Sustaining system improvement is the purpose of this book. It is based on years of technical assistance and management experience in a variety of manufacturing, service, and public sector organizations. This book describes how to plan and manage changes during implementation activities so solutions truly become the new routine. The action steps described, which on their own can be applied when making all types of modifications, are framed in a three stage model first proposed by Kurt Lewin the father of change theory. It packages a strategy for sustaining improvement in a context that is easy to understand and apply.