It is through these evaluations that a manager supply chain performance or supervisor can see just how effectively an employee is working within their department and what if any thing needs to be done to improve their effectiveness. Plus it is these evaluations which provide the employee with a chance to learn just how effective they are being and help them with guidance in relation to the career and goals. It also provides the employee with a chance to air any grievances or problems they may be having in relation to their job and their performance.