Optimization of assembly lines and critique about it is pretty old by now.

I read somewhere how the japanese tried to optimize assembly lines and have a big board where everywhere there is a work stoppage a red light would go off so you could isolate and see the patterns. The ideal was that red lights would go on and off everywhere all the time, so that all workers are working at the edge of capacity. If they are not going home totally stressed out you're doing it wrong! /s