This section describes the definition of Project Management Office and the related standards.
| Organisation | Standard | Definition | Certification |
| Project Management Institute Project Management Institute | PMI | NA | Project Management Office – A management structure that standardizes the project-related governance processes and facilitates the sharing of resources, methodologies, tools, and techniques. See also program management office. | NA |
| AXELOS Global Best Practice Solutions | AXELOS | Portfolio, Programme and Project Offices P3O® 2013 Edition | Portfolio, Programme and Project Offices (P3O) – The decision enabling and support business model for all business change within an organization. This will include single or multiple physical or virtual structures, i.e. offices (permanent and/or temporary), providing a mix of central and localized functions and services, integration with governance arrangements and the wider business such as other corporate support functions. | P3O® Project Office Foundation P3O® Project Office Practitioner |