Performance appraisal means systematic evaluation of the personality and performance of each employee by his supervisor or some other person who is trained in such task. It is the formal procedure to evaluate the contributions of the persons working in the organization and to get the necessary information regarding the employees. Generally it is done by the immediate superior or an independent appraiser. Thus it is a rating technique for comparing the individual employees in the work group, in terms of personal qualities or requirement of their respective job.