This document discusses different ways to measure employee performance and results. It describes key performance indicators (KPIs) and objectives and key results (OKRs) that are used to track progress towards goals. Employee self-assessments, peer reviews, and manager evaluations also provide feedback. Comparative measurement systems rank employees against each other or standards, using methods like simple or alternating rank order, paired comparison, and relative percentiles. Absolute methods like essays, behavior checklists, critical incidents, and graphic rating scales evaluate employees without direct comparisons. Measuring performance helps ensure employees are focused on priorities and making progress.