Back when I was in semiconductors in the US (worked for a prominent wafer fab equipment vendor), there was a push to improve efficiency by logging all your hours, describing the projects you were doing, and giving them subjective importance scores. My manager was like- "Don't waste your time on that, its worthless. Everyone ends up reporting they are working 110% on the most important projects if you ask them."

Anyways the fabs in the US always had lower employee efficiency because the Taiwanese and Korean fabs would always show their employees managing to get installs or maintenance done in record time without any using any overtime. What was happening was simple wage theft: employees were expected to complete unpaid overtime. That was the culture, which rolled downhill from the TSMC and Samsung fab managers: your teams either work unpaid overtime or they find another job.

Occasionally US based personnel would go over to help if there was a big install effort or something. The local account teams didn't like doing this because the US guys wouldn't work unpaid. Thus the install hours would start creeping up and it made them look bad.