate load and sketch and identify the type of failure. G. Calculations: 1- Draw shear and bending moment diagrams as a function of applied load “P.” Where do the peak values for shear and moment occur? 2- Calculate the modulus of rupture for the wood fr = Mc/I at the ultimate load. 3- Using design values for wood in the National Design Specification (NDS) for Wood Construction published by the American Forest and Paper Association and the American Wood Council to calculate the factors of safety (modulus of rupture divided by allowable stress) for the bending stresses. Plot the factors of safety as a function of L/h (beam span divided by depth). Discuss any trends you see. 4- Using the formula Δ = PL3/48EI for the maximum deflection at midspan of a simply supported beam with a concentrated load at the midpoint, calculate the theoretical deflection at 25%, 50%, and 100% of ultimate load. Use values for modulus of elasticity E (not E min which is used for beam stability) and moment of inertia I as given in the design aids from the Western Woods Producers (see attached tables). Plot the theoretical deflections from your calculations on the same graph as your experimental load versus deflection plot. Discuss why theoretical deflections should diverge from the experimental deflections as the load increases. 36 37 39 CE206-LAB (wooden beams) Wood beams tested: Douglas fir Larch #2 grade (E=1.6*106 psi, Fb=900 psi) Spruce-Pine-Fir S #1 grade (E=1.2*106 psi, Fb=875 psi) Group A1 A2 A3 B1 B2 B3 C1 C2 C3 A1 A2 A3 B1 B2 B3 C1 C2 C3 Beam Type 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce 2×6 #2 Douglas 2×4 #2 Douglas 2×4 #1 Spruce Orientation on end on end on end on end on end on end on end on end on end flat flat flat flat flat flat flat flat flat Ultimate Load (lb) 3552 1500 2419 3175 2629 2840 5140 1191 2351 2857 950 1470 1357 1636 1116 1399 1101 1443 Span = L = 36″ CF= 1.3 for 6″ and 1.5 for 4″ CFu= 1 for on-end; 1.1 for 4″ flat and 1.15 for 6″ flat Comments Long split on edge throughout length Notched tension failure from knot Shear Split on edge throughout length & notched tension failure from knot Long split on edge throughout length & notched tension failure from knot Split on edge throughout length Horizontal shear parallel to the grain directly under the load point Split in tension at mid-span knot Split in tension Shear Split on edge throughout length & notched tension failure from knot Long split on edge throughout length Split on edge throughout length Long split on edge throughout length Long split on edge throughout length Split in tension at mid-span knot Split in tension Split in tension
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UF Cultural Change for Sustaining Lean Transformation Research Paper

UF Cultural Change for Sustaining Lean Transformation Research Paper

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This is a plan for creating the cultural change required to start and sustain lean. It should address what you think are the required cultural enablers for a transformation to lean. The cultural enablers can be the ones described in the text or any others you think are important. The plan should specify the cultural processes, techniques, and practices required for a lean organization. Please write the document as a concrete plan that could be implemented. Do not write the paper as a theoretical exercise, but rather as a design application for organizational cultural change. Provide as much specificity and detail as possible, i.e., who, what, where, when, and how. The plan can be generic (could be applied to any organization) or specific to a particular industry or company.

The lean plans papers should have the following:

Title page. Numbered in lower case Roman numerals, but not shown.

Table of Contents (optional, but appreciated). Numbered in lower case Roman numerals and shown.

Body of the paper. Start with an short introduction that describes the approach and intent of the plan. The plan should make liberal use of headings and sections to describe the content of the plan. Organization of the plan can be sequential or topical, but should be reader friendly and include scholarly sources. The plan should emphasize the what and how of lean using concrete tasks rather than strictly theory.

Each paper should end with a robust conclusion.

THIS IS BOOK BEING USED:

Manos, A., & Vincent, C. (Eds.) (2012). The leanhandbook: A guide to the bronze certification body ofknowledge. Milwaukee, WI: ASQ Quality Press. ISBN9780873898232

 

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The Lean Handbook A Guide to the Bronze Certification Body of Knowledge Anthony Manos and Chad Vincent, editors ASQ Quality Press Milwaukee, Wisconsin American Society for Quality, Quality Press, Milwaukee 53203 © 2012 by ASQ All rights reserved. Published 2012 Library of Congress Cataloging-in-Publication Data The lean handbook / Anthony Manos and Chad Vincent, editors. p. cm. Includes bibliographical references and index. ISBN 978-0-87389-804-1 (alk. paper) 1. Total quality management. 2. Industrial efficiency. I. Manos, Anthony, 1963– II. Vincent, Chad. HD62.15.L4324 2012 658.4’013-dc23 2012010040 No part of this book may be reproduced in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Publisher: William A. Tony Acquisitions Editor: Matt Meinholz Project Editor: Paul Daniel O’Mara Production Administrator: Randall Benson ASQ Mission: The American Society for Quality advances individual, organizational, and community excellence worldwide through learning, quality improvement, and know ledge exchange. Attention Bookstores, Wholesalers, Schools, and Corporations: ASQ Quality Press books, video, audio, and software are available at quantity discounts with bulk purchases for business, educational, or instructional use. For information, please contact ASQ Quality Press at 800-248-1946, or write to ASQ Quality Press, P.O. Box 3005, Milwaukee, WI 532013005. To place orders or to request a free copy of the ASQ Quality Press Publications Catalog, visit our website at http://www.asq.org/quality-press To Jennifer, who puts up with all my antics. To Judy, who taught me her version of continuous improvement “Do not rest on your laurels” And to George, for supporting me and for helping me reach a higher level of accomplishment. —Tony Manos To my wife, Holly, and my kids, Austin and Miranda, who gave up their time with a husband and father to make this book possible, and whose continued support provides me strength to pursue my dreams. —Chad Vincent Foreword Robert D. Miller Executive Director The Shingo Prize for Operational Excellence Jon M. Huntsman School of Business Utah State University T he Lean Handbook is a terrific compilation of sections written by practitioners who bring their individual and unique experience and expertise to this body of knowledge. I appreciate the connections made with many of the dimensions and principles identified in the Shingo model. We must each be on a journey of continuous improvement, which means we must be constantly looking for new perspectives and approaches to bring about personal and organizational improvement. Anthony Manos is correct when he says that the most difficult and yet important work we will do with lean is to change the culture of the organization. For lean to be successful, the many tools outlined in this handbook must be supplemented with an equally devoted effort to influence the mind-sets and behaviors of people in the organization. At the Shingo Prize we have learned that the best way to do this is to, as Stephen Covey would say, “begin with the end in mind” In other words, while you are learning to use these great tools, you must also keep the deeper meaning, or the “why” behind the tools, very clear. The Lean Handbook can help each of us act our way into a new way of thinking, and then think our way into a new way of acting. By putting the wisdom of this handbook to work every day by every person and never taking your eyes off the prize a new culture that is deeply embedded in the principles of lean we will greatly increase the odds of a sustainable business transformation. As you put this work into practice, you will recognize the shifting roles of leaders and managers in your organization. It is not enough for leaders to just keep doing what they have always done, nor is it enough for them to merely support the work of others. Rather, leaders must lead the cultural transformation and build the principles behind all of these great tools into the mind-sets of their associates. Similarly, managers have to do more than participate in kaizen teams. The emerging role of managers is to focus on designing, aligning, and improving the systems of the business so that they drive ideal behaviors that cause people to change their thinking of what excellence really looks like. Using The Lean Handbook as a roadmap will no doubt be a powerful tool in helping you avoid many of the mistakes made by others over the years. I invite you to visit http://www.shingoprize.org to see how the key points illustrated here support the Shingo model for operational excellence. My thanks to all of the contributing authors! Preface WELCOME TO THE LEAN HANDBOOK What a remarkable journey this has been. Working on this book has been a terrific experience. We have had the great pleasure of working with a number of wonderful and giving individuals. Lean practitioners are truly an amazing and unique family. The energy and willingness of the individuals who helped create this book are evidence of the great profession and network of people of which we take part. So many different points of view and applications of knowledge made for great discussions, contemplation, and collaboration. With so much knowledge and understanding, it was difficult to find a point at which to stop talking and start putting these discussions on paper. In the end, we believe this book embodies the Lean Body of Knowledge (BOK) in a way that is much like the lean journey ever evolving and always adaptable. Lean has been a culmination of multiple individuals, philosophies, systems, tools, and applications throughout history. The challenge has been that all these different contributions are found in different places, called different things, and applied in different manners-making it difficult for the lean practitioner to gain an understanding of lean at a level of its full body of knowledge without great effort, research, experience, and networking. While this book is not a substitute for the effort, research, experience, and networking every seasoned lean practitioner goes through, we hope it provides a sound starting point for those just beginning or expanding their knowledge of lean. NOT AN EXAM PREPARATION MANUAL First and foremost, this book is not a Lean Certification exam preparation manual. The Lean Bronze Certification exam questions are based on material from the five recommended reading books (see Appendix B, “Recommended Reading List for Lean Certification Exam Preparation”): Learning to See Lean Thinking Gemba Kaizen Lean Production Simplified Lean Hospitals Make no mistake this book takes nothing away from the great lean works that have preceded it. As a matter of fact, we believe that this book complements and pays tribute to those works as being pieces of the larger Lean BOK. But that is exactly what they are pieces. Our intent was to put these pieces together in a manner to provide a higher-level overview of the Lean BOK. We realized early on in the project that this task was not something we could do alone. This handbook’s intention is to gather information related to the Lean BOK (see Appendix A, “Lean Certification Body of Knowledge”) into one source. This book will enhance your understanding of the BOK as a whole and give you a more holistic look at lean. As great as the five recommended reading books are, they were not written with the intent of covering all aspects of the Lean BOK individually. Additionally, this book does not rehash the content of the five recommended reading books. What we have done is put together a book whose sole purpose is to embody the entire Lean BOK, section by section. This book is, by design, written at the Bronze Level for certification knowledge. This means that the weightings used in the Lean BOK for the Bronze Certification were considered for the depth and breadth of material considered for each rubric. Therefore, it is by no means all-inclusive of every principle, system, and tool at every level of application related to lean. By addressing the Lean BOK at the Bronze Level, this book provides a basic understanding of the lean principles, systems, and tools at a tactical level to drive improvements with measureable results. The intent is to revise the book over time to encompass the topics of the Silver Level (an integrated application on value stream transformations for lean leaders) and the Gold Level (for strategic application of lean across the entire enterprise, with emphasis on assets, systems, processes, and people). Therefore, this book, much like a lean journey in an organization, will be adapted as