The prototype isn't just a physical thing. It's an entire process of planning, building and testing that thing. e.g., it includes consideration of the various things you've listed. It goes without saying.
This guy has managed to push the build of a well-reviewed and semi-revolutionary car, not to mention frickin' rockets. I think his staff can foresee the challenges, then design and test for them.
This guy has managed to push the build of a well-reviewed and semi-revolutionary car, not to mention frickin' rockets. I think his staff can foresee the challenges, then design and test for them.