Effective executives know this and check up (six to nine months later) on the results of their people decisions. If they find that a decision has not had the desired results, they don’t conclude that the person has not performed. They conclude, instead, that they themselves made a mistake. In a well-managed enterprise, it is understood that people who fail in a new job, especially after a promotion, may not be the ones to blame.
- From “The Effective Executive: The Definitive Guide to Getting the Right Things Done”
by Peter F. Drucker