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by throw2ih020 2 hours ago
There are two parts to manufacturing technology: The written knowledge of what to build, and the process knowledge of all the gotchas and tricks and skill that people experienced in their craft rarely write down. (In many cases the great craftspeople with the knowledge are not great teachers or writers). Manufacturing an object is not like compiling code, where if you pick the right inputs and machines you get the same output. The actual process of building is so full of domain knowledge and variability that ten different people following the same written instructions can get wildly different results.

Derek from SmarterEveryDay ran into this when trying to get a product manufactured in the US and shared his experience: https://youtu.be/3ZTGwcHQfLY?t=1386