the Peter Principle holds that in a hierarchy, members are promoted so long as they work competently. Sooner or later they are promoted to a position at which they are no longer competent (their “level of incompetence”), and there they remain being unable to earn further promotions. As Andy Grove points out in his management classic High Output Management, the Peter Principle is unavoidable, because there is no way to know a priori at what level in the hierarchy a manager will be incompetent. Another challenge