the Lean BOK evolves and more knowledge is integrated. Given that the intent of this book is not to rehash the certification reference books, we hope that this book serves as a good starting point for those practitioners who want a holistic view of the Lean BOK, with links to many other lean references for greater detail and understanding. While there are many references, we tried to stay true to the terminology and applications discussed in the core books of the certification reading list. One of the difficulties we faced in creating a book of this magnitude was how to structure it. While we could have structured it alphabetically by topic, organized it by case studies or by organizations, or arranged it by some other method, we wanted to stay true to the Lean BOK structure. While this structure does not allow for a nice flow from one topic to another for easier reading, the writing conforms to the Lean BOK and the Shingo Prize model. We thought that this would provide a traceable reference for those individuals and organizations utilizing those structures for the pursuit of operational excellence. When lean is applied in an organization, the knowledge of the processes and the generations of ideas do not come from the organization’s designated lean experts. They come from those who perform the work on a daily basis. We took the same approach with this book. It would have been easy for us to read all the books and then pull information from those books to create another book. But then it would have been just that another book. We needed to take a lean approach with this book. So, just as you would create a team of individuals who perform the work in a kaizen event, we assembled a team of individuals who perform the work and who apply lean in their organizations every day. MANY VOICES AND MANY STYLES We were lucky to have some of the best minds in lean contribute to this endeavor (see “Contributing Authors and Editors”). There are many voices, many contributors, many styles of writing, and more than one point of view. The contributing authors come from many different backgrounds. Such different life experiences weave a wonderful lean tapestry. This book is not just lean for manufacturing or lean for service or lean for healthcare. The examples given in this book can fit any type of organization. We hope you find these different points of view helpful while finding your voice in lean. It has been a pleasure to not only be authors and share our knowledge of lean but also be editors and work closely with others like us. The great thing about working with all these individuals was learning how they apply the same things we apply, but maybe just a little differently. These differences provided us a different perspective on our version of lean and were wonderful opportunities to expand our personal lean knowledge base. Coming together is a beginning. Keeping together is progress. Working together is success. —Henry Ford We wish you the best of luck and fair weather on your lean journey! Acknowledgments I t would be nearly impossible to mention everyone who had an influence on the creation of this lean handbook, but we would like to make a few special mentions. First and foremost we would like to thank all the contributing authors, who worked tirelessly to help construct and shape this handbook. Their willingness to share their knowledge and experience was exceptional. To learn more about these extraordinary lean thinkers, see “Contributing Authors” A special acknowledgment goes to all the people and organizations that the contributing authors and editors have worked with over the years to help develop and deepen our understanding of lean and influence us as we continue to learn more. This handbook would not have been possible without the support of the Lean Enterprise Division (LED) of the American Society for Quality (ASQ) and the LED Leadership Team Kiami Rogers (chair), Frank Murdock (chair-elect), and Tammy Miller (secretary). We would also like to thank George Alukal, founding member of the LED and the driving force behind lean’s becoming an integral part of ASQ and a resource for its members. The Lean Certification is supported by the four alliance partners: the Society of Manufacturing Engineers (http://www.sme.org), the Association for Manufacturing Excellence (http://www.ame.org), the Shingo Prize (http://www.shingoprize.org), and of course ASQ (http://www.asq.org). We would like to thank Kris Nasiatka from the Society of Manufacturing Engineers (SME) for all her efforts in creating the Lean Certification and for her continued support of the partner organizations and this lean handbook. Also from SME, Kelly Lacroix leads the Lean Certification Oversight and Appeals Committee, which continually monitors and improves the certification process. If it wasn’t for our friends Matt Meinholz and Paul O’Mara at ASQ Quality Press, this book never would have been completed. We appreciate their patience and advice while working on this endeavor. Last, but not least, we would like to give our utmost gratitude to Robert Damelio. As a member volunteer, Robert not only was the driving force behind ASQ’s LED adopting the Lean BOK, but he also guided the certification initiative at ASQ. Without his tireless efforts, ASQ would not have been a partner member of the Lean Certification. A Brief History of the Lean Certification Body of Knowledge Kris Nasiatka, SME HOW IT STARTED The publication of The Machine that Changed the World, in 1990, brought the concept of lean to the masses. It also provided opportunities for many different flavors of lean to be born. With that came a myriad of education, training, and consulting practices, each bringing its own version of lean to the market. In 2001, members of the Society of Manufacturing Engineers (SME) and the Association for Manufacturing Excellence (AME), and constituents of the Shingo Prize came together and determined that some type of validation for professional practice of lean was necessary. There was a need to align practitioners with a common foundation (fundamentals) of lean practice and, more importantly, provide a roadmap to support workforce development and training efforts. After a few stops and starts, development was under way in earnest in 2004. The parties involved agreed that the Shingo Prize model should serve as the basis for the program’s Body of Knowledge (BOK). The initial BOK went deeply into evaluating lean practitioners’ job tasks. The model was modified to make it applicable to people and workforce development efforts versus being a corporate lean transformation model. The proposed Lean BOK was validated in a study in early 2005, thus launching version 2.0. KAIZEN BLITZ WEEK Shortly after version 2.0 was launched, a core development committee was established. With the preliminary validation of the BOK in place, a straw man for program components was outlined. SME hosted a “blitz week” to expedite development of the program. Nearly 60 lean practitioners, representing a breadth of manufacturing industries, consulting practices, and academia, gathered for a week to develop the components of this new certification program. During the blitz, development teams were established to focus on exams, portfolios, and the mentoring requirements for this new program. Throughout the entire development process, nearly 200 lean practitioners were involved in the creation of this program not including the couple of thousands that participated in the study. The first Bronze exam was offered to the public in March 2006. The Silver exam was available in June 2006, and the Gold exam was launched in December of that year. The formal Lean Certification Oversight and Appeals Committee was established and met for the first time in March 2006. UPDATED VERSION OF THE BOK With the program “live” for a year, a second BOK validation study was conducted. It was desired to structure the certification BOK similar to the Shingo Prize model. The Shingo Prize was restructuring its model, which created an opportunity for the certification program to validate proposed changes to the BOK received by certification candidates as well as the oversight body. The validation study was completed in 2007. The Lean Certification Oversight and Appeals Committee used the findings to restructure the BOK and launched version 3.0 in 2008 (see Appendix A). Although the topics did not change, the BOK was reorganized for better flow and improved alignment of topics within each category. Each BOK validation study is structured in a way that derives a weighting factor for each section of the BOK. The weighting factors identify the percentage of exam coverage for each BOK area and help the committee identify priority areas for building the exam bank. THE FUTURE OF THE BOK Validation studies will be conducted every five to seven years. The studies are intended to verify that current topics are still relevant in contemporary practice of lean and to identify any new or emerging topics that should be added to the BOK. Special Dedication Kiami Rogers Chairperson, ASQ Lean Enterprise Division T his handbook is dedicated in loving memory to Wayne Paupst (1957–2010), past chairman of the Lean Enterprise Division (LED). In August 2010, Wayne lost a long battle with cancer. Wayne was a quality professional’s “quality professional” He never complained about his condition. In fact, many of us on the Leadership Team, which worked closely with Wayne, were not even aware of the severity of his condition. Wayne possessed a wonderful sense of humor and had a kind word for everyone. He was always ready with a joke, and always ready to laugh at jokes offered by others. His leadership, instruction, kindness, and humor will be missed by family and friends as well as organizations such as ASQ. I first met Wayne at a meeting of the founders of the LED prior to the LED becoming a forum and subsequently a division. Wayne had been a member of ASQ since 1988. He had more than 25 years in the quality profession, holding positions such as quality engineer, quality systems coordinator, inspector, and quality assurance manager. He had been instructing certification courses for the Lehigh Valley Section of ASQ since 1996 and also had provided instructional courses for many of the top companies in the Lehigh Valley as well. Wayne also held several ASQ certifications: Six Sigma Black Belt, Quality Engineer, Quality Manager, Quality Auditor, Quality Technician, Quality Inspector, Process Analyst, and Quality Improvement Associate. It was during Wayne’s tenure as LED division chair that ASQ introduced the Lean Certification, in partnership with SME, AME, and the Shingo Prize organizations. I have no doubt that Wayne would have pursued obtaining the ASQ Lean Certification himself, as well as teaching and mentoring other lean professionals pursuing this certification. It is with great honor that we dedicate this handbook to Wayne. Prologue Kiami Rogers Chairperson, ASQ Lean Enterprise Division T he purpose of this handbook is to provide a reference guide for lean principles and methods. This handbook on its own is not intended to prepare one for the ASQ Lean Certification (in partnership with SME, AME, and the Shingo Prize organizations). The user of this handbook is a lean professional who has some knowledge of and experience with lean principles and methods. Material from several lean practitioners with differing levels of disclosure of their experiences has been gathered to create this handbook and has been edited to be presented in a consistent and unified format. With 6000 members worldwide, the ASQ Lean Enterprise Division (LED) is a global network of professionals helping individuals and organizations apply proven and leading edge lean principles and practices to achieve dramatic results for personal and organizational success. Whether or not you are a member of the ASQ LED, we hope you find this handbook a useful guide in your lean journey. Contributing Authors and Editors T his handbook was a large collaborative effort, and we would especially like to thank all the contributing authors, who shared their time and wisdom to help make this endeavor possible. CONTRIBUTING AUTHORS Christopher Abrey is a program manager with Northstar Aerospace in Bedford Park, Illinois. He earned a bachelor of engineering in manufacturing systems engineering from Coventry University, UK. He is a senior member of the Society of Manufacturing Engineers (SME) and a member of the Association of Manufacturing Excellence (AME). Christopher has more than 20 years of lean experience in manufacturing and recently completed the Lean Bronze Certification. He can be reached at cabrey@nsaero.com. Section 2.2.5. Total Productive Maintenance (including predictive) Andy Carlino is cofounder and partner of the Lean Learning Center. In addition to over 20 years’ experience in real-world senior management, including president and COO, he has for the past 20 years been providing consulting, training, and coaching services from the boardroom to the shop floor to organizations across the globe. He has published numerous articles and is coauthor