On many occasions, I have taken new, completed electrical panels and did my own "tug'n'tighten" as they call it in the industry where you tug on a wire terminal to see if it will yank out, if OK still tighten the screw.
Sometimes a "bad" assembler will be sloppy or weak and you have loose terminals here and there
I've even just gone through older panels and found loose terminals, which I tighten all because I'll get blamed for any problems just because I was the last person in the cabinet.
Boeing has unhappy employees, for years now, they post on Reddit. Why they can't tighten a bolt:
- Shift away from engineering focused leadership
- Little to no training for literally months and months.
- People thrown into roles with no guidance whatsoever
-New hires training new hires
-New hires responsible for roles above their grade
-Massive amounts of turnover leading to major brain drain
-Bad RTO (Return to Office) policy
-Email chains 30 emails long of people asking questions and nobody having the answers or knowing who to even ask
-Compensation is below competitors
-Cutting benefits
It sounds like the culture there is a disaster