The Performance Gap is simply the difference between the employee’s current and desired performances. The gap doesn’t have to be bad. While it could be the result of underperformance, it could also be your star employee who wants to become a supervisor. Their current performance is star. Their desired performance is supervisor. The gap is what she needs to do to get from one to the other. Virtually all employees have a performance gap of some sort and performancepartners can help you figure out what it is.