of the Hitchhiker’s Guide to Lean: Lessons from the Road. Andy is a frequent speaker for a variety of professional organizations and corporate conferences, including guest speaker for Clemson and Harvard University. He holds a BS in engineering and a BA in psychology and is a member of SME, SAE, AME, ASQ, and numerous other industry and professional associations. Sections 1.2.1. Planning & Deployment 1.2.2. Create a Sense of Urgency 1.2.3. Modeling the Lean Principles, Values, Philosophies 1.2.7. Motivation, Empowerment & Involvement Adil Dalal is CEO of Pinnacle Process Solutions, Intl.; a keynote speaker; thought leader in lean, project management, and leadership; and author of The 12 Pillars of Project Excellence: A Lean Approach to Improving Project Results. He has earned MS degrees in engineering management and mechanical engineering. He is a Certified Lean Bronze Professional, Certified Quality Engineer (CQE), Project Management Professional (PMP), and Board Certified Executive Coach. He is the chair of ASQ’s Human Development & Leadership Division, and certification chair of the Lean Enterprise Division. He served on the Lean Certification Oversight and Appeals Committee. He can be reached at adil@pinnacleprocess.com Sections 1. Cultural Enablers 1.1. Principles of Cultural Enablers 1.1.1. Respect for the Individual 4.3.5. Competitive Impact Grace Duffy is president of Management and Performance Systems. She holds an MBA from Georgia State University and has coauthored numerous books: The Quality Improvement Handbook, Executive Guide to Improvement and Change, Executive Focus: Your Life and Career, The Public Health Quality Improvement Handbook, QFD and Lean Six Sigma for Public Health , Modular Kaizen: Dealing with Disruption, and Tools and Applications for Starting and Sustaining Healthy Teams . She is an ASQ Certified Manager of Quality/Organizational Excellence (CMQ/OE), Improvement Associate, Auditor, Lean Six Sigma Master Black Belt (LSS MBB), and ASQ Fellow. Section 2.2.8. Strategic Business Assessment David S. Foxx is a senior manager and Champion of the Continuous Process Improvement Community of Practice at Deloitte Consulting. He earned an MBA at the University of Phoenix and a bachelor of science in industrial engineering at the University of Texas at El Paso. David is a leader in enterprise transformation and specializes in innovation, product, process, and service design. David presented “Total Quality Design; An Imperative for Survival” at the Annual Quality Congress. He is a senior member of ASQ and a member of the ASQ Quality Press Standing Review Board, the Institute of Industrial Engineers (IIE), and the International Society of Six Sigma Professionals (ISSSP). His certifications include ASQ Certified Six Sigma Black Belt (CSSBB), LSS MBB, Lean Master, and Design and Innovation Master Black Belt. He can be reached at sixsigmalean@aol.com Sections 2.1.2.2. 7 Wastes (Muda), Fluctuation (Mura), and Overburden (Muri) 2.3.5. Product and Service Design 2.3.5.1. Concurrent Engineering 2.3.5.2. Quality Function Deployment 2.3.5.3. Product or Process Benchmarking 2.3.5.4. Design for Product Life Cycle (DFx) – Cradle to Cradle 2.3.5.5. Variety Reduction – Product and Component 2.3.5.6. Design for Manufacturability 4.3.2. Delivery 4.3.2.1. Takt Time 4.3.2.2. Cycle Time 4.3.2.3. Lead Time Dr. Gwendolyn Galsworth is president and founder of Visual Thinking, a training, research, and consulting firm, and the VTI/Visual-Lean Institute, which offers licensing and train-the-trainer in nine core visual workplace courses. Over some 30 years of handson implementations, Gwendolyn has nearly single-handedly created the models, concepts, and methods of workplace visuality that define visual’s distinct and powerful contribution to enterprise excellence and to sustainable cultural and bottom-line results. Gwendolyn serves as a Shingo Prize examiner. She is the author of Visual Systems: Harnessing the Power of the Visual Workplace ; Smart, Simple Design: Using Variety Effectiveness to Reduce Total Cost and Maximize Customer Selection ; two Shingo award-winning books, Visual Workplace, Visual Thinking: Creating Enterprise Excellence through the Technologies of the Visual Workplace and Work That Makes Sense; and many DVDs. She can be reached at gwendolyn@visualworkplace.com Section 2.2.1. Visual Workplace Bruce Hamilton is president of the Greater Boston Manufacturing Partnership, headquartered at the University of Massachusetts Boston campus. He attended Bowdoin College and earned a BA from the University of Arizona. Bruce is the creator of Toast Kaizen2 and other lean training videos, and also coauthor with Pat Wardwell of the eContinuous Improvement System Manual. He posts weekly to his blog: http://www.oldleandude.org both a recipient of the Shingo Prize and an inductee into the Shingo Prize Academy, Bruce is also a Shingo Prize examiner and a member of the Shingo Prize Board of Governors. He can be reached at pokayoke@comcast.net Sections (with Pat Wardwell) 2.1.2. Identification & Elimination of Barriers to Flow 2.1.2.1. Flow & the Economies of Flow 2.1.2.3. Connect & Align Value Added Work Fragments 2.1.2.4. Organize around Flow 2.1.2.5. Make End-to-End Flow Visible 2.1.2.6. Manage the Flow Visually 2.3.7.1. Mistake and Error Proofing (Poka Yoke) 2.3.7.4. Right Sized Equipment 2.3.7.5. Cellular Flow John Kendrick is a principal with Fujitsu in Sunnyvale, California, and has more than 15 years of lean experience in manufacturing, finance, telecommunications, and healthcare. John holds a master of engineering degree in simulation and modeling from Arizona State University, a master of applied statistics from Penn State, and a master of business administration in finance from the University of Pittsburgh. He is a Certified Six Sigma Master Black Belt (CSS MBB) and a senior member of ASQ. He is also a CSSBB, Certified Reliability Engineer (CRE), Certified Software Quality Engineer (CSQE), and CMQ/OE and holds two Lean Certifications. Sections 2.3.1. Work Flow Analysis 2.3.1.1. Flowcharting 2.3.1.2. Flow Analysis Charts 2.3.1.3. Value Stream Mapping 2.3.1.4. Takt Time Analysis 4.2.1. Measurement 4.2.1.1. Understand Interdependencies between Measures and Measurement Categories 4.2.1.2. Align Internal Measures with What Matters to Customers 4.2.1.3. Measure the Results from the “Whole” System 4.2.1.4. Measure Flow and Waste 4.2.3. Analysis – Understand What Moves the Dial on Measures 4.2.4. Reporting 4.2.4.1. Visible Feedback Real-Time Matthew Maio is a quality manager at Raytheon IDS in White Sands, New Mexico. He earned bachelor’s degrees in business and computer science from the College of Santa Fe, New Mexico. He is the author of Quality Improvement Made Simple and Fast! and coauthor of The Six Sigma Green Belt Handbook (both from ASQ Quality Press). Matthew is a member of the International Test and Evaluation Association and the Directed Energy Professionals Society. He is a senior member of ASQ and past regional director (board member) and section chair of ASQ. He holds ASQ certification as a CQM/OE, CSSBB, Certified Six Sigma Green Belt (CSSGB), CSQE, and Certified Quality Auditor (CQA) and Defense Acquisition University Lean Six Sigma Yellow Belt (LSSYB) and Process Quality Management (PQM) certification/recognition. He can be reached at Matt_Maio@comcast.net. Sections 1.2.4. Message Deployment – Establishing Vision and Direction 1.2.5. Integrating Learning and Coaching 1.2.6. People Development – Education, Training & Coaching 1.2.8. Environmental Systems 1.2.9. Safety Systems 2.1.5.1. Quality at the Source 2.1.5.4. Multi-Process Handling 2.2.6. Standard Work 2.2.7. Built-in Feedback 2.2.15. Knowledge Transfer 2.3.7.3. One Piece Flow 2.3.7.4. Right Sized Equipment 2.3.7.6. Sensible Automation 2.3.7.8. Source Inspection David Mann is principal at David Mann Lean Consulting. He is the Shingo Prize-winning author of Creating a Lean Culture: Tools to Sustain Lean Conversions (Productivity Press). David serves on the editorial board of AME’s publication, Target, on the management science faculty at the Fischer College of Business at Ohio State University, and as a Shingo Prize examiner. He earned his PhD in psychology from the University of Michigan. He can be reached at dmann@dmannlean.com. Sections 2.1.1. Process Focus 3.1.1.3. Closed-Loop Thinking to Assure Effective Feedback of Organizational Learning Anthony Manos is a catalyst with Profero and lean champion at 5S Supply in Frankfort, Illinois. He earned an MBA in entrepreneurial studies from the University of Illinois at Chicago. He is the coauthor of Lean Kaizen: A Practical Approach to Process Improvement (ASQ Quality Press), a senior member of ASQ, senior member of SME, cofounder and past chair of ASQ’s Lean Enterprise Division, and a member of the Lean Certification Oversight and Appeals Committee. He is Lean Bronze Certified. He can be reached at anthony.manos@proferoinc.com. Sections 1.1.2. Humility 1.3.5. Coaching & Mentoring 2.2.1.1. 5S Standards and Discipline 3.2.2. Policy Deployment/Strategy Deployment 4.3.5.1. Customer Satisfaction Brian H. Markell is president of BMA in Cherry Hill, New Jersey, and St. Albans, Hertfordshire, England. He has an engineering degree from the University of Sussex, England. Brian is certified with the Chartered Institute of Management Accountants (CIMA) in London, the American Institute of Certified Public Accountants (AICPA), and the Institute of Management Accountants (IMA). He is a Fellow of the American Production and Inventory Control Society (APICS). Brian is the author of eight books, including Making the Numbers Count: The Accountant as Change Agent on the World Class Team (second edition) and Practical Lean Accounting: A Proven System for Measuring and Managing the Lean Enterprise (second edition). He can be reached at bmaskell@maskell.com Section 4.2.1.5. Lean Accounting Timothy F. McMahon is the founder of and a contributor to A Lean Journey Blog (http://aleanjourney.com). He has a BS in chemical engineering from the University of Massachusetts and holds a Lean Certification and Six Sigma Black Belt from Central Connecticut State University. Tim is a member of the regional board of directors for AME and currently serves as the VP of program for northeast region. He can be reached at Tim@aleanjourney.com Sections 1.3.1. Cross Training 1.3.3. Instructional Goals 1.3.6. Leadership Development 1.3.7. Teamwork 1.3.8. Information Sharing (Yokoten) 1.3.9. Suggestion Systems 2.2.14. Pull System 2.3.6. Organizing for Improvement 2.3.6.1. Kaizen Blitz Events 2.3.7. Countermeasure Activities 2.3.7.1. Mistake and Error Proofing (Poka Yoke) 2.3.7.2. Quick Changeover/Setup Reduction (SMED) 2.3.7.3. One Piece Flow 2.3.7.4. Right Sized Equipment 2.3.7.5. Cellular Flow 2.3.7.7. Material Signals (Kanban) Dr. Mark W. Morgan is the associate vice president for institutional effectiveness and research at Seminole State College of Florida. Mark earned his doctorate in educational leadership from the University of Florida and is a three-time examiner for the Malcolm Baldrige National Quality Award. Mark was an improvement consultant for Fortune 500 companies for more than 10 years and is the author of three books on measurement and performance improvement, including his latest, The Path to Profitable Measures: 10 Steps to Feedback That Fuels Performance (ASQ Quality Press). Section 4.1. Principles of Business Results Frank Murdock is senior process engineer at Plymouth Tube Company in West Monroe, Louisiana. He earned a BS in engineering science at Purdue University, an MS in applied mathematics at the University of Michigan, and an MS in industrial engineering at Wayne State University. Frank spent 28 years with the Ford Motor Company, 8 years as an independent consultant, and 6 years as an adjunct professor at Lawrence Technological University. A senior member of ASQ and an ASQ Certified Six Sigma Black Belt, Frank is chair-elect for the Lean Enterprise Division as well as chair of the ASQ Voice of the Customer Committee. He can be reached at fmurdock@plymouth.com. Section 4.2.1.6. Voice of the Customer Mike Osterling has been a lean management practitioner and leader since the mid-1990s and is the lead consultant at Osterling Consulting, a San Diego–based firm. He earned an MBA in international business at San Diego State University and a BS in production and operations management. Mike coauthored The Kaizen Event Planner: Achieving Rapid Improvement in Office, Service, and Technical Environments. He is a certified trainer for the implementation of lean manufacturing (University of Kentucky) and a Lean Six Sigma Black Belt (University of California San Diego). He is certified in production and inventory management (APICS). He can be reached at mike@mosterling.com. Sections 2.1.5. Jidoka 2.1.7. Seek Perfection Mark Paulson is a quality manager for CDI in Minneapolis, Minnesota. He holds a Bachelor of Science degree in business administration. Mark is a senior member of ASQ, president of the Association for Manufacturing Excellence (AME); North Central Region, former Minnesota