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Fundamental Design Tools

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Title: Fundamental Design Tools


1
Fundamental Design Tools
  • Chapter 2

2
Brainstorming
  • Five to fifteen individuals
  • Discussion leader restates problem and reiterates
    rules of discussion
  • Individuals suggest ideas
  • Evaluate ideas at conclusion of discussion
  • Useful for new ideas / deadlock
  • Drawback relies on willingness to speak up

3
Class Design Problem
  • Ear Wax

4
Six individuals
  • Useful in systematic approach and large numbers
    of ideas
  • Drawback isolation, no group synergy

5
Delphi Model
Resultant response list is reordered and evaluated
  • Expert panel generates starting points

Suggestions are regrouped and returned to
panelists
Polling process
Useful in situations where future of process is
of concern
Drawback relies on high response rate
6
  • Problem is presented to a small group
  • Group familiarizes itself with the problem

Synetics
  • Also utilizes variations such as randomly
    choosing words from a dictionary and forcing a
    fit
  • Analogies of terms are examined and relationships
    forced
  • Useful when problem to be solved has an analogy
    and group is willing to explore bizarre trains of
    thought

7
Class Design Example
  • Right to left heart shunt that needs to be closed
    minimally invasive technology.
  • When doing catheterization, need to go with the
    flow
  • Cannon droops when rapidly fired.
  • Need to get a ladder through a small space and up
    in an alleyway.

8
Web-based and Print Literature
  • Web-based search engines
  • search for recent books
  • -search for
    granted
  • or pending
    patents
  • Trade magazines product design (see my web site
    under )
  • And www.google.com search for topics

9
Process Chart Symbols
Operations
Inspection
Transportation
Delay
Storage
10
Process Chart
11

Flowchart

Activity
Start or end
Decision
Yes
D
No
12
Flowcharting
  • Assists in understanding processes to modify or
    improve them.
  • Broad range of charts- from simple process charts
    to fairly complicated combinations of signal,
    material, and information flows.
  • Dr. King at the doctor
  • Flowcharting Overview

13
Clinic Flow Charts
Linear system-Each event must be complete prior
to the next beginning
14
Flowcharts with Decision Points
15
Decisions Selection Chart
16
Evaluation Chart
17
Objective Tree
18
Quality Function Deployment Diagrams (QFD)
19
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20
TRIZ
  • Russian acronym based upon series of papers on
    the theory of inventive problem solving
  • Method of reducing design process to a
    step-by-step procedure
  • As difficulty increases, number of solution
    increases
  • Different themes of transition have finite
    variations
  • Negative interactions between desired functions

21
TRIZ - Basic
  • ID Problem
  • Restate to elaborate contradictions
  • Search for previously well solved problem
  • Search for analogous solutions

22
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