Comment by delfinom
1 day ago
No the point is "overhead". You don't disturb working setups because you will cause engineering time to update the setup, that engineering time is added to the cost overhead of a job. Time is literally money, even if the employee(s) are salaried, their time is factored into the cost of a job.
The knowledge is still there, but American labor is expensive as hell compared to overseas competitors and so any shop in the US has to contend balancing their profit margin and costs to remain competitively priced.
When doing machine shop jobs, it's far easier to bury the cost of initial tooling/fixturing in the initial first job as a separate line charge for NRE. It's alot harder to sell to customers that you will charge them that cost on subsequent orders. You can charge customers for "setup overhead" on subsequent orders but that should be the cost of putting any existing tooling into service, not engineering new ones because you decided to change shit on a whim.
> The knowledge is still there
Tell that to the people who lost FOGBANK, or rather, the knowledge and most importantly the practical experience on how to make it. Or Emmentaler cheese - the one with the bubbles. Turns out, you need something only discovered when someone noticed the bubbles began to vanish... small contaminations from microscopic hay particles [1] that went away when manufacturing switched to fully sealed vats.
There is always, always undocumented steps and unknown implicit assumptions involved in any manufacturing process. No matter how good the documentation is, you need the practical experience.
And that, in turn, is also why the US is producing so much military surplus - should there ever be a full blown war with Russia or China, or there be any other need for a massive invasion land war for whatever cause, there is a shit ton of stuff on stockpile and the production can be rapidly scaled up by experienced personnel training fresh recruits. That would be outright impossible to do if there were no experienced personnel.
[1] https://www.yahoo.com/lifestyle/mystery-of-disappearing-hole...
Modern shipbuilders know all about that.