What materials should the individual components be made out of? Will a certain part wear out over time?
What type of intended use would be bad for a certain material?
The raw material cost per part should not exceed $10.00. Calculate this with material weight -vs - cost.
Manufacturing engineer
Now that the materials are selected and the part has been designed, it is time to determine which manufacturing processes will be used to create the parts.
Based off of the manufacturing process you choose, what machines are needed? How much will that cost for startup?
Make sure you choose processes, materials, and tools which can withstand creating 100,000 parts.
Industrial engineer
Decide how you would set up the factory that produces these devices in such a way to maximize the output. Be thorough in describing why you chose what you chose
How many employees would it take to operate this factory?
How much does this add to the cost of producing 1,000 of these parts?