Quality Award examiner/team leader, approved trainer for Bronze Lean Certification refresher class and associated exam, and member of the Lean Certification Oversight and Appeals Committee. He is an ASQ Certified Manager of Quality/Organizational Excellence, Quality Engineer, Quality Auditor, and Bronze Lean Certified. Sections 2.1.4. Scientific Thinking 2.1.4.1. Stability 2.1.4.2. Standardization 2.1.4.3. Recognize Abnormality 2.1.4.4. Go and See 2.1.5. Jidoka 2.1.5.1. Quality at the Source 2.1.5.2. No Defects Passed Forward 2.1.5.3. Separate Man from Machine 2.1.5.5. Self-Detection of Errors to Prevent Defects 2.1.5.6. Stop and Fix 2.1.7.1. Incremental Continuous Improvement (Kaizen) 2.1.7.2. Breakthrough Continuous Improvement (Kaikaku) Robert (Bob) Petruska works as a performance improvement consultant in Charlotte, North Carolina. He has a Master of Science degree in manufacturing systems from Southern Illinois University. Bob is a senior member of ASQ and a CSSBB. Bob is authoring a book titled Gemba Walks for Service Excellence: The Step-by-Step Guide for Identifying Service Delighters, to be published in 2012 by Productivity Press. Sections 3.2.1. Enterprise Thinking 3.2.1.1. Organize around Flow 3.2.1.2. Integrated Business System and Improvement System 3.2.1.3. Reconcile Reporting System 3.2.1.4. Information Management Govind Ramu is a senior manager for global quality systems for SunPower Corporation. Prior to this role, he was Six Sigma Master Black Belt for JDS Uniphase Corporation. Govind is a professional engineer (mechanical) from Ontario, Canada, and an ASQ Fellow. He holds six ASQ certifications. Govind has had articles published in Quality Progress and in the Six Sigma forum. He coauthored ASQ’s The Certified Six Sigma Green Belt Handbook, for which he received the ASQ Golden Quill Award in 2008. Additionally, Govind was a 2006 and 2011 examiner for the California Awards (CAPE) and a 2010 examiner for the Malcolm Baldrige Award. He can be reached at ramu.govind@gmail.com Sections 2.1.5.1. Quality at the Source 2.1.7.1. Incremental Continuous Improvement (Kaizen) 2.2.9. Continuous Improvement Process Methodology 2.2.9.1. PDCA 2.2.9.2. DMAIC 2.2.9.3. Problem Solving Storyboards 2.2.10. Quality Systems 2.2.11. Corrective Action System 2.3.3.3. Failure Mode and Effects Analysis 2.3.4. Presenting Variation Data 2.3.4.1. Statistical Process Control Charts 2.3.4.2. Scatter and Concentration Diagrams 2.3.5.2. Quality Function Deployment 2.3.5.4. Design for Product Life Cycle (DFx) – Cradle to Cradle 2.3.5.6. Design for Manufacturability Rama Shankar is the managing partner at Delta Management Associates in Glenview, Illinois. She has a master’s degree in engineering management from Northwestern University and a master’s degree in materials management from Indian Institute of Materials Management, India. Rama is the author of Process Improvement Using Six Sigma: A DMAIC Guide (ASQ Quality Press). She is a senior member of ASQ and a past chair, section director, and training institute director of the ASQ Chicago Section. Rama is a past Malcolm Baldrige Award examiner, an ASQ CSSBB, and a CQA. She is also a certified trainer by NIST for lean. Sections 2.1.5. Jidoka 2.1.5.1. Quality at the Source 2.1.5.2. No Defects Passed Forward 2.1.5.3. Separate Man from Machine 2.1.5.4. Multi-Process Handling 2.1.5.5. Self-Detection of Errors to Prevent Defects 2.1.5.6. Stop and Fix With Tim McMahon 1.3.2. Skills Assessment 1.3.4. On-the-Job Training 1.3.6. Leadership Development 1.3.7. Teamwork With Govind Ramu 2.2.9.1. PDCA 2.2.9.2. DMAIC 2.2.9.3. Problem Solving Storyboards 2.2.11. Corrective Action System 2.2.11.1. Root Cause Analysis 2.2.12. Project Management 2.3.2. Data Collection and Presentation 2.3.2.1. Histograms 2.3.2.2. Pareto Charts 2.3.2.3. Check Sheets 2.3.3. Identify Root Cause 2.3.3.1. Cause & Effect Diagrams (Fishbone) 2.3.3.2. 5-Whys 2.3.3.3. Failure Mode and Effects Analysis 2.3.4. Presenting Variation Data 2.3.4.1. Statistical Process Control Charts 2.3.4.2. Scatter and Concentration Diagrams Gregg Stocker is an operational excellence advisor at Hess Corporation in Houston, Texas. He earned an MBA from the University of Houston and a BA from Michigan State University. Gregg is the author of Avoiding the Corporate Death Spiral: Recognizing & Eliminating the Signs of Decline (ASQ Quality Press). He is a certified purchasing manager from the Institute for Supply Management. He can be reached at gstocker1111@gmail.com Sections 2.2.4. 3P Production Process Preparation 2.2.13. Process Design 3.1.1. Systemic Thinking 3.1.2. Constancy of Purpose 3.1.3. Social Responsibility 4.2.2. Goal and Objective Setting Chad Vincent is a lean manufacturing specialist with Greif in St. Louis, Missouri. He earned a BS in engineering management from Missouri University of Science and Technology. Chad is a senior member of ASQ and SME, and the current ASQ Lean Enterprise treasurer. He serves on the Lean Certification Oversight and Appeals Committee. Chad is a CQE, CRE, CMQ/OE, CSSBB, and Lean Bronze Certified. He can be reached at chadvincent88@gmail.com. Sections 2.1. Principles of Continuous Process Improvement 2.1.2.2. 7 Wastes (Muda), Fluctuation (Mura), and Overburden (Muri) (with David Foxx) 2.1.5.1. Quality at the Source (with Govind Ramu and Mark Paulson) 2.1.5.3. Separate Man from Machine 2.1.6. Integrate Improvement with Work 2.1.7. Seek Perfection 2.2. Continuous Process Improvement Systems 2.2.2. Lot Size Reduction 2.2.3. Load Leveling 2.2.4. 3P Production Process Preparation 2.2.10. Quality Systems 2.2.10.1. ISO and Other Standards 2.2.11. Corrective Action System 2.3. Continuous Process Improvement Techniques & Practices 2.3.1. Work Flow Analysis 2.3.1.1. Flowcharting (with John Kendrick) 2.3.1.2. Flow Analysis Charts (with John Kendrick) 2.3.1.3. Value Stream Mapping 2.3.1.4. Takt Time Analysis (with Matt Maio) 2.3.8. Supplier Processes External 2.3.8.1. Supplier Managed Inventory 2.3.8.2. Cross-Docking 2.3.8.3. Supplier Assessment and Feedback 2.3.8.4. Supplier Development 2.3.8.5. Supplier Benchmarking 2.3.8.6. Logistics 2.3.9. Supply Processes Internal 2.3.9.1. Material Handling 2.3.9.2. Warehousing 2.3.9.3. Planning and Scheduling 4.3. Key Lean Related Measures 4.3.1. Quality 4.3.1.1. Rework 4.3.1.2. First Pass Yield 4.3.3. Cost 4.3.3.1. Inventory Turns 4.3.3.2. Queue Time 4.3.3.3. Wait Time (delays) 4.3.3.4. Overall Equipment Effectiveness (OEE) 4.3.3.5. Changeover Time 4.3.4. Financial Impact 4.3.4.1. Cash Flow Pat Wardwell is the chief operating officer at Greater Boston Manufacturing Partnership 2 in Boston, Massachusetts. She holds a BA from the University of Maine and an MBA from Bentley College. Pat is the coauthor of e-Continuous Improvement System. Her accomplishments include SME Lean Gold Certified, past chair of the Lean Certification Oversight and Appeals Committee, Shingo Prize recipient and examiner, AME Manufacturing Excellence Awards committee member and examiner, AME Northeast Board of Directors, and member of SME Boston Chapter Leadership Committee. She can be reached at pwardwell@gbmp.org. Sections (with Bruce Hamilton) 2.1.2. Identification & Elimination of Barriers to Flow 2.1.2.1. Flow & the Economies of Flow 2.1.2.3. Connect & Align Value Added Work Fragments 2.1.2.4. Organize around Flow 2.1.2.5. Make End-to-End Flow Visible 2.1.2.6. Manage the Flow Visually 2.3.7.1. Mistake and Error Proofing (Poka Yoke) 2.3.7.4. Right Sized Equipment 2.3.7.5. Cellular Flow Jerry M. Wright, P.E., is the senior vice president of lean and enterprise excellence for DJO Global in Vista, California. He earned an MBA in 2002 from the University of Phoenix and is a registered professional engineer in the state of California. He is the annual international conference chair for AME for Chicago in 2012 and also a west region director for AME. He is also the chair of the So Cal Lean Network, an affiliation of more than 75 companies focused on lean and sharing in Southern California, as well as a Shingo Prize examiner and a previous Baldrige Award examiner. He can be reached at jerry.wright@djoglobal.com. Sections 3.3.1. A3 3.3.2. Catchball 3.3.3. Redeployment of Resources EDITORS Anthony Manos is a catalyst with Profero, where he provides professional consulting services, implementation, coaching, and training for a wide variety of organizations (large and small, private and public) in many industries focusing on lean enterprise and lean healthcare. Tony has extensive knowledge of lean and quality in a wide range of work environments. He is trained and certified by the National Institute for Standards and Technology (NIST) U.S. Department of Commerce in all elements of lean manufacturing. Tony also is a lean champion for 5S Supply. Relying on his diverse knowledge of business, manufacturing techniques, and applications, Tony has assisted numerous clients in implementing a lean enterprise and lean healthcare. Over the past 10 years, he has helped over 150 companies in several aspects of lean implementation, including team building, standardized work, 5S workplace organization and visual workplace, quick changeover, plant layout, cellular, Kanban, total productive maintenance, kaizen events, and hoshin planning. Tony is an internationally recognized speaker and expert on lean and presents at several conferences a year. As an ASQ faculty member, he teaches a two-day course in lean enterprise and a one-day course on kaizen. Tony is the past chair of the Lean Enterprise Division of ASQ. He is a senior member of SME and a member of AME. Tony is coauthor of the book Lean Kaizen: A Simplified Approach to Process Improvement and author of many articles on lean and its allied subjects. He serves as an ASQ representative to the Lean Certification Oversight and Appeals Committee. Tony is Lean Bronze Certified and was part of the original team to develop the Lean Certification. Tony served in the US Navy nuclear propulsion program. He holds an MBA from the University of Illinois at Chicago. Chad Vincent is a lean manufacturing specialist and corporate operational excellence team member with Greif, Inc. in St. Louis, Missouri, where he provides professional guidance, facilitates implementation, and coaches and trains personnel at manufacturing facilities on lean enterprise and operational excellence. Prior to Greif, he worked as a quality engineer in the medical device field and as a project engineer in the construction industry; he also has worked in management in the logistics and transportation industry. Chad has served as a senior lead examiner and judge for the Governor’s Quality Award (Arkansas’ equivalent of the Malcolm Baldrige National Quality Award) and is past president of the Leadership Arkansas Alumni Association Board of Directors. Chad is an advocate for ASQ’s Socially Responsible Organization (SRO) Initiative and a member of SME’s Lean to Green Committee. He has written articles, such as “Back in Circulation” for Quality Progress, on the utilizing of lean to achieve socially responsible and environmentally favorable results within organizations and on defining the 8 Green Wastes for environment, health, and safety (EHS) professionals to apply lean in their areas of expertise. He is a voting member of the US Technical Advisory Group (TAG) for the ISO 26000 Guidance for Social Responsibility. Chad earned a BS in engineering management, specializing in quality engineering, from the Missouri University of Science and Technology, in Rolla, Missouri. He is a senior member of ASQ and SME, and is currently the ASQ Lean Enterprise treasurer and serves on the SME/AME/Shingo/ASQ Lean Certification Oversight and Appeals Committee. Chad is a CQE, CRE, CMQ/OE, and CSSBB, and he is Lean Bronze Certified. Module 1 Cultural Enablers 1.1. Principles of Cultural Enablers 1.2. Processes for Cultural Enablers 1.3. Cultural Enabler Techniques and Practices Culture is the widening of the mind and the spirit. —Jawaharlal Nehru The first section of the Lean Body of Knowledge is dedicated to culture. Although lean is about the tools, it is more about creating a culture of people who truly believe in continuous improvement. This portion of the book focuses on what it takes to create, change, and lead an organizational culture into operational excellence. There is no lean without people. This section explores the importance of leading with humility, showing respect for people, having a well-crafted plan with a sense of urgency, and developing the people and leaders in your organization. 