Portfolio, Programme and Project Offices (P3O®) Translations
P3O is best practice guidance from AXELOS. It was published in November 2008 and is accompanied by a qualification scheme.
Portfolio, Programme and Project Offices (2008)
The updated 2017 guidance, its first since 2009, places a strong emphasis on the scalability and flexibility of the method and on how best to tailor it to the complexity and specific requirements of a project.