Yeah, I was thinking that. Once people know how the system works, people will game the system. In my experience, there are some people who want to manipulate everything in their favor and against the rest and you cannot really do that (‘networking’ with your manager etc) from home, so they invariably go to the office. So metrics from pm systems are suspect: they are skewed often to people who figured out how to make the stats look good for them. I have seen it too many times. The last big client I had, had a system which gave a combined score analysis based on hours worked, tasks done, github commits, LoC (yep) and some other stuff. It was trivial to make yourself look 10x better than someone who didn't know how it worked or who didn't care or who was just honest.
These are very specific numbers - how do you measure this?