This document provides an overview of managing change in the workplace. It discusses various forces that can drive the need for organizational change, including external factors like technology and internal factors like changes in management. It then outlines Lewin's three-stage change model of unfreezing, changing, and refreezing. Alternative strategies for overcoming resistance to change are presented, such as the ADKAR model. Organization development is introduced as a way to create change through improved communication, employee development, and continuous improvement. Finally, examples are given of companies like PayPal, Google, Facebook, and Apple that succeeded by changing their business models when needed.