Use geometric reasoning. If you expect every manager to spend a fortieth of their time on each of their (forty?) direct reports' projects, then that would imply

Use geometric reasoning. If you expect every manager to spend a fortieth of their time on each of their (forty?) direct reports' projects, then that would imply that across two levels, there's only about a minute of consideration, and for three levels, less than two seconds. On the other hand, maybe this explains why upper management is always so disconnected.