* The Peter Principle is a concept in management theory in which the selection of a candidate for a position is based on the candidate’s performance in their current role, rather than on abilities related to the intended role. Thus, “managers rise to the level of their incompetence.”
As a means to obtain this leverage, a manager must understand, as Andy writes: “When a person is not doing his job, there can only be two reasons for it. The person either can’t do it or won’t do it; he is either not capable or not motivated.” This insight enables a manager to dramatically focus her efforts. All you can do to improve the output of an employee is motivate and train. There is nothing else.