The second thing this helps with is project-based tracking. That is super useful, because I had no idea before how much time I'm really dedicating to my different projects. Of course, my initial assumptions have to make sense. I.e. if I decide to spend 25% of my time on a high-risk project and 35% of my time on a more attainable project, those targets have to make sense. But assuming they do, this system helps me match my targets.
I suppose the next step would be to regress those indicators on some external output, like number of papers published, but I think coming up with a sensible metric would be very difficult.
But if the system allows us to achieve some desirable goal, why would it need to have any external benefit by itself, besides helping you to attain the goal?
It seems more interesting than useful. Lots of analysis, not much benefit. Maybe
"The only hard targets I currently have is to spend >10% of time writing, and >15% of time reading, which I have hit. This was something I struggled with tremendously before, and I only succeeded when I started tracking work type specifically."
is a benefit, but it's fairly representative in that it's something of a goal within the system rather than an external benefit.
Perhaps there's guilt relieved by realising that a tedious week spent organising a mentoring group increased the amount of interaction as a mentor, but what are the benefits beyond that?