Yeah, the NUMMI workers really improved. But that was only after they were fired and could only come back to work if they accepted the change.

In all other GM plants, both the unions and management blocked the changes for something like 15-20 years.

The part I found most interesting is the focus GM had on what you could see. NUMMI worked because they could get the type of parts they needed etc but they needed to infect the rest of the organization with the idea before GM could really benefit.