This book provides a step-by-step approach to energy management, together with the use of a matrix tool for implementing energy management initiatives within an organization. The tool can help identify areas for improvement, prioritize energy management activities and maximize benefits. Most of the examples are from the built environment but the principles can be employed in any organization or industry sector. The guidance is applicable by anyone responsible for energy management in an organization, from board level to operational staff. In addition, the publication: * examines how data from sources such as BREEAM assessments, energy audits, energy performance certificates, display energy certificates and monitoring and targeting can underpin energy management * addresses asset and operational performance and discusses how information from both is needed to adequately assess the energy performance of a building * illustrates how undertaking an energy management programme can improve energy ratings * introduces the new energy management standard ISO 50001 and explains its contribution to an auditable energy management programme.