This document provides information on performance appraisal methods for corporate buyers. It discusses 12 different methods: 1) Management by Objectives, 2) Critical Incident Method, 3) Behaviorally Anchored Rating Scales, 4) Behavioral Observation Scales, 5) 360 Degree Performance Appraisal, 6) Checklist and Weighted Checklist Method, and others. For each method, it provides a definition and overview, as well as advantages and disadvantages. The document aims to inform on different approaches that can be used to evaluate a corporate buyer's job performance.