This is a somewhat specific detail, but it comes up a lot, so I wanted to pull it out. If you run a bunch of 5 Whys, you’ll find that a lot of times, the developer who made the first-order mistake (forgot to copy configs from QA to Prod, or deployed two apps out of order, or whatever), will say “Look, this was totally my fault, I screwed up, that’s the whole story. I’ll be more careful next time.”
The very short summary of which is: We’re going to fix this problem by being less stupid in the future.
Which, well, you can guess how that’s going to turn out.