Multidisciplinary Senior Design I System Design Marcos Esterman

Multidisciplinary Senior Design I System Design Marcos Esterman, Associate Professor Industrial and Systems Engineering Department Rochester Institute of Technology marcos. esterman@rit. edu

CONCEPT GENERATION 2

5 -Step Process (Ulrich & Eppinger, pg. 100) 1. Clarify the Problem n Clarify the Problem q q q Sub-problems n Search Externally q 2. Search Externally q 3. Search Internally q q n Existing Concepts 4. Explore Systematically Integrated Solutions New Concepts q q q n df. X Analysis Field Feedback Institutional Knowledge Supply Chain Explore Systematically q 5. Reflect on Solutions Lead users Experts Patents Benchmarking Search Internally q n Start from Product Definition Decomposition Prioritize Classification Tree Combination Tree Morphological Analysis TRIZ Reflect on Process & Solutions 3

Secrets of Concept Generation n n Employ many techniques Focus on values / functions Avoid premature closure Generate several alternatives q q q n “Sky High” “Challenging technology” “Low Risk” Screen ideas systematically q e. g. , Pugh selection process 4 Ishii, 2004

Pahl and Beitz Morphologic al Analysis n Morphology q n Morph. Analysis q n Study of shape and form Systematic study to analyze the possible shape and form Morphological Diagram q Example: Potato Harvesting Machine 5

Start with Functional Diagram n Bathroom Scale Example q Expand Functions to manageable sub-functions Support Subject Conv. Mass to Signal Measure Weight Indicate Signal Hold Parts Together 6 Ishii, 2004

Use the Function Diagram to Generate Concepts n Bathroom Scale Support Subject Measure Weight Plate Conv. Mass to Signal Spring Indicate Signal Dial Hold Parts Together Screws Box Bubble Strain Gauge Count Molecules Corn Flakes Voice Sound Digital Display Glue 7 Ishii, 2004

Generate Feasible Solutions n Feasible (Conventional) Bathroom Scale Support Subject Measure Weight Plate Conv. Mass to Signal Spring Indicate Signal Dial Hold Parts Together Screws Box Bubble Strain Gauge Count Molecules Corn Flakes Voice Sound Digital Display Glue 8 Ishii, 2004

Generate “Sky high” Ideas too. . . n “Sharper Image” Bathroom Scale Support Subject Measure Weight Plate Conv. Mass to Signal Spring Indicate Signal Dial Hold Parts Together Screws Box Bubble Strain Gauge Count Molecules Corn Flakes Voice Sound Digital Display Glue 9 Ishii, 2004

Morph Chart Douglas Axtell, Don Moran, Jason Stanbro, Jim Vermeire, 0303 -786 & 0303 -788 Class Project, 2010 10

Can Opener Example Locate Can Access Can Secure Can Actuate Opener Grip Can Edge Puncture Can Pierce Can Open Can Separate Lid Transmit Electrical Energy Capture Lid Rotate Can Access Contents Protect Opener Covert Electrical Energy to Rotation Covert Rotation to Torque

Can Opener Example Access Can Actuate Opener Puncture Can Rotate Can Capture Lid Access Contents Protect Opener grasp