Engineering Design Life Cycle

What are first 4 steps to Simon’s eight-step method to life cycle engineering?

1. Needs analysis

2. Feasibility study

3. Preliminary design

4. Detailed design

What the last 4 steps to Simon’s eight-step method to life cycle engineering?

5. Production

6. Dostribution

7. Comsumption

8. Retirement

How does the first step relate to nine-step design process?

Basically the same as recognizing the need/ defining the problem and identifying the client/sponsor needs.

What should an engineer ask themselves on the second step? What are two main limitations?

Should I proceed with the project?

• just because someone stated it as a need does not make it reasonable or even possible.

Technological and economic are two main limitations

What is preliminary design cycle

• initial number of concepts

• Initial number reduced

• More concepts added

• Further reduced

• Further addition

• Final selected concept

What do you do once a single design concept ( or a couple) have been selected?

1. Start refining concepts in greater detail

2. Create drawings for parts, subassemblies, assembly, exploded view

3. Verify fits and clearances, due calculations.

What are 4 steps in Dr. Taguchi Robust Parameter Design

1. Problem Formulation

2. Data collection/ Simulation

3. Factor Effects Analysis

4. Prediction/ Confirmation

What should be considered for P-Diagram

1. Environmental variation during products usage

2. Manufacturing variation

3. Component deterioration

4. Cost of failure in field

What are distribution factors?

1. Shipping and storage in warehouses

2. Possible extreme weather

3. Unforeseen damage during transit

What should be kept in mind when a product is in use?

1. Product safety

2. Required maintenance

3. Possible consumable supplies

4. Possible waste generation

What happens at the end of a useful products life?

1. Reuse and recycling

2. Waste disposal, solid and liquid, hazardous