1.1 Principles of Cultural Enablers A ccording to Pascal Dennis (2007, 145); author of Lean Production Simplified; “Intensity is the soul of lean production, and team members are its heart” In other words, people are the most critical element of lean production, and the culture the team members create is the major source of fuel required to propel lean systems forward in any organization. In a vast majority of cases, the success or failure of any lean, Six Sigma, or other corporate initiative will depend on the people who execute it rather than on any equipment, consultant, software, or other tools and techniques. Thus, organizations that consider people as the prime appreciating asset and invest adequate time, effort, and money in hiring and developing the right people will get unmatched results (Dalal 2011, 584). What Is a Culture? A culture is the sum total of all behaviors, relationships, comprehension, and interactions that fuel overall alignment via collective thoughts, words, and actions. What Is a Lean Culture? Lean is an approach to improve quality, increase productivity, reduce costs, and increase customer satisfaction by eliminating waste and creating value. A lean culture is the sum total of all the lean tools, techniques, and knowledge that exist within an organization at the root level and that fuel the overall organizational alignment via collective lean thoughts, words, and actions toward the elimination of waste and the creation of value. Organizations that have a strong lean culture do two things: 1. They promote at least five key cultural enablers (safety, standards, leadership, empowerment, and collaboration), which allows the lean culture to exist 2. They build their business on the core fundamentals of respect for individuals An Example of a Strong Lean Culture The consistent growth, prosperity, innovation, and operational excellence of Toyota are clearly results of the Toyota Production System (TPS), which is built on the foundation of a strong and dynamic culture and sophisticated “human systems” consisting of highly motivated and well-trained people in plants, dealerships, and offices around the globe. In Toyota Culture, authors Jeffrey Liker and Michael Hoseus (2008) explain Toyota’s fourstage process for building and keeping quality people: attract, develop, engage, and inspire. The “people-centric” culture of Toyota is carefully designed by:  Finding competent, able, and willing employees  Beginning the training and socializing process as they hire the people  Establishing and communicating key business performance indicators at every level of the organization  Training the people to solve problems and continuously improve processes in their daily work  Developing leaders who live and teach your company’s philosophy  Rewarding top performers  Offering help to those who are struggling (Liker and Hoseus 2008, 44) What Is a Cultural Enabler? Just as a sapling requires critical factors like the right soil, adequate sunlight, and water to survive and grow into a strong tree, culture requires factors that allow it to stabilize and pervade throughout the organization. These factors are known as cultural enablers. Cultural enablers are critical to the people on the journey of building a culture of operational excellence within an organization. What Constitutes as Cultural Enablers of a Lean Culture? Cultural enablers of a lean culture include the basic principles of safety, standards, leadership, empowerment, and collaboration. Basic Principles of Safety There are only two types of organizations: safe or lucky. Safety is the prime cultural enabler, as only safe environments can be productive and profitable. Lean organizations believe that merely adhering to all requirements of the Occupational Safety and Health Administration (OSHA) is not sufficient in order to have a safe working environment. The following two principles are engrained in the culture of lean organizations: 1. Safety is the responsibility of every employee within the organization 2. A proactive versus a reactive approach is required in order to create and maintain a clean, safe, ergonomic, and sustainable work environment Lean organizations realize that to attain all-encompassing safety standards, they must focus on education and awareness in safety practices related to people’s health and wellness, and interface with people and equipment and environmental aspects. Personal Safety Personal safety focuses on security and protection from accidents, injuries, fire hazards, equipment malfunction, and any other aspect threatening the health and well-being of every individual in the organization. Fatigue Prevention Fatigue results from a poorly designed workplace, work environment, tools, equipment, and policies and procedures. Practicing workplace ergonomics, which optimizes the comfort of employees while they are interacting with all the elements of their workplace, is the key to reducing fatigue and increasing employee efficiency. Environmental Safety Environmental safety involves reducing the carbon footprint of products and processes on the surrounding environment. It encompasses product and process design from cradle to grave, including use of environmentally conscious raw materials, supplies, and packaging materials requiring minimal transportation and minimal waste, along with proactive implementation of recycling or reuse programs. Some top enablers for creating a culture of safety are the following:  Focus of top leadership Organizational emphasis on safety Clearly defined organizational structure  Clearly defined lines of authority and accountability  Unambiguous communications  Trust and engagement  Ability of organization to learn from failures  Safety training and sharing of lessons learned Some top barriers for creating a culture of safety are the following:     Lack of support from top leadership Minimal emphasis or pseudo-emphasis on safety A culture of blame and retribution Lack of training or sharing of lessons learned Basic Principles of Standards Standards are baselines from which improvements can be easily measured. All standards related to safety, communications, operations, human resources, policies, procedures, and tasks need to be standardized across the entire organization. Standardization is not static but dynamic and requires continuous improvement using the Plan-Do-Check-Act model of the Deming cycle (ASQ). Taiichi Ohno is credited with saying, “Where there is no standard there can be no kaizen” Thus, a standard is “the best known method/process/system at a particular point of time” and is a dynamic point of reference that becomes the baseline for future improvements. Every continuous improvement activity must result in the establishment of a new standard. This “new standard” may require establishing a new standardized work sequence, recalculating takt times and establishing new inventory levels, updating visual work instructions, and setting new inspection or quality control standards. According to Masaaki Imai (1997, 54–56), author of Gemba Kaizen, standards have the following key features:  Represent the best, easiest, and safest way to do a job Offer the best way to preserve       the know-how and expertise Provide a way to measure performance Show the relationship between cause and effect Provide a basis for both maintenance and improvement Provide objectives and indicate training goals Provide a basis for training Create a basis for audit or diagnosis Provide a means for preventing recurrence of errors and minimizing variability Basic Principles of Leadership Without support from the top leaders and executives, lean initiatives cannot survive in an organization. The leader is not only required to support lean initiatives in good times but also required to show persistence and constancy of purpose during tough times. The leader needs to develop a clear vision for lean, communicate it effectively to his or her employees, and empower them to adopt it as their own mission. Thus, leadership is the key cultural enabler that determines whether lean is established as a culture in the organization. Good leaders understand that in an environment of continuous improvement, failures are imminent. But rather than blame people for failures, they ask “why” five times, approach the problem, and create a plan to strengthen the people (Dennis 2007, 130). According to Dalal (2011, 471–85), there are three types of failures: 1. System level failures 2. Process level failures 3. Human level failures Great lean leaders avoid focusing on the human level failures, as this would create an environment of fear, distrust, and a culture of risk aversion lacking creativity and innovation. Instead, great lean leaders:        Focus on system failures (“why”) Spend more time to prevent the failure Believe that 80% of the failures are avoidable by 20% of planning Perform root cause analysis to prevent failures Implement dynamic risk assessment to identify and plan for failures Use Plan-Do-Check-Act cycle to prevent failures Establish a creative and open environment for lessons learning (Dalal 2011, 471–85) Figure 1.1-1 shows a representation of an empowered culture of trust created by leaders using these techniques. Basic Principles of Empowerment A Japanese saying alludes to the fact that a statue of Buddha will not mean much without putting a soul in it (Imai 1997, 242). The soul of a lean organization is employee empowerment. The prime responsibility of a leader in a lean organization is to develop effective problem solvers and decision makers. The only way a leader can achieve an empowered workforce is by helping to set a vision and relinquishing some authority in order to allow the capable employees to make decisions and influence corporate policies. Empowered employees get to the depths of understanding of lean technology and go beyond the know-how of lean and experience and apply lean with a deeper understanding of the know-why. Thus, lean leaders rely on their empowered employees to optimize the benefits of lean initiatives, ensuring superior levels of customer satisfaction. Employee empowerment must be done in six steps: Step 1: Leaders make a commitment to have an engaged workforce Step 2: Roles and responsibilities are clearly defined Step 3: Training is conducted for managers, supervisors, staff, and shop-floor personnel Step 4: Training is conducted for all administrative and support staff Step 5: A formal idea-suggestion or idea-sharing program that involves all employees is implemented Step 6: Action is taken to assign responsibility and accountability Basic Principles of Collaboration The cultural enabler “collaboration” is the backbone of lean. Lean initiatives do not depend on the knowledge of one but achieve breakthrough results due to the deployment of the collective wisdom of many. In lean organizations, collaboration exists across:  Various functions  Different departments  Staff and union workers and even between executives and operators Collaboration and partnerships extend beyond the four walls of the organization and include suppliers, contractors, and, in some cases, competitors. By design, lean tools allow for a collaborative culture throughout the organization. Nemawashi, A3 form, kaizen events, and several other lean tools are designed for automatic collaboration. 1.1.1. RESPECT FOR THE INDIVIDUAL One of the most critical aspects of lean cultures is the inherent importance placed on valuing individuals and treating each individual with dignity. In lean organizations, respect starts with the top leaders and permeates throughout the organization. However, “respect for every individual” does not end at the four walls of the organization; rather, it extends to all customers, suppliers, and stakeholders, including the community in which the organization does business. Respect allows the lean culture to achieve the following goals:  Create a culture of cohesive teamwork Create a culture of continuous improvement Increase employee involvement  Empower employees  Encourage diversity A key requirement and an underlying quality required by employees of lean organizations is humility. Leaders and employees all practice humility as a technique that allows the process of continuous improvement to go on via open collaboration. In lean cultures, everyone is open to learning from one another and to raising their game incrementally on a daily basis in order to generate superior value and increase customer satisfaction. The key traits of a humble environment are as follows:      An open learning environment People form a critical element of the value stream A long-term relationship based on mutual loyalty A mentor-mentee, sensei-student relationship throughout the organization Lack of discrimination throughout the organization and the entire supply chain Thus lean organizations and their leaders focus on operational excellence via a peoplecentric approach by ensuring an empowered, safe, and collaborative environment based on standards and a philosophy of a wholehearted pursuit of long-term excellence. 