I think the way sales manager handled Joe's performance was not positive. In order to improve someone's performance feedback plays a very important role, and CONSTRUCTIVE feedback to be specific.
Constructive feedback is based on the principle of "plus/delta": in its first part, it contains information that has been successfully and effectively in the activities of man. After that, talking about what could be done more or differently, so the behavior was more effective. This form of behavior analysis is motivating for adults, allowing not only new skills, but also to analyze the experience and continue ...