Design Process ME 250:Design Manufacturing I School of Mechanical Engineering Shanghai Jiao Tong University 1
Shanghai Jiao Tong University 1 Design Process ME 250: Design & Manufacturing I School of Mechanical Engineering
What is a Design Process? Design process knowledge A design process is a mapping Resulting Design products from customer that meet need the need need/desire to Design process paths the final product. Physics Materials Electric science motors Engineering Thermodynamics science Engineering Welding Manufacturing economics design processes Pumps (U川lman,1992) Kinematics Domain knowledge Shanghai Jiao Tong University 2
Shanghai Jiao Tong University 2 What is a Design Process? A design process is a mapping from customer need/desire to the final product. (Ullman, 1992)
The Design Process The process of designing is a complex human activity. Technical skills Other human activities ■Cognition Creativity Personal discipline Interpersonal relations Shanghai Jiao Tong University 3
Shanghai Jiao Tong University 3 The Design Process n The process of designing is a complex human activity. n Technical skills n Other human activities n Cognition n Creativity n Personal discipline n Interpersonal relations
How Can a Design Process be Structured? Divergence Transition Convergence Definition Generate solution Select most likely Select final design Prototyping concepts concept candidates Analysis Find the right problem to solve Brainstorming Pugh charts -Detailed configuration Build a working prototype -Checklists QFD Optimization .Rapid prototyping methods What problem is most -Synectics -DFX important? Manufacturing planning Is there a deeper root cause? -Morphological analysis Rough prototyping -Rough prototyping -What are the problem Brainwriting (sketch models) User feedback characteristics？ Wishful thinking Rough analysis -Testing -What are characteristics of a ldea triggers User feedback(update good solution? -Functional decomposition problem definition) What are the constraints? -Analogies QFD (ODE,2001) Shanghai Jiao Tong University 4
Shanghai Jiao Tong University 4 How Can a Design Process be Structured? (ODE, 2001)
Problem Definition Objectives Tools ●Personal Experience ●Market Research Form the design team ·Root Cause Analysis·Reverse Engineering Identify all stakeholders ·Analogies ·Case Studies ●Customer Interviews ●Patent Search Research and understand user r·Expert Interviews ·Web Search Research and understand the ●Stakeholder ●Library Search environment Interviews ●Benchmarking ●User studies ●Catalogues Research and understand the ·Semantic Inquiry ●Magazines product domain ·QFD Shanghai Jiao Tong University 5
Shanghai Jiao Tong University 5 Objectives Tools – Form the design team – Identify all stakeholders – Research and understand user – Research and understand the environment – Research and understand the product domain Personal Experience Root Cause Analysis Analogies Customer Interviews Expert Interviews Stakeholder Interviews User studies Semantic Inquiry QFD Market Research Reverse Engineering Case Studies Patent Search Web Search Library Search Benchmarking Catalogues Magazines Problem Definition