The Best Damn Management Book Ever

Turns out the problem was a screw that needed to be turned one-quarter of a turn. An eighth of a turn and it's too loose; half a turn and it's too tight. These screws were being installed manually on an assembly line. You could blame the workers for sloppy work but, as it happens, nobody in management had ever told the workers why it was critical that each screw be turned exactly one-quarter of a turn.