Twelve O'Clock High is a masterclass on running a software project. The higher-ups can see that something is wrong with the team; it's not performing as well as it ought to. The outsider comes in, figures out what the problems are, and fixes them. Not an easy fix, not a quick one, and it takes an awful toll on several people. But the team ends up working well again.
I show this movie to everyone I can. It's full of lessons.