decision matrix. develop a decision matrix a decision matrix is used to compare design solutions...
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Decision Matrix
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Develop a Decision Matrix
A decision matrix is used to compare design solutions against one another, using specific criteria that are often based on project requirements.
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Identifying Ideas or Alternatives
What material would be best for creating models of puzzle pieces?
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Idea #1
Modeling Clay– Reusable– Readily available– Requires forming– Sticky– Imprecise
geometry
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Idea #2
Caramel Cubes– Cheap– Readily available– Pre-shaped– Sticky– Imprecise
geometry
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Idea #3
Dice– Expensive– Reusable– Require two-sided
tape– Moderately stable– Precise geometry
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Idea #4
Centimeter Cubes– Cheap– Reusable– Interlocking– Protrusions– Precise geometry
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Idea #5
Foam Blocks– Expensive– Reusable– Require two-sided
tape– Fall apart easily– Imprecise
geometry
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Idea #6
Sugar Cubes– Cheap– Readily available– Require glue– Have messy
granules– Fairly uniform
geometry
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Identifying Criteria
• Cost
• Reusability
• Geometry
• Connections
• Cleanliness
• Resilience
• Testability
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Other Criteria
• Function
• Product life span
• Development time
• Size
• Material costs
• Development costs
• Manufacturing costs
• Company standards
• Manufacturing capabilities
• Safety
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Develop a Decision Matrix
A grading scale must be developed to assign values for each criteria category
Rank ScaleQuestion
Scale
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Ranking The Alternatives
231
4
14
212
2
21
124
4
33
221
2
11
123
4
32
112
4
23
114
2
23
101217
22
1417
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Idea #4 Is Right Decision
• Design decisions should be based on analysis and logic; not personal opinion
• Decision matrix is a tool that may be used multiple times throughout a design process