TL;DR: I love the flexibility at my job, but I'm a recent grad with no mentor and unable to quantify performance.
Some Background:
I'm a recent grad working at a small startup focused on research and development. This is my first gig, and I've been here for a little over a year. My supervisor has immense domain knowledge, but suffers from being spread too thin across the company and doesn't have time/energy to mentor me.
Main
Since I've been hired, I've taken the initiative and implemented a few design tools to help us in our R&D work. I work as a researcher, and I'm having trouble quantifying my own performance. My job is flexible, but maybe a little too flexible - I have no KPIs with which to quantify my own performance and that is raising doubt.
Since I don't produce anything besides ideas and reports, I don't have anyway to quantify my performance. I am considering asking my boss and/or director for a PIP, but I'm wondering if there are things that this community can recommend I can ask of myself instead.