The document discusses performance appraisal, including its purposes, methods, biases, and ways to overcome problems. It describes several methods of appraisal such as written essays, graphical rating scales, behaviorally anchored rating scales, appraisal by objectives, and balanced scorecard. It also discusses biases that can occur like leniency error, halo error, and defensive reactions. Finally, it provides suggestions for overcoming issues, such as using multiple criteria and evaluators, focusing on training over rewards, and careful record keeping.