This document provides the users with a common understanding of the concepts and principles of Community-Managed Disaster Risk Reduction, defines common terms used, describes its evolution, and distinguishes it from other models. It provides practical knowledge and guidelines on how to implement, operationalize, and institunalize DRR at all levels of development organization, by detailing the roles of each organizational level, by providing the components and tools to fully implement a project, and by answering the questions of what, why and how to successfully do it.