Willingness, capacity, and opportunity are simply referred to in the theory of work performance. The theory of work performance emphasizes these three entities: willingness, capacity, and opportunity to obtain a high level of work performance. Capacity can simply be referred to as a cognitive and physiological ability, which enables someone to carry out or perform an activity effectively.
Willingness refers to a measure of the degree of the extent to which a fellow is inclined and submissively committed to carrying out such activity or task. The opportunity itself can be explained to be a sort of unplanned occurrence that creates a platform for an event or task to be carried out.
Blumberg and Pringle, in the year 1982, proposes these three dimensions in judging the performance of an individual on a particular task or the other. They (willingness, capacity, and opportunity) are yardsticks we can use to access an individual in carrying out a particular task.