Here is a check list of things to consider when designing or reviewing a part for release

Questions to consider

What is the function of the part?

What is the worst case scenario the part will experience?

What are the required tolerances?

Can parts be combined in a single component?

What is the lifetime of the part?

How will the part be assembled?

Will fasteners be used? Are they selected or designed properly?

Will adhesives be used? Are they suitable with their substrates?

Does the part have a snap fit? Is the designed stroke appropriate for the design stress? How frequently will it be activated?

Is there room for a tool?

Will the part be serviced? How frequently?

What temperatures will the part experience? For how long?

Is weather or UV protection a concern?

What chemicals will the part be exposed to?

Is moisture exposure/resistance a concern (i.e. nylons)?

What loading and  stress will the part experience? Static, continuous, dynamic? Will temperature conditions affect loading performance?

Will the part be subjected to impact?

Is wear resistance a concern?

Are their appropriate radii, draft, and/or wall thicknesses?

Are there any undercuts (for molded parts)?

Are there any thin steel conditions (for molded parts)?

Will the part be painted? Colored?

Does the part have to be sterilized? Are selected material suitable for sterilization process?

Will thermal expansion affect the fit between mating parts?

For loaded molded parts is creep a concern?

If the part is to be machined, how many setups are required? Can it be optimized? Is there room for cutting tools?

How will the part fail? What are the risks associated with failure?