360-degree reviews: We solicit anonymous input from your boss, your peers, and your subordinates. A reviewer goes through all of that information, discusses it with you, and, perhaps, shares with you documents containing parts or all of the anonymous responses.
These are remarkably helpful tools. They’re helpful, first, because you know that they’re coming. If you’re going to be evaluated by everyone in the neighborhood, then you’re more likely to be civilized and fair to everyone in the neighborhood. (“Civilized and fair” doesn’t mean “easy” or “letting others break the rules.” It means “civilized and fair.” If someone’s performance needs improving, you talk reasonably with that person about his or her weaknesses and how to improve. You don’t belittle people or scream at them, because incivility will surely come back to haunt you at 360-degree review time, and you know that 360-degree review time is lurking in your future.)
360-degree reviews are helpful because you critique others. It’s relatively easy — or, at least, routine — to be asked to critique folks situated beneath you in a hierarchy. But it’s a little different to be asked to critique folks who are situated horizontally or above you. When you’re asked to critique those people formally, it makes you think a little harder: What are those people doing right? What are they doing wrong? What information should they hear about their performance?