HR evaluation aims to determine the value and impact of HR practices on organizational goals and performance. It helps justify the HR function and demonstrate its contribution. There are various approaches to HR evaluation including stakeholder surveys, return on investment analysis, benchmarking, and balanced scorecards. Key measures include staffing metrics, training costs and participation rates, employee attitudes, and organizational outcomes like productivity and profits. Accurately evaluating HR impact faces challenges due to many influencing factors and difficulty quantifying some benefits.