I can get a warehouse shift organized and keep the orders flowing now. But then one station backs up, or two guys who can't stand each other get put on the same line, and the whole thing snarls. I've gotten good at the plan, and the people and the pinch points still trip me up.
More people experience this than they realize.
You can coordinate the shift but bottlenecks and clashing personalities still trip you up.
If this sounds familiar, the Library can help you find the bigger picture.