1. Design Concerns

2. IN DEVELOPING DESIGN CONCERNS THE FOLLOWING PRODUCT ATTRIBUTES/FEATURES SHOULD BE CONSIDERED
Physical
Structural
Environmental
Human engineering
Life cycle
Cost

3. PHYSICAL Configuration/size Weight Mass properties
Dimensions (can bound if unable to define exactly - not less than/not greater than)
Tolerances
Surface finishes
Weight
Mass properties
Center of gravity
Moments of inertia

4. STRUCTURAL
Need to consider piece parts and assemblies (joining mechanisms)
Strength
Stiffness
Impact
Durability (fatigue)

5. ENVIRONMENTAL In-service conditions
Temperature, humidity, UV exposure, chemical exposure

6. HUMAN ENGINEERING
Safety
Ergonomics
Aesthetics

7. LIFE CYCLE "Cradle-to-grave“ Sustainability, “Green” Warranty
Maintenance, repairability
Renewable materials
Disposal (recyclable, biodegradable, hazardous materials)
Warranty

8. COST
Cost (materials, manufacturing process - labor, tooling, equipment usage)
Price (look at competing products to gain insight)
Profit

9. ASSUME THE NEED IS A COMMUTER BICYCLE
Translating customer input into quantifiable design concerns
Physical - lightweight
Structural - adequate strength
Environmental - will not degrade when exposed to water
Human engineering - accessibility to controls
Life cycle - easy to service
Cost - affordable price

10. DETERMINING ASSESSMENT MEASURES FOR EACH DESIGN CONCERN
Definition: what will be measured to determine how the design performs with respect to the specific design concern (note units)
Requirement: if the design concern is a requirement, what is the level (value) of the assessment measure which has to be achieved in order to comply with the requirement (for a design concept to be considered a possible solution)
Goal: if the design concern is a goal, what is the desired direction of the assessment measure in order to come closer to achieving the goal (the design concept which performs most favorably with respect to the goals is the best solution)
For the bicycle example