That depends what you consider monitoring to be. Managers don't just know these things, they aren't walking the floor watching people, they're busy doing things

That depends what you consider monitoring to be. Managers don't just know these things, they aren't walking the floor watching people, they're busy doing things. Their source of knowing these things is often looking at data for the number of things processed, or in some cases failure rates. You're right that this doesn't need to be constant or even that automated though.