1.1.2. HUMILITY Humility leads to strength and not to weakness. It is the highest form of self-respect to admit mistakes and to make amends for them. —John J. McCloy Humility ties in directly with respect for the individual (see Section 1.1.1, “Respect for the Individual”). Humility is considered the quality of being modest, unassuming in attitude and behavior. It also can be taken as feeling or showing respect and deference toward other people. Don’t think of humility in the lean sense as being meek, shy, and timid or of lesser value. Of course, the opposite of being humble is being arrogant, overconfident, condescending, or egotistical or displaying hubris. Humility is a principle that enables the people in your organization to learn, improve, and excel. Consider two types of humility: personal humility and leading with humility. This approach helps us understand what it takes to develop our own personal style, along with the similarities and differences in leading people. Personal Humility Personal humility can be thought of as having pride (not boastful), self-respect, and dignity. These traits are created over the years with a commitment to integrity, honor, and pursuing lifelong learning. Being humble means that you understand that you don’t know everything and can continually learn from those around you. As you learn, you improve. This also involves understanding your strengths and weaknesses. Understanding your strengths allows you to be a better team member, as you bring certain skills to your workplace. Appreciate your weaknesses (or opportunities for improvement) so you can continually develop and progress as a person. Another important role of humility includes being able to accept personal responsibility for your actions. Admit when something doesn’t go as planned. Hansei is a Japanese word that means “self-reflection” or to acknowledge a mistake and pledge to improve. It is perfectly acceptable to say, “I don’t know; let’s find out” Humility also includes being authentic to yourself and to others and staying true to your principles or virtues. Another important skill for fostering humility is to perfect your active listening skills and be present for the other person. Humility is also being mindful of others, in your thoughts, speech, and actions. In Stephen Covey’s The 7 Habits of Highly Effective People (1989, 235), habit 5 says to “seek first to understand, then to be understood” This is a classic example of showing your humility. By reserving your desire to jump in, speak up, and be heard and truly trying to understand the other person’s point of view you create a better relationship and find overall solutions to problems. In a way, humility can be thought of as living by the golden rule: Treat others as you would like to be treated. This leads to workplace satisfaction and gratification of a job well done. Leading With Humility Leading with humility is not only for the CEO or the president of your organization. Leading with humility should permeate all the way through the ranks to the level of the value-adder. At any one time, everyone has a chance to lead, from daily meetings or training to large-scale projects. Gary Convis (2011) tells of his mentor at NUMMI, Kan Higahsi, telling him his greatest challenge would be “to lead the organization as if I had no power” This is a sure sign of humility. In his book Good to Great, Jim Collins (2001) talks about Level 5 Leadership, of having personal humility and professional will. Table 1.1.2-1 shows a summary of Level 5 Leadership personal humility traits, adapted from the book. Leading by Deeds Building trust to become trustworthy as a leader starts with personal humility. Building trust can take time. Your words and actions demonstrate your ability to do what you say. An example of this is a leader who says that the customer comes first but then makes it difficult for the customer to contact him or her making the customer search a website for a telephone number or navigate lengthy phone menus that lead nowhere. As a humble leader, you will need to know how to be patient in developing your people. While there are always deadlines, proper planning, tapping into the creativity of your employees, and having the patience to stay the course will pay off dramatically as you create a more engaged workforce. Always make sure to give credit to others for their contributions to the success of the organization, and take personal responsibility for any letdowns. Learn how to shine the spotlight on others; let them shine in the eyes of the company. If you can learn how to talk to the CEO and the value-adding worker in the same way, you are developing the type of skills that will make you invaluable to your institution. As a leader, design your systems with respect and humility. Dwight Davis (2011), associate vice president of Utah State University, on the topic of leading with humility, says, “Humility is a key element in building teams, unifying organizations, unleashing employee capabilities, optimizing relationships, designing systems of accountability and achieving a culture of discipline. Humility simply enables individual and organizational learning and improvement” We come nearest to the great when we are great in humility. —Rabindranath Tagore REFERENCES    ASQ. “Project Planning and Implementing Tools” http://asq.org/learn-about-quality/project-planning-tools/overview /pdca-cycle.html Collins, Jim. 2001. Good to Great. New York: Harper Business. Convis, Gary. 2011. “Lean Leadership: The Toyota Way” Keynote speech at the AME       conference, Dallas, Texas. Covey, Stephen. 1989. The 7 Habits of Highly Effective People. New York: Simon and Schuster. Dalal, Adil. 2011. The 12 Pillars of Project Excellence: A Lean Approach to Improving Project Results. Boca Raton, FL: CRC Press. Davis, Dwight. 2011. “Lead with Humility, Respect Every Individual” Gemba Walkabout blog, October 17. http://gembawalkabout.tumblr.com/post/11595991420/lead-with-humility-respect-every-individual Dennis, Pascal. 2007. Lean Production Simplified: A Plain-Language Guide to the World’s Most Powerful Production System. 2nd ed. New York: Productivity Press. Imai, Masaaki. 1997. Gemba Kaizen: A Commonsense, Low-Cost Approach to Management. New York: McGraw-Hill. Liker, Jeffrey, and Michael Hoseus. 2008. Toyota Culture: The Heart and Soul of the Toyota Way – New York: McGraw-Hill http://www.lean.org/BookStore/ProductDetails.cfm?SelectedProductId=270 1.2 Processes for Cultural Enablers J ust as there are principles for cultural enablers, there are also processes. These processes are the ongoing systems and inherent culture of the organization as it continues to improve itself. 1.2.1. PLANNING & DEPLOYMENT There is an old saying that poor planning guarantees poor execution. It’s actually quite shocking how little time and effort companies put into planning their lean implementation. The more common approach is to simply choose a convenient tool, 5S being the most popular (see Section 2.2.1.1, “5S Standards and Discipline”), and apply it with a broad brush across the organization. Certainly this approach can have some positive results, but it is neither sustainable nor comprehensive. Good planning doesn’t guarantee good execution, but it gives you the best chance of success. Also, there should not be a “one plan fits all” approach. Every lean implementation should be designed on the basis of specific objectives and characteristics of the particular organization. Additionally, every plan should include at least three basic pillars as the foundation (see Figure 1.2.1-1). The first pillar is “quick and measurable improvement” It is obvious that the primary objective of any lean transformation is to significantly improve the performance of all critical measures. Lean isn’t implemented because it’s the nice thing to do for the business; it’s implemented because it is the right, and sometimes critical, thing to do for the business. Experience suggests that if the lean implementation is not providing significant returns in key performance indicators in the first 12–18 months, someone (usually in finance or accounting) will challenge both the relative effectiveness and the need for lean and decide that resources might be better spent elsewhere. Quick results can be achieved through kaizen events (rapid process improvement), targeted lean demonstration projects, or even some basic tool implementation aimed at quick wins. But be cautious that these relatively quick and measurable wins can become a crutch that limits further lean transformation. Be careful of your transformation becoming what is called “event lean” The second pillar, and absolute complement to the first pillar, is the development of a lean culture, embedding lean into daily behaviors. Culture is about shared and common principles, practices, and behaviors that will ultimately determine outcome. There is a very simple formula for pillar number two: principles (thinking) drive behaviors, behaviors drive action, and action drives results. Simply put, the desired thinking will get the desired results. There are two ways that lean thinking can be embedded into the organization. The first is through continued repetition. The messages and experiences simply cannot be repeated enough. Remember how you learned the multiplication tables in school? It was all repetition and it stayed with you for life. The second is through application. A principle or practice must be aggressively applied and applied in varying environments if there can be any expectation of embedding the behaviors. This can be accomplished by taking a slice (inch wide/mile deep) of the organization and deeply immersing it in the principles and practices of lean. Then, based on the lessons learned, expand throughout the organization, slice after slice. The third pillar is the principle of lean leadership. The decision makers in the organization, regardless of level, must be engaged in the lean transformation. This means they provide the direction, participate in the lean activities, provide some of the education, create the tension and need, and certainly exhibit the desired behavior. This can be accomplished through active engagement of leadership in the lean activities and by establishing some sort of lean management structure similar to a steering committee or leadership council. Ideally, the three pillars are implemented simultaneously, but this can be difficult to achieve, as identified in the next section. Any lean transformation requires, or should require, a framework for the implementation. Lean is a journey, and as with any journey, you need a roadmap (see Figure 1.2.1-2). Your roadmap’s route should be based on a series of issues and concerns that must be considered. A few examples include:  Business conditions; If the business is just trying to survive, you can forget culture. Just get quick results.  Baggage; Prior experiences cause people to carry around thinking that might affect implementation. For example, a prior failed continuous improvement implementation can create “program of the month” baggage.  Resources; The availability, or lack thereof, of resources to support the lean transformation will affect the pace of the implementation. Be very cautious of managing expectations.  Culture; A risk-adverse culture require assurances and safety nets. A frugal culture will require proof of return on investment. These and any other issues and concerns must be considered when developing the roadmap. Also consider designing the roadmap in phases and defining each of the following characteristics in each phase:         Objectives Application Education Tools and methods Communication Infrastructure Leadership Expected results The roadmap should be developed with three levels of varying detail. Level one generalizes the content of the roadmap for communication across the organization. It’s like a map that shows only the major cities and primary roads and thus has lots of white space. Level two provides enough detail for the area/department or even the entire organization to assess where it is on the lean journey and what it must do to advance. This is like adding the small towns and secondary roads to the map and provides more guidance and options. Level three is very detailed and provides the specifics for active implementation. This is like adding all the cities, towns, and communities and all the primary, secondary, and tertiary routes to the map. I can’t stress enough how important it is to develop a roadmap. A very well-known Fortune 500 company often benchmarked for its lean implementation openly admits that it did not develop a roadmap but should have. The company is developing one now after what it considers three false starts. How many false starts can you afford? 