The success of projects under the PMO (Project Management Office) mandate is not always a direct reflection of the PMO's success. This relationship depends heavily on the specific roles and responsibilities of the PMO. The PMO can play several roles, ranging from support and guidance to actual project management execution, and each role influences how project outcomes correlate to PMO performance.

If the PMO's main function is limited to providing tools, templates, or basