I think productivity monitoring is bullshit. I'll agree it's nice in theory, but it's usually impossible to pull off in a fair or mostly fair way.

I'm a software developer, and I can spend a day going off in a direction that ends up being useless. Some jobs look easy but end up being very difficult and vice versa.

A friend does something to do with approving loans. Some clients are simply more difficult and complicated than others, in ways that can't be predicted by performance measuring software.

To be honest, I think the only jobs where it can work are those that have someone doing something identical in a repetitive manner, though robots have replaced most of those, or jobs that are small enough that you can mostly fit the time required to a simple equation, such as those that pack groceries for delivery.