This book provides readers with practical information for understanding and developing an ISO 50000 Energy Management System (EnMS), including explaining in clear English the detailed standards and requirements, which are written in complex legalistic language. Building from chapter to chapter, the book leads readers from first principles into successively more detailed EnMS topics. It provides comprehensive direction for developing, implementing, and managing an EnMS. The text also explains the relationship between ISO 9000 and 14000 and provides guidance for integrating EnMS concepts with existing organizational policies, processes, and procedures.