Not the OP but sounds like Google’s “Perf” process. You can take a search through HN and get a couple of accounts. Generally; you write how well you did, then you get a couple of peers to confirm it and give you feedback. Then your manager works with a bunch of other managers to “calibrate” to make sure their view of the world is not skewed (think you did poorly but you actually did well and vice-versa). Then you receive a rating based on that calibration.