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Decision Matrix Methodology

  • Doing pros and cons is not perfect because that means that you are introducing your own emotions into it
  • Pugh made the decision making matrix
  • A decision matrix is used to compare design solutions against one another, using specific criteria that are often based on project requirements.
  • You need to form a team and the team has to have the knowledge necessary in order to do it
  • Originally, they had only -1, 0, and 1 for the scale to use in the decision matrix
  • Now we usually use 1-4. However, the original scale used those numbers because the negative one meant that it was bad, the 0 meant that it was neutral, and the 1 meant that it was positive.
  • Criteria for Puzzle Materials
    • Cost (always going to be involved in engineering and the money has to come from the finance department)
    • Reusability
    • Geometry
    • Connections
    • Cleanliness
    • Resilience
    • Testability
    • Other Criteria
      • Function
      • Product Life span
      • Development time
      • Size
      • Material costs
      • Development Costs
      • Manufacturing costs
      • Company standards
      • Manufacturing costs
      • Company Standards
      • Manufacturing capabilities
      • Safety
  • Develop a decision Matrix
    • A grading scale must be developed to assign values for each criteria category
    • You have to stick to the question and the rank scale for all of the criteria
    • In question columns, boolean answers must be used
    • Criteria are across the top and the ideas are along the left
    • You have to have a rank scale and a question scale
    • Design decisions should be based on analysis and logic and not on personal opinion
    • A decision matrix is a design tool that may be used multiple times throughout a design process

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