1.2.2. CREATE A SENSE OF URGENCY Creating a sense of urgency can be difficult in good times but is typically easy in bad times when the economy or business conditions are threatening survival. Futurist Joel Barker, in his video Tactics of Innovation, discusses five pairs of tactics to get someone to accept a new idea. In the video he makes it very clear that, when things are tough, the only tactics you need are Upside/Yes (there is a lot to be gained) and Downside/No (there is little to no risk). In tough times, it’s easy to get people to change just show them the numbers. However, most lean practitioners and leaders will be challenged to create a sense of urgency in an organization when it is doing well or when the employees believe that the organization is doing well. The real challenge is to overcome the belief that an organization needs to improve and improve significantly. Beliefs are embedded in the thinking of the organization. The way to change these beliefs is by building tension in the organization. Tension is not the same as stress. Whereas stress suggests a feeling of helplessness, tension is about recognizing the gap between where you currently are and where you would like to be. Very simply put, tension is about having a deep understanding of the current state and a well-defined vision of the ideal state. Tension can be used to improve a task, an entire process, or even an entire company by narrowing the gap. It all starts with a deep understanding of the current state. There are several means to both understand and document the current state:      Value stream mapping Detailed process mapping Direct observation Videotaping Data collection Regardless of the method used, the key is to understand the real current state not what is desired, not what is documented, but what is real. It is surprising how organizations almost always feel that their current state is better than what is discovered. One of the simplest means to relieve tension, relieve the sense of urgency, is to believe that things are better than they actually are. It’s simple but not helpful. Deeply understanding the current state is only half the formula. The other half is having a well-defined vision of the ideal state. Notice I did not say future state. Future states are simply intermediate gains. The ideal state is a step gain. There may be one or even more than one future state as you move toward ideal, but you must never lose sight of ideal. For example, one company may try to figure out how to fasten a nut and bolt faster (future state), while another company is trying to eliminate the need for the nut and bolt altogether (ideal state). On the surface it may sound difficult to define the vision of an ideal state, but it is actually quite simple. Simply develop a bulleted list of the ideal characteristics of an activity, a process, a department, or even a company. The only restriction is that it must be possible. You can’t violate the laws of nature or science. For example, one consumer goods company defined the ideal state for its warehouse receiving process as:       100% quality incoming parts Correct count (standardize lot sizes) Containerization (direct to line) Radio frequency Bar coding Just-in-time Nothing in the aforementioned ideal-state description is not possible, maybe very difficult but possible. For example, getting 100% quality from a supplier may be very difficult, but it is not outside the realm of possibility. Also, cost should never be considered when defining the ideal state. It might be a barrier that prevents achieving ideal, but it does not make the ideal state impossible. The likelihood of achieving the ideal state is low, especially because ideal is often a moving target. However, if you do not focus on the ideal, you will not make the big step gains, only incremental small gains. Remember, there may be one or more future states as you move toward ideal. A deep understanding of the current state and a well-defined vision of the ideal state will expose the organization to the gap and therefore create the tension, the sense of urgency. The next challenge is to simply identify and remove the barriers to achieving the ideal state. You will most likely not remove all barriers, but the more barriers you do remove, the closer you get to ideal. So, in summary, if you want to create a sense of urgency, follow these three simple steps: 1. Deeply understand the current state 2. Clearly define the ideal state 3. Narrow the gap between steps 1 and 2 1.2.3. MODELING THE LEAN PRINCIPLES, VALUES, PHILOSOPHIES Webster’s dictionary defines modeling as “to display by wearing, using or posing” That could not be a better definition for modeling lean. You must use it both in your professional practice and in your personal practice, and you must wear lean on your sleeve for others to see. It is about exhibiting through action and dialogue the lean thinking and behavior desired of others on a lean journey. Actions always speak louder than words, but both are in their own way a means to model lean behaviors. Waste elimination is the lifeblood of any lean implementation. It’s not enough to ask others to surface waste and then simply support their activities. Every individual, regardless of his or her level in the organization, must be involved in waste elimination. This means that every individual should be performing waste walks routinely and frequently. Develop a standard form for documenting the identified waste and a standard process for providing feedback or entering the suggestions into a structured waste elimination system. Waste walks can be done individually or in teams. It’s preferable, however, to do the waste walks in cross-level and cross-functional teams for two reasons. The first reason is the obvious visibility. The second reason is the opportunity to dialogue. In fact, you will find that the real value and opportunity to model lean is not in the actual application of lean tools (waste walks, 5Ss, process maps, etc.) but in the dialogue that is required to plan and implement the tool. You must be a teacher. Simply subrogating the teaching, either formally or informally, to others is unacceptable. This doesn’t mean just standing in front of a classroom. The transfer of skills and knowledge is too important not to share on a daily basis. While this can be about actually scheduling time to teach, it’s more about taking advantage of situations that could be teaching moments. It might be helping to solve a problem, implementing a tool, resolving a crisis, or responding to any other situation that is a candidate for a lean solution. These teaching moments occur routinely in the daily practices of the organization. You can’t expect a signal (andon) when a teaching moment surfaces. You must seek out these opportunities. There must be an environment for learning. The lean transformation will require experimentation, action, and new thinking. In many cases these activities may involve risk. The challenge is to create an environment to encourage and support experimentation and new thinking. Learning occurs when people are asked to step out of their comfort zone. This doesn’t mean chaos and unorganized change. Stepping out of the comfort zone must be purposeful by setting clear goals and providing effective mechanisms. When people step too far out of their comfort zone, they enter their fear zone. So, in addition to minimizing their comfort zone, you must also eliminate fear. You must provide physical, emotional, and professional safety. If an individual is ridiculed for making a suggestion, you can fully expect that he or she will not venture beyond his or her comfort zone. Regardless of the validity of the idea, it should be a teaching and learning moment, not a moment of embarrassment. Simply proclaiming support of the lean transformation is not enough. Both active and visible participation are required. Support is easy; participation is far more difficult. Back in the early 1990s one of the big three auto companies had its first kaizen event. A member of that kaizen team was the president of the company. He was in jeans and a company Tshirt and came ready to do whatever was asked of him that entire week. Twenty years later that experience still resonates through the organization, even though that president is long gone. The right “model” is not about watching from the sidelines; it’s about active engagement. It’s about committing the time to actively participate. Maybe it is waste walks as mentioned earlier. Or it could be a kaizen event, problem solving, building process maps, or implementing lean tools. This is certainly a case where actions speak louder than words. Lean must also be part of everyone’s daily activities. It is not about others applying lean. It’s about every individual applying lean to his or her self. It’s about individuals aggressively applying lean to daily job functions by developing clearly structured processes for how they perform work and how they spend their time. This can manifest itself in many ways. Performing 5S in your own area is an obvious and simple answer, but it is far more comprehensive than that. Is there scheduled and structured time for reflection? Do you follow a structured problem-solving model? Do you look for the opportunity and the time to teach or coach others? Do you schedule certain critical activities and never vary? Are you auditing the lean implementation? There are likely many more examples of how individuals can model lean principles, values, and philosophies, but it all comes down to two things: (1) exhibit the behavior you desire of others and (2) encourage and participate in the dialogue to develop lean thinking. 1.2.4. MESSAGE DEPLOYMENT-ESTABLISHING VISION AND DIRECTION In their book, Fail-Safe Leadership, Martin and Mutchler (2003) use the analogy of a game of tug-of-war. In this game, two teams are placed at opposite ends, each holding one end of a rope. The objective is to pull the middle of the rope over a line. On one side, the team members are lined up and ready to pull in the same direction. On the other side, the team members are disorganized and ready to pull the rope in different directions. Which team do you think will win? Obviously the team that is aligned and pulling in the same direction will win. What does this have to do with message deployment? Everything! It all starts with the development of the vision, or direction, for the organization. More specifically, in the context of this handbook, what is the vision of the organization’s lean system? What will be the driving force? Perhaps it is. “To eliminate waste and improve customer focus” Or, “To align our processes with the customers’ needs and eliminate waste, while achieving Shingo recognition” The message has to fit your organization. To achieve any vision, the organization must be aligned. One obstacle typically encountered on any lean journey is the fear that doing things right the first time and faster will result in cutbacks or layoffs. The emergence of this fear is a direct result of the vision and message deployment. The lean vision should not focus on the reduction of personnel but rather on the leveraging of those resources now available to grow. Growth can be in skills, new product lines, reduced overtime, and so on. Martin and Mutchler (2003) prescribe clear methods to achieve fail-safe leadership, but key to lean is the alignment described as ensuring that, top to bottom, every employee understands the vision and has goals that directly relate to results. Their model is shown in Figure 1.2.4-1. In the lean journey, this approach, or a similar approach, will ensure that the organization is aligned and that all functions are striving for the same results. The vision is established at the top and communicated across the organization through meetings, webinars, and webcasts or by any other effective means. Be wary of just making posters, hanging them up, and expecting the vision to be achieved this is not communication or message deployment. Allowing for personal interaction and holding question-and-answer sessions will help with alignment. After the vision is defined, strategies, goals, actions, and measures are established. Measures are not always needed and are typically driven by the organization’s culture and size; however, they are helpful in ensuring alignment and fact-based decisions regarding progress. These are established at a level where they are functional to personnel and need to be reviewed to ensure they do not conflict – remember the tug-of-war – from one function to the other. For example, a facility may want to lower electricity costs by shutting down the lights and the heating system at night, but production may want to operate some machines at night to perform maintenance. Personnel will establish goals and actions that align with functional goals and strategies (critical success factors). To achieve this message, deployment has to occur not only for the vision but also for the functional level, after strategies and functional goals or actions are reviewed to ensure there are no conflicts with other functions. This is an investment in time and energy that pays rapid dividends through everyone pulling the rope in the same direction at the same time. Developing the vision at the top, then, involves more levels as each successive item that works in the organization is defined. In other words, don’t change how you do things to fit the model above, but use the model within the organization’s system to ensure alignment and results. Involve appropriate subject matter experts and formal and informal leaders to define the functional goals, actions, and measures. Communicate the overall vision and functional goals to all levels. Ensure each person has goals and actions (one to three is the norm) that align with the overall vision and the function in which he or she works. Check and communicate progress regularly and make adjustments when necessary. Use the checks to ensure continued alignment. Stress the importance of achieving the vision and the benefits. Commit to the lean journey and ensure that it has little or no impact on staffing levels and that it is used to grow skills, people, and business results. 1.2.5. INTEGRATING LEARNING AND COACHING To help the organization shift to a lean culture, learning and coaching must be part of the equation. Learning allows for the sharing of knowledge, personnel growth, removal of barriers, and the demonstration of leadership commitment. Coaching is a method used to enable learning and improvement. Integrating these into the planning and deployment, along with sustainment, provides continual benefits through improved morale, execution, idea generation, and retention. All personnel, from individual contributors to executive leadership, must be involved with the learning process. A key concept of learning is to ensure continual application of the knowledge gained. In other words, once personnel learn a skill or gain knowledge, there should be an established expectation that that skill or knowledge is applied regularly in support of organizational and lean objectives. As part of the lean culture shift and integrated learning, there will be formal and informal learning. Formal learning includes goal setting, teaching or facilitation (classroom, webbased, etc.), verification of knowledge gain (completion of exercises, case studies, testing, projects, etc.), and reinforcement of knowledge gain (a knowledge check following completion of the learning experience). Informal learning includes on- the-job training and coaching and mentoring. Formal learning is structured to account for adult learning styles and needs. A formal learning process includes the following:      Stated objectives Lesson plans Formal verification of knowledge gain Knowledge check Optional qualification or certification Lean Bronze Certification, through the Society of Manufacturing Engineers (SME), the Association of Manufacturing Excellence (AME), the Shingo Prize, and the American Society for Quality (ASQ), is an example of formal learning. Organizations develop their own formal learning with a focus on their implementation of lean. Learning is usually broken down to meet different objectives of awareness, execution, project leadership, and program design. This learning may also include subsets within execution and project leadership based on the expectation (e.g., Lean Bronze, Silver, and Gold or Six Sigma Green Belt, Black Belt, and Master Black Belt). Not all learning is performed at one time, nor is all learning developed at the same level of difficulty, time invested, and length of course. As the lean culture shift starts, all personnel receive lean awareness training, but those leading the initiative receive more in-depth training. Lean awareness training explains the organization’s goals of lean, leadership’s commitment, what will occur, how it impacts personnel, expectations for personnel involvement, top-level training, deployment schedules, and so on. This awareness training should emphasize that the goal of a lean culture is to execute smarter, eliminate waste, and grow skills and capability it is not intended as a program that reduces the workforce. Reduction in personnel is typically a major workforce concern, and thus leadership must emphasize that it is not a goal or intention. In formal training, on-the-job training is done at the lowest levels possible. It usually has top-level goals (e.g., ensure new hire can operate machines in work area effectively and efficiently) but no set agenda, timeline, and so on. It may have some level of competency testing, but it is usually completed when the trainer believes the trainee is able to execute correctly, safely, and efficiently. In formal training, that critical knowledge transfer from one employee to another is something lean wants to leverage throughout time. Every person executing an activity, working with a tool or machine, or dealing with a process knows what works well and what doesn’t. They know the value-added activities and waste (muda). The ability to tap into this knowledge, especially during area lean blitzes or kaizen events, is crucial to success and sustainment of changes and gains. If this knowledge is not captured, leveraged, and utilized once the blitz or kaizen event is done, personnel will revert to their way of doing things. Additionally, understanding how things are really done will help the organization make effective changes and improve worker safety. Coaching generally uses a nurturing approach to achieve an end goal. Good coaches keep the end goal in mind at all times; they recognize that there will be setbacks and know how to overcome them. When a setback occurs, a coach will assess the situation; adapt with small, incremental change (usually); and then guide the team to overcome the challenge and succeed. Coaching relies on the ability to communicate and motivate, ensuring that “leanspeak” can be translated so that all involved understand. Coaching utilizes formal and informal leaders within the organization to ensure acceptance of the lean culture shift. The coaching method engages employees, improves performance, and reduces the effort needed to implement and sustain lean. Learning and coaching are vital cultural enablers for lean. Learning ensures that personnel gain knowledge, apply the knowledge gained, and retain the knowledge, and it lays the foundation for culture shift and lean execution. Coaching reinforces learning, elevates employees to perform, and leverages personnel throughout the organization to adapt and embrace the culture shift and drive improvements to perform effectively and efficiently. 1.2.6. PEOPLE DEVELOPMENT-EDUCATION, TRAINING & COACHING What does the organization do if it has a goal to penetrate a new product line or market? One method is that the organization first learns about that product line or market and then determines how to best leverage its performance to differentiate and penetrate that product line or market. This is an example of education, training, and coaching. In lean, people development through education, training, and coaching is a key cultural component. Education can be formal or informal and external or internal to the organization. Training is also formal or informal and is usually internal to the organization or leverages external training that aligns with the organization’s goals and lean system. Coaching leverages the education and training to guide people to achieve the desired results. Education can take the form of degrees, courses, or certifications offered by external organizations like community colleges and universities or specialized organizations like ASQ and SME. Education is available in lean, components of lean, quality, and the like. In most cases, education involves a broad scope of the entire lean or functional area with depth in most, if not all, aspects of the area. Formal education is a needed investment for subject matter experts, especially those who will guide the organization and serve as coaches. Training, on the other hand, is usually broken down into smaller aspects of lean. It begins with a top-level overview provided to the entire organization to achieve the alignment needed (see Section 1.2.4, “Message Deployment Establishing Vision and Direction”). Then, more specialized training is available, or required, on the critical aspects of lean. The overview ties to the organization’s vision and provides a high-level look at what lean is, how it works, what are its goals and objectives, and how people are engaged and contribute. Specialized training is used to expand on lean principles and tools like value stream mapping and 5S. Specialized training is targeted to those involved with implementing the associated principles and tools to achieve the desired results. Training can include training within the industry and on-the-job training. Coaching is more personal. It is provided by subject matter experts and leaders when and where needed. It may be to help get past a roadblock or to supplement skills where training is not available or needed to execute on a regular basis. For example, coaching may be done to help a team apply a lean principle or tool not ordinarily needed, and thus each individual does not need the training and ability to execute that specific principle or tool on their own. Coaching can also be used to make adjustments in execution to drive alignment. Personnel development through education, training, and coaching provides everyone in the organization with needed skills enhancement and knowledge at the right time to ensure alignment and provide the foundation to achieve the desired results. 1.2.7. MOTIVATION, EMPOWERMENT & INVOLVEMENT Education is not only important to a lean transformation, it’s critical. However, a common mistake that organizations make is that they provide the education (the how) before they provide the purpose (the why). It is difficult to motivate individuals to accept a new idea, and especially difficult if they don’t first understand the purpose or the value of the new idea. Most people will not accept what they don’t value unless they do so only on blind faith. For example, a common lament is how difficult it is to sustain 5S. This is because most people believe the purpose of 5S is only about housekeeping and therefore is not seen as very valuable. What they don’t realize is that the real purpose is the ability to see abnormal conditions and subsequently eliminate waste. They can see a lot more value in 5S when they understand the purpose, the why. Understanding the why establishes the value. There are five phases to any change initiative: Phase I; Enlightenment. This is simply about establishing the purpose the “why” before you provide the education. You can teach a new skill, but getting someone who doesn’t see its value to use it will happen only by demand, not by desire. Phase II; Education. This is self-explanatory. It’s providing the “how” Providing someone with how to do or to accept something without first providing the why will likely diminish the chance for success. Phase III; Empowerment. Once individuals know why and how, you must give them a chance to really learn through application and experimentation. Very important: Never have anyone assume new responsibilities before first providing him or her the skills. Empowerment requires the development of skills and/or knowledge first. Phase IV; Experience. Empowerment provides the opportunity for multiple experiences, and subsequent multiple experiences will develop the expertise. Phase V; Enrichment. This simply means “results” Any change initiative that follows the first four phases can fully expect to get the desired results. As mentioned earlier, education is critical. Phase II is all about education. However, effectively transferring skills and knowledge can be difficult. A proven approach to effective education is “learn, apply, and reflect” Every educational experience should go through these three steps; some cases require more than one cycle. 1. Learn. Individuals must be provided the knowledge and skills required to achieve the desired expectations. 2. Apply. Knowledge without application will not be internalized. Adults in particular learn far better through app…
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Construction Law Engineering Worksheet

Construction Law Engineering Worksheet

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CM 354 Construction Law Name: Home Work Assignment #2 Chapter 2 & 4 Due 4/30 FIRST OF CLASS 1. An Owner contracted with a General Contractor to renovate the first floor of his three-story building. Half way through construction the Owner asks the Contractor that if he would remove the carpet of the second floor at no additional cost during the removal of the carpet of the first floor then the Owner would offer to allow the Contractor the opportunity to provide a cost for the second-floor remodel without a second bidder. What should he do? 2. You are awarded a contract to remodel a space including the replacement of all the doors with new. The existing doors are all painted wood doors. The plans call for all the doors to be replaced with wood doors. During the submittal process the Architect rejects your door submittals and says that the doors are not to be painted but should have wood veneer and be lightly stained. The cost from your door subcontractor to make this change is $25,000. Both the Architect and Owner tell you they will not pay for this because you, the contractor, never stated in your offer that the door replacement would be “paint grade”. What should you do? 3. You are contracted to build 8-foot high block wall 100 feet long in the location identified on the plans. While digging the footing the Owner comes by and asks if you could extend the wall another 10 feet and asks you approximately how much it will cost. You give him an estimate. He says go ahead. But later in the Owner decides he does not wish to spend the extra money but forgets to tell you. After you build the wall with the extra 10 feet you ask for a change order. The Owner refuses saying he never actually signed a change order from you. Do you have a legal right to demand payment?
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