PA can improve motivation and performance, but if used inappropriately, it can have disastrous effects (Fisher et al, 2003). For PA to be effective, it must of necessity be anchored on the performance criteria that have been outlined for the job. Riggio (2003) describes performance criteria as the means for determining successful or unsuccessful job performance. They are one of the products of a detailed job analysis. Performance criteria spell out the specific elements of a job and make it easier to develop the means of assessing levels of successful or unsuccessful job performance. It can thus be inferred that an appraisal system not hinged on this all important criteria, can neither be appropriate nor fair, particularly to the employee, whose performance is being evaluated. In fact, some key points in the arguments of those opposed to performance appraisal is that, most of the time, wrong things are rated and the wrong methods used (Deming, 1986; Gilliland and Langdon, 1998).