1. Ten-Stage Design Process
Design and Modeling
Ten-Stage Design Process

2. What Is Engineering Design?
“Engineering Design is the process of designing a system, component, or process to meet a desired need.” (Gomez et al 349)

3. Engineering Design cont.
Continuous process
Can be short and simple, or
complex and in-depth processes
Used for:
Ongoing manufacturing processes
One-time designs

4. Significant Factors Functionality Quality Safety Ergonomics Appearance
Environmental Considerations
Economics
Tacoma Narrows Bridge Disaster

5. Ten-Stage Design Process
Begins with appointment of project manager
Responsible for oversight of project
Recruitment of team members of various backgrounds and expertise

6. Stage 1: Identify the Problem/ Product Innovation
Establish the Problem
Identify information sources to understand problem’s scope and nature
Develop a preliminary, formal problem statement
All correct issues and backgrounds have been explored

7. Stage 2: Define the Working Criteria and Goals
Establish preliminary goals
Act as focal points throughout process
Determine working criteria
Develop process goals
Checkpoints for progress
Example Working Criteria Questions
Costs?
Production Difficulty?
Size, Weight, Strength?
Appearance?
Ease of Use?
Safe to Use?
Legality Concerns?
Reliable & Durable?

8. Stage 3: Research & Gather Data
All problem aspects explored with good, reliable background information
What information is needed
Best sources for information
Organization is key

9. Stage 3: What Info is Needed?
Published info on problem?
Availability of existing solution?
Who is providing info?
Advantages and disadvantages to solution.
Costs?
Significant issue?
Ratio of time spent compared to overall costs.
Legal issues?
Environmental concerns considered?

10. Stage 3: Sources for Information
Trade Journal
Libraries
Professional Associations
Trade Journals and Publications
Newspapers and Magazines
Market Assessment Surveys
Government Publications
Patent Searches and Listings (
Competition’s Products

11. Stage 4: Brainstorm and Generate Creative Ideas
Develop as many creative solutions to the problem addressed as possible
Consider all ideas
“Dumb” ideas may lead to the final solution!
Example of Brainstorming

12. Stage 5: Analyze Potential Solutions Phase I
Generated ideas narrowed to few ideas
Examine list and eliminate duplicates
Similar ideas may remain, but not duplicate
Clarifying questions offered by team
Evaluation by vote

13. Stage 5: Analyze Potential Solutions Phase II
Remaining ideas analyzed thoroughly and accurately
3 to 5 options should remain after analysis
May have to start process over
Analyzing Possibilities
Common Sense
Economic Analysis
Estimation
Compatibility Analysis
Computer Analysis Techniques
Conservative Assumptions

14. Stage 6: Develop and Test Models Modeling
Method of illustrating a solution to a practical problem
Types of Modeling
Descriptive
Functional
Mathematical
Computer
CAD Model

15. Stage 6: Develop and Test Models Testing
Allows for comparing and evaluating against established criteria and goals
Done throughout a project
Early models
Prototypes
Quality
Computerized Stress Test

16. Stage 6: Develop and Test Models Testing Examples
Durability
Ease of Assembly
Reliability
Strength
Functionality
Environmental Considerations
Quality and consistency
Nissan Primera Crash Test

17. Stage 7: Make the Decision
Team members establish a means to compare and evaluate results of testing
Working criteria will determine advantages and disadvantages of possible solutions
Develop a Decision Table to visualize each solution’s merits

18. Stage 8: Communicate and Specify
All information gathered reported to client
Detailed written reports
Summaries of technical presentations/memos
Relevant s
Diagrams, charts, graphs
Drawings and sketches
Computer printouts
Relevant documented material
Last chance to make revisions/terminate

19. Stage 9: Implement and Commercialize
Project Manager and Team Members
Management and Key Personnel
Technical Representatives
Business Representatives
Attorneys and Legal Support Staff

20. Stage 10: Post-Implementation Review and Assessment
Project is probably in full production
Team is terminated because task is complete
Product Performance Review
Assessment Report detailing product
Used as reference for future project managers and teams
Product Performance Review
Data on production efficiency
Quality Control Reports
Money Issues
Assessment Report
Strengths & Weaknesses
Outline what has been learned
Suggest ways to improve process quality