With this release, ISO 50001:2011 will be withdrawn three years from this publication date. To keep a certificate valid after this deadline, organisations need to make sure their certificate is transitioned during the 3-year period. Some  key changes in this new version include greater emphasis on the role of senior management, updates to terms and definitions and clarification of  the energy performance indicator (EnPI) and energy baseline (EnB) text to provide a better understanding of these concepts.


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