This document provides an overview of change management for HR professionals. It discusses the psychology of change and how people resist change. It defines organizational change and change management, and outlines different change management models. The document also discusses assessing organizational readiness for change by analyzing employee reactions, readiness, and resistance. Managers play a key role in change by communicating the need for change and coaching employees. Readiness is assessed before, during and after change using surveys, interviews and observations.