Despite what some people have claimed on HN, your manager can't deny you from having a 20% project if you want one.
Theoretically, managers can't block you from having 20% time, and there's no official permission process you need to go through to take it, but if your manager says, "I'll fuck you over in Perf if you do a 20% project", then you don't have 20%-time.
What I'm told is that, before 2007 or so, Google actively worked to avoid manager-as-SPOF, and that this is what made Google great. But then they hired a bunch of executives from mainstream large companies and didn't tell them to wipe their fucking feet off before coming inside.
> if your manager says, "I'll fuck you over in Perf if you do a 20% project", then you don't have 20%-time.
I find it hard to imagine a manager could get away with saying that, but even if they did, I think it would be an empty threat. Perf is designed so that the manager is not a SPOF, your peers' reviews are considered at least as important as your manager's review. It would be pretty obvious if there was a big discrepancy between what your manager says and what your peers say, which would call your manager's review into question. The only way this would be a problem would be if your peers give you bad reviews too (and if that's the case, then maybe, just maybe, you need to take a look at yourself).
Theoretically, managers can't block you from having 20% time, and there's no official permission process you need to go through to take it, but if your manager says, "I'll fuck you over in Perf if you do a 20% project", then you don't have 20%-time.
What I'm told is that, before 2007 or so, Google actively worked to avoid manager-as-SPOF, and that this is what made Google great. But then they hired a bunch of executives from mainstream large companies and didn't tell them to wipe their fucking feet off before coming inside.