[red_admiral]

> It would be crazy if in an auto factory people were measuring to make sure every angle is correct

They are.

Mechanical engineers measure more angles and measurements than a consultant might guess - its a standard part of quality control, although machines often do the measuring with the occasional human sampling as a back-up. You'd be suprised just how much effort goes into getting things correct such as _packs of kitkats_ or _cans of coke_.

If getting your angles wrong risks human lives, the threat of prosecution usually makes the angles turn out right, but if all else fails, recalls can happen because the gas pedal can get stuck in the driver-side floor carpet.

Assembly-line engineering has your favour that (A) CNC machines don't randomly hallucinate; they can fail or go out of tolerance, but usually in predictable ways and (B) you can measure a lot of things on an assembly line with lasers as the parts roll through.

It was thankfully a crazy one-off that someone didn't check that _the plugs were put back into the door_, but that could be a sign of bad engineering culture.