Engineering Management Hacks: The BigBook Technique is an amusing story of how a group of engineers got their management to pay attention to Brooks's Law ("Adding manpower to a late software project makes it later"). I won't spoil the punchline; read it yourself.

Around here we don't have problems with Brooks's Law, perhaps because we don't have the extra manpower to add to late projects to start with.

(From Daring Fireball.)