Any decision that management makes, that anybody makes for himself or for other people, is prediction. The simplest plan is prediction, with a chance to be wrong. How may I get home tonight? I predict that my automobile will start and run, or that the bus will come, or that the train will come. I make plans. Those plans are predictions. Management is prediction; our lives are prediction. We predict what will happen. We try to choose a course of action that will react in favor of us. That's our aim. We predict the consequence of actions.
W. Edwards Deming, 1994