The 2018 version uses a common structure that makes it easier to integrate with ISO 9001 (Quality) and ISO 14001 (Environment).
Understanding the "Plan-Do-Check-Act" (PDCA) cycle as it was originally written. 3. Key Differences: 2011 vs. 2018 Download energie ISO 50001 V2011 pdf
Sites like IHS Markit or SAI Global maintain databases of historical standards. 2. Why the 2011 Version? The 2018 version uses a common structure that
You can purchase and download archived versions directly from the ISO website. Download energie ISO 50001 V2011 pdf