MAE486_Fall11_L3_S - MAE 486 Design of Mechanical Systems...

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Unformatted text preview: MAE 486 Design of Mechanical Systems Lecture 3 Fall 2011 Today s topics: Introduction to Design (Chapter 1); •  Design Review; •  Redesign; •  Social consideration of Designs; Problem Definition (Chapter 3); •  Introduction; •  Identify Customer Needs; Review: Descrip0on of Design Process •  •  •  •  •  •  •  Phase I: Conceptual Design; Phase II: Embodiment design (Preliminary Design); Phase III: Detailed design; Phase IV: Planning for manufacturing; Phase V: Planning for distribu0on; Phase VI: Planning for use; Phase VII: Planning for re0rement of the products Review: CAE Concurrent Engineering Design for Codes & Standards (surface quality op0miza0on); Design for Codes & Standards What are the different types of codes? Example: What are the different groups of standards? Examples: Design for Codes & Standards Why do companies follow standards? What is the biggest factor in saving? GT: Design Review •  A retrospective study; •  Who should be included in the review team? •  What should be reviewed? Design Review What do we look at in reviews? •  Technical elements; •  Business aspects; Technical elements: Comparison with PDS. Business aspects: What are the considera0ons? What is the review outcome? Redesign •  What is redesign? •  Examples: Redesign Example: Railcar Wheel •  What is the problem? •  What caused the problem? •  Solu0on: Social Considera0on of Design •  ABET statement: •  What are the impacts? –  More lawyers involvement; –  More 0me on planning & predic0on of future effects; –  “Defensive R&D”; –  More R &D, and engineering in environment control and safety; Social Considera0on of Design: Examples Green Design: “Socialware”: Social Considera0on: Government Role •  What is the role of government in technology development? –  –  –  –  –  S0mulus force (How)? Control the growth of the economy (How?) A major customer; A funding source; A regulator of technology implementa0on; Problem Defini0on •  Design process = A filtering process; •  Problem defini0on: –  Most important step in PDP; –  What is the focus? Iden0fy Customer Needs •  Customer = End user? •  Preliminary research on needs: –  What are the methods we can apply? Gather Informa0on from Customers •  How to get inputs from customers? How to Create Customer Survey? •  •  •  •  •  •  •  What is the purpose? How to collect the data? What are the specific informa0on needed? How to design the ques0onnaires? How to arrange the ques0ons, in what order? Pilot test; How to manage the survey? How to evaluate surveys? Ethnographic Studies •  Is survey enough? What is missing? •  What is ethnography? And what is used for in design? Customer Requirements •  Maslow’s hierarchy of human needs Customer Requirements: Different Views Garvin’s Eight Basic Dimensions of Quality Customer Requirements: How to categorize and priori0ze? •  What are the different levels of requirements? Customer Requirements: How to categorize and priori0ze? •  Kano Diagram: •  Results: A more accurately priori0zed list; •  CTQ CRs: ...
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