The document provides an overview of performance appraisal purposes, highlighting its role in evaluating employee performance and categorizing them into performers and non-performers, with subsequent rewards or disciplinary actions. It discusses various performance appraisal methods such as ranking, rating scales, checklist, critical incidents, essay, and behaviorally anchored rating scales, detailing their advantages and disadvantages. Additionally, it offers resources for further information on performance appraisal tools and techniques.