According to the goal-setting theory of motivation, two critical factors contributing to goal achievement are goal specificity and feedback. Specific goals are clear and measurable, which helps individuals understand what is expected of them. Self-generated feedback allows individuals to monitor their own progress, make necessary adjustments, and stay motivated. In this scenario, the individual set a specific goal of selling an average of 10 items per call and making 25 sales calls, and kept a tally of calls and sales, providing self-generated feedback. Reference: Locke, E.A. & Latham, G.P. (2002). Building a Practically Useful Theory of Goal Setting and Task Motivation. American Psychologist.