8: Product Development Methods and Tools Flashcards
What is the Design-Build-Test cycle?
Design: Establish goals, Generate alternatives
Build: Build models/prototypes
Test: Run experiments or simulations
Repeat until model/prototype matches or exceeds goal(s).
What is quality function deployment (QFD)?
House of quality or “voice of the customer”: A formalized method of matching the expressed needs of the customer/end-user.
Rating needs of customers 1-5
What is design for manufacturing/assembly? (DFM/DFA)
A way to design a product that is minimizes complexity for manufacture/assembly
What are the steps to DFA? (6 steps)
- Obtain the best information about the product or assembly
- Take the assembly apart, assign an identification number
- Re-assemble the product and complete worksheet
- Estimate the manual assembly time, the assembly
cost, and the theoretical minimum number of parts - Calculate the Design efficiency (EM)
- Re-design the product, and calculate a new EM
How can parts be eliminated?
Does the part move by itself?
Can this part not be integrated into another part?
Does integrating/removing this part make it impossible to service the product?
If the answer is “no” to these questions the part can most likely be eliminated
What is design effiency (DE) and what does the result mean?
<10% Re-design
11-20% Could be improved.
21-35% Approved for production.
36-50% Very good result.
>50% Hard to achieve.
What are some advantages to eliminating components?
An eliminated compnent doesn’t need to be designed, documented, serviced, assembled, changed and can’t break…
What are prototypes used for?
Learning: To verify a design, Get feedback from customer.
Communication: Prototypes makes it easier to explain and understand.
Integration: Ensure that components fits togheter.
Milestone: Demonstrate the product works and have a live working build during development.
What are some rapid prototyping techniques?
Solid: Laminated Object Manufacturing (LOM),
FGM/3D-printing
Liquid: SLA, SGC, DDM
Powder: DMLS, LDT, EBM
