Using the Decision Matrix

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Presentation transcript:

Using the Decision Matrix A Brainstorming Method Used to Help Students Uncover Solutions to Engineering Problems Engineering Design & Development Created By: Dale A. Coalson

Step 1…create a precise problem statement Best way to cut residential grass standing over 12”

Step 2…insert design criteria in top row Inexpensive Reliable Safe Practical Aesthetics Legal Moral Operating $ Best way to cut residential grass standing over 12”

Sample Constraint Terms Feasible Reliable Economical Aesthetic Legal Moral Safe Timely Functional Environment Friendly Ergonomics Practical Ease of Manufacture Standard Parts Ethical Efficient

Step 3…Brainstorm ANY and ALL Ideas Inexpensive Reliable Safe Practical Aesthetics Legal Moral Operating $ Best way to cut residential grass standing over 12” Step 3…Brainstorm ANY and ALL Ideas Rotary Riding Mower Fire String Line Herbicide Fence Salt Fenced Herbivore Gas Push Mower Garden Hoe

Step 4…Rate your matrix using the “Reasonable Man” theory Work Thru. Each Column Inexpensive Reliable Safe Practical Aesthetics Legal Moral Operating $ Best way to cut residential grass standing over 12” Rotary Riding Mower Fire String Line Herbicide Fence Salt Fenced Herbivore Gas Push Mower Garden Hoe - - + ADD - + + - + Step 4…Rate your matrix using the “Reasonable Man” theory

Other Scale Qualifiers Having a beneficial impact = + Having a detrimental impact = - Having a neutral impact = 0 Using the popular scale of 0-10 {Whatever the ranking value make sure the alternative rows can be added up}

Reapply Matrix Cycle to Winner of First Attempt Inexpensive Reliable Safe Practical Aesthetics Legal Moral Operating $ Best Result From MATRIX #1 String Cutter??? Rework String on Front of Mower Use Under Riding Mower String Cutter on Trailer String Cutter on “Outriggers” Steel Line Chain Mounted Head Robotic String Unit Electric Assist String Cutter Redefined Terms

Your Teams Turn