How does ISO 50001 fit with existing standards?

Do you already have  ISO 9001, ISO 14001 certification?

ISO 50001 is based on similar standards (e.g. ISO 9001 and 14001).  If your organization has implemented one of these, adding ISO 50001 is much quicker and less costly.  Also, this similarity makes it easier for organizations to integrate an EnMS into their quality and environmental management programs.