This document discusses performance appraisal methods in human resources. It examines ways to evaluate employees' quality, quantity, cost and time contributions and analyze successes, failures, strengths and weaknesses. The objectives of performance appraisals are to provide feedback, identify needs, form a basis for communication, and enable improvement. Popular appraisal methods include numerical rating systems, 360-degree feedback, management by objectives, behavioral observation scales, and behaviorally anchored rating scales.