This document discusses change management and organizational development. It defines change management as planned efforts to introduce and implement changes that are accepted by most through behavioral science interventions. Organizational development is defined as planned, organization-wide change managed from the top to increase effectiveness through interventions in people, processes, and procedures using behavioral sciences. Several models of change management are presented, including John Kotter's 8-step model. The document also discusses understanding and managing resistance to change, and implementing change through various interventions and systems of control. The overall message is that change is inevitable, so we should try to welcome and embrace change.