ISO 50001 is a standard for energy management systems that is applied globally. Like EMAS and ISO 14001 it is open to and can be used by any type of organisation.
The PDCA-cycle is included in the standard, the aspects, however, focus on energy issues only. The standard deals with energy sourcing, use of energy and energy efficiency throughout the organisation as well as production-related and non-production-related consumption of energy. As an authorised environmental verifier I can issue certifications for those branches which I am accredited for.