BELLWORK

1. HOMEWORKdue 09/16 BELLWORK Using your brainstorming list and any other solution ideas you have, select a solution to pursue for your selected problem statement. Use a Decision Matrix to justify your selection. (Turn in a copy and keep a copy) What are the “rules” for brainstorming? (Turn in at 11:35 am)

2. The Engineering Design Process – Review 1. Define the problem (“Ask”) 2. Gather pertinent information (“Understand”) 3. Generate multiple solutions (“Imagine”) 4. Analyze and select a solution (“Plan”) 5. Test and implement the solution (“Create”) 6. Communicate results and refine the solution (“Improve”)

3. A Word About Research • Make sure your research questions are focused on collecting information and not on establishing or repeating criteria: “The design should not cause undue pain and suffering for the mouse.” • Instead of… “Should the trap kill the mouse or only keep it from escaping?” • …ask “What are some ways to kill a mouse? What are some ways to restrain it without hurting or killing it?”

4. Analyze and Select a Solution “Analysis” is the evaluation of the suitability of possible solutions “Selection” can be the choice of a single idea, the combination of several ideas, or a new idea created by considering the solution candidates Apply your knowledge of the problem (including research) to find a good solution

5. Things to Consider • Function: Will my solution function properly, or will it fail to solve the problem? • Failure to identify correct criteria in problem statement • Failure to completely address criteria • Web Investigation: Ballpoint Pens

6. Things to Consider • Usability: Even if my solution is good, will it be usable? • Ergonomics • Fit, comfort • Ease of use • Is training required? • Does it require new supplies or tools?

7. Things to Consider • Safety & Liability • A supplier of a solution is legally and ethically responsible for unintended consequences • Personal, property, environmental damage • Safety must be designed in • Intrinsic Safety • Guards and other protection • Warning Labels • To advise against dangers or unsafe usage • Not very effective legally

8. Things to Consider • Economics • Does the solution meet cost goals? • Does it meet customer requirements? • Cause & Effect Matrix or “Decision Matrix” • Many good ideas fail because of price or other marketability issues • In fact, others might refine your idea and become the first to be successful with it! • Early calculators were produced by Bomar, but TI managed to make them cheaper and better

9. Things to Consider • Reliability • Even if the solution functions well under normal conditions, how likely is it to fail if conditions change? • FMEA – Failure Modes and Effects Analysis • A methodical process for predicting the likelihood of failures, the effects of those failures, and ways to prevent them

10. About the Homework After we review the remaining two steps, you will be required to turn in a typed Final Report detailing your problem statement & criteria, research, idea generation, solution selection process, testing & evaluation, and proposals for improvement. Due Monday Sep 20 You should start NOW putting together the work you’ve done so far.

11. Decision Matrix • Rank the Criteria in Order of Importance • Try to have at least 5 criteria and 10 solution ideas for your selected problem • Assign an “importance” score (1 – 10) to each criteria, 1 being not important at all through 10 being critical to the acceptability of the solution. • For each criterion, assign a “success” score (1 – 10) to each solution, 1 for a solution that does not satisfy that criterion at all, to 10 for a solution that satisfies that criterion the best. • Multiply the importance score by the success score at each intersection of the matrix and total.

12. Can features of these solutions be combined?