W9workshop - Workshop Exploration of Engineering Design...

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Engineering Education EngE 1114, Spring 2009 Workshop Exploration of Engineering Design EngE 1114 - Week 9 Conceptual Design: Generating, Evaluating, and Selecting Alternatives
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Engineering Education This Week in ENGE1114 Generate Alternatives Evaluate Alternatives Select an Alternative Generate concepts for each secondary-function 6-3-5 Method Combine concepts Morphological Matrix Identify selection criteria Assign weighting Pairwise Comparison Chart Evaluate Alternatives Selection Matrix
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Engineering Education Functions Solutions Store power Store music Provide means of control Absorb shocks Rechargeable battery Solar power Hydrogen fuel cell Energetic hamster Solid state memory Hard drive Touch wheel Joystick Trackball Mind control Aluminum shell Springs Bubble wrap Inflatable cushion mp3 Example Alternative #1 Alternative #2 Alternative #3
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Engineering Education Today’s Agenda: Selection Generate Alternatives Evaluate Alternatives Select an Alternative Generate concepts for each sub-function 6-3-5 Method Combine concepts Morphological Matrix Identify selection criteria Assign weighting Pairwise Comparison Chart Evaluate Alternatives Selection Matrix
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Selection Matrix Constraints Alternative #1 Alternative #2 Alternative #i C1 Y/N Y/N Y/N C2 Y/N Y/N Y/N Objectives Weight (%) Score Weighted Score Score Weighted Score Score Weighted Score O1 W1 S1,1 W1*S1,1 S2,1 W1*S2,1 Si,1 W1*Si,1 O2 W2 S1,2 W2*S1,2 S2,2 W2*S2,2 Si,2 W2*Si,2 Oj Wj S1,j Wj*S1,j S2,j Wj*S2,j Si,1 Wj*Si,j Total 100 SUM SUM SUM 1. Identify selection criteria and scale-type 2. Assign weighting to each criteria 3. Evaluate each alternative 4. Normalize scores 5. Calculate total score Selection steps:
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Engineering Education Paper Airplanes ‘R Us An Illustrative Example of Selection
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Engineering Education Paper Airplanes ‘R Us Challenge: A new company, Paper Airplanes 'R Us, is planning to market paper airplane pattern kits for children's camps and birthday parties. They are looking for airplane patterns that children will enjoy. Airplanes must be constructed from sheets of 8 1/2” x 11” copy paper and scotch tape. Your job is to propose alternative concepts and select the most-likely-to-succeed concepts for further development and analysis.
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Engineering Education Concept Generation: Paper Airplanes R Us 1 2 3 4 5 6
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Engineering Education Selection Matrix Constraints Alternative #1 Alternative #2 Alternative #i C1 Y/N Y/N Y/N Objectives Weight (%) Score Weighted Score Score Weighted Score Score Weighted Score O1 W1 S1,1 W1*S1,1 S2,1 W1*S2,1 Si,1 W1*Si,1 O2 W2 S1,2 W2*S1,2 S2,2 W2*S2,2 Si,2 W2*Si,2 Oj Wj S1,j Wj*S1,j S2,j Wj*S2,j Si,1 Wj*Si,j Total 100 SUM SUM SUM Selection Criteria : List constraints (must be met) and selection criteria
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Engineering Education Establish Scales Think back to the first phase of design How will you measure satisfaction of objectives (metrics)?
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This note was uploaded on 07/05/2010 for the course ENGE 1114 taught by Professor Twknott during the Spring '06 term at Virginia Tech.

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W9workshop - Workshop Exploration of Engineering Design...

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