You should have more than one supervisor (and solicit information from peers). But basically...yes...using judgement, learning how to assess skills...that is al

You should have more than one supervisor (and solicit information from peers). But basically...yes...using judgement, learning how to assess skills...that is all part of management. You cannot turn a bad manager into a good one with information. I have seen no evidence that "hard numbers" work (they aren't "hard"...there is usually almost no justification for a particular metric). And it feeds on innumerable human biases (inability to confront uncertainty, using "hard" information to justify an emotional conclusion, creating meaningless targets, etc.). In my experience, the practical issue is two-fold: one, people are just going to do what they do anyway but they ignore warnings signs/are more unflexible and two, you optimise for data that is obvious, collectable, and (usually) completely irrelevant. This is a trend, it will pass as all these trends do. It started off as quite a good idea (businesses were often failing to set targets or quantify success/failure) and has just got totally out of control.