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Chapter 7 Concept Selection

MSE-415: Product Design Lecture #7. Chapter 7 Concept Selection. Lecture Objectives:. Turn in and discuss Homework #4 Discuss structured methods for selecting a single concept design from several available designs. Concept Selection.

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Chapter 7 Concept Selection

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  1. MSE-415: Product DesignLecture #7 Chapter 7Concept Selection

  2. Lecture Objectives: • Turn in and discuss Homework #4 • Discuss structured methods for selecting a single concept design from several available designs.

  3. Concept Selection • Concept selection is part of the overall concept development phase. Mission Statement Development Plan Identify Customer Needs Establish Target Specifications Generate Product Concepts Select Product Concept(s) Test Product Concept(s) Set Final Specifications Plan Downstream Development Perform Economic Analysis Benchmark Competitive Products Build and Test Models and Prototypes

  4. Concept Selection • Non-structured methods for choosing a concept: • External Decision • Product Champion • Intuition • Multi-voting • Pros and Cons • Prototype and Test • Decision Matrices

  5. Concept Selection • External Decision Concepts are turned over to the customer, client, or some other external entity for selection.

  6. Concept Selection • Product Champion An influential member of the product development team choosesa concept based upon personal preference.

  7. Concept Selection • Intuition The concept is chosen by its feel. Explicit criteria or trade-offsare not used. The concept just ‘seems’ better.

  8. Concept Selection • Multi-voting Each member of the team votes for several concepts. Theconcept with the most votes is selected.

  9. Concept Selection • Pros and Cons The team lists the strengths and weaknesses of each conceptand makes a choice based upon group opinion.

  10. Concept Selection • Prototype and Test The organization builds and tests prototypes of each conceptmaking a selection based upon test data.

  11. Concept Selection • Decision Matrices The team rates each concept against pre-specified selectioncriteria, which may be weighted.

  12. Concept Selection • Structure Method – Offers Several Benefits • Customer Focused Product • Concepts explicitly evaluated against customer criteria. • Competitive Design • Benchmarking pushes the design to match or exceed competitor’sperformance along key dimensions. • Better product-process coordination • Evaluation with respect to manufacturing helps match the productwith the capabilities of the firm. • Reduced time to product introduction • Structured method becomes common language within firm. Increasedcommunication, decreased ambiguity, fewer false starts. • Effective group decision making • Decision making based upon objective criteria and minimizes arbitraryor personal factors that influence product concept. • Documentation of the decision process • A structured method results in a readily understood archive of the rationale behind concept decisions.

  13. Concept Development Funnel

  14. Concept Selection • Overview of Concept Screening Methodology • Prepare a selection matrix • Rate the concepts • Rank the concepts • Combine and improve the concepts • Select one or more concepts • Reflect on the results and the process

  15. Concept Selection • Prepare a selection matrix for syringe.

  16. Concept Selection • Rate the Concepts

  17. Concept Selection • Rank the Concepts

  18. Concept Selection • Combine and Improve Concepts

  19. Concept Selection • Select one or more concepts

  20. Concept Selection • Overview of Concept Scoring Methodology • Prepare a selection matrix • Rate the concepts • Rank the concepts • Combine and improve the concepts • Select one or more concepts • Reflect on the results and the process

  21. Concept Selection • Prepare a selection matrix Bolded 3’s indicate reference.

  22. Next WeekOctober 17, 2007 • Homework due • Page 140 Exercises 2, 3, 4 • Read Chapter 8 – Concept Testing • Discuss structured methods for evaluating concept designs.

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