Not one PMO but many PMOs
The different activities covered by the PMO function

The PMBok ( Project Management Body of Knowledge ), a PMI reference – Project Management Institut – defines the role of the Project Management Office as follows :

"A Project Office is an organizational unit or entity charged with various responsibilities related to the centralized and coordinated management of projects within its domain. The responsibilities of a Project Office can range from the provision of project management support functions to direct responsibility for a project".

In the remainder of this document, the acronym PMO will be used to designate the Project Management Officer and not the Project Management Office.

The myth of the single PMO needs to be deconstructed first.

In fact, there are a number of criteria used to define the PMO and the activities he/she will have...