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Subject: Ethics in engineering

School Tech (ST) is a company specialized in schools and universities furniture design and development. ST is requesting from their engineers to design a new classroom chair for students. The following statement is describing the new chair design: ST Company is in need for a design of new classroom chair. The new chair requirements are based on recommendations of company sales representatives when dealing with different customers and users. The ST requirements can be described as follows; low impact and effect on user (max importance), practical (least important), and lightweight (medium importance). A low impact and effect on user would mean having a minimum pain or uncomfortable feeling on user's back and seating position. A practical chair design would be suitable for different studying positions, flexible seating arrangements, and can be used with different students' sizes?. Three design alternatives were proposed for the new chair design and will be compared with the current design used by most schools. However, ST emphasis on chair color which should be uniform and within two preferred customers colors, which are gray and light blue. ST is requiring developing a chair concept considering ideas presented in Google Patents and Educational Supplies Trade Magazine. The user seating area is calculated based on the average user physical need and should be 60 cm X 50 cm X 2 cm (thickness). The chair seat initial selection of materials is determined to be made of polypropylene seat and back. Chair legs are handmade using chrome alloy materials and wheel from synthetic nylon materials with and wheel diameter determined to be 3.5 cm. The chair seat should be made through a special hand process to ensure the quality of the chair and reduce the potential negative impact on health. The chair is tested using 3D computer simulation using different number of users positions and conditions. The chair testing shows a maximum bearing weight capacity of 100 kg. No right-angle edges should be used in this chair or glued pieces. The chair manufacturing process can be completed mainly by machines and will be based on the 3D- drawings presenting all chair details dimensions. C1-D - Table 1 - Simplified Design QFD Tool Points (9) Hint: Some requirements is related directly to some specifications. For other specifications, think about the effect of provided specification on the given requirements. For example: if using joints in the chair, this would make chair more practical but heavier not with lightweight. Assume Only One Design Alternative Possible Design Specification Importance to design (Use 1(low) to 5(High) Spec 1 Spec 2 Spec 3 Design Requirements or Customer Need Specifications or Engineering Characteristics (Use: 1 - Low, 3-Medium, 9-High) Req 1 Req 2 Req3 Row Score Relative Weight (%) Rank Order C4-B Concept Hint: Use the design requirements given in the case to decide which design concept should be Selection selected for this case ? Assume Concept 1 is given in Figure 9, Concept 2 in Figure 10, and Concept 3 is shown in Figure 11. Compare chairs given in Fig 9-11 to see which one would Selection MATRIX satisfy given design requirements. List Importance Design Concept Design Concept Design Concept Customer's weighting factor 1 2 3 Points Requirements or (1-5, 1 = least, 5 (Assume given in (Assume given in (Assume given in (9) other criteria = max) Fig 9) Fig 10) Fig 11) Instructor comments or feedback Weighted Total Rank Order School Tech (ST) is a company specialized in schools and universities furniture design and development. ST is requesting from their engineers to design a new classroom chair for students. The following statement is describing the new chair design: ST Company is in need for a design of new classroom chair. The new chair requirements are based on recommendations of company sales representatives when dealing with different customers and users. The ST requirements can be described as follows; low impact and effect on user (max importance), practical (least important), and lightweight (medium importance). A low impact and effect on user would mean having a minimum pain or uncomfortable feeling on user's back and seating position. A practical chair design would be suitable for different studying positions, flexible seating arrangements, and can be used with different students' sizes?. Three design alternatives were proposed for the new chair design and will be compared with the current design used by most schools. However, ST emphasis on chair color which should be uniform and within two preferred customers colors, which are gray and light blue. ST is requiring developing a chair concept considering ideas presented in Google Patents and Educational Supplies Trade Magazine. The user seating area is calculated based on the average user physical need and should be 60 cm X 50 cm X 2 cm (thickness). The chair seat initial selection of materials is determined to be made of polypropylene seat and back. Chair legs are handmade using chrome alloy materials and wheel from synthetic nylon materials with and wheel diameter determined to be 3.5 cm. The chair seat should be made through a special hand process to ensure the quality of the chair and reduce the potential negative impact on health. The chair is tested using 3D computer simulation using different number of users positions and conditions. The chair testing shows a maximum bearing weight capacity of 100 kg. No right-angle edges should be used in this chair or glued pieces. The chair manufacturing process can be completed mainly by machines and will be based on the 3D- drawings presenting all chair details dimensions. C1-D - Table 1 - Simplified Design QFD Tool Points (9) Hint: Some requirements is related directly to some specifications. For other specifications, think about the effect of provided specification on the given requirements. For example: if using joints in the chair, this would make chair more practical but heavier not with lightweight. Assume Only One Design Alternative Possible Design Specification Importance to design (Use 1(low) to 5(High) Spec 1 Spec 2 Spec 3 Design Requirements or Customer Need Specifications or Engineering Characteristics (Use: 1 - Low, 3-Medium, 9-High) Req 1 Req 2 Req3 Row Score Relative Weight (%) Rank Order C4-B Concept Hint: Use the design requirements given in the case to decide which design concept should be Selection selected for this case ? Assume Concept 1 is given in Figure 9, Concept 2 in Figure 10, and Concept 3 is shown in Figure 11. Compare chairs given in Fig 9-11 to see which one would Selection MATRIX satisfy given design requirements. List Importance Design Concept Design Concept Design Concept Customer's weighting factor 1 2 3 Points Requirements or (1-5, 1 = least, 5 (Assume given in (Assume given in (Assume given in (9) other criteria = max) Fig 9) Fig 10) Fig 11) Instructor comments or feedback Weighted Total Rank Order