本文件为组织制定分阶段实施能源管理系统（EnMS）的方法提供了指导。这种分阶段的方法旨在支持和简化所有类型组织，尤其是中小企业（SMO）的EnMS实施。 本文件给出了十二个核心要素的使用指南，每个要素有四个成熟度级别，以建立、实施、维护和改进EnMS，从而提高能源绩效。 它使该文件的使用者能够实现阶段性的方法来实现适合于其目标的能量管理水平，并建立一个坚实的基础，随后可以扩展到满足ISO 50001的要求: 2018年。本文件符合ISO？50001:2018，但未涵盖其所有要求。

This document gives guidance for organizations on establishing a phased approach to implement an energy management system (EnMS). This phased approach is intended to support and simplify the implementation of an EnMS for all types of organizations, in particular for small and medium-sized organizations (SMOs). This document gives guidance on the use of twelve core elements with four levels of maturity for each element to establish, implement, maintain and improve an EnMS that results in energy performance improvement. It enables the user of this document to implement a phased approach to achieve a level of energy management appropriate to its objectives and to build a strong foundation which can subsequently be extended towards meeting the requirements of ISO 50001:2018. This document is consistent with ISO？50001:2018 but does not cover all of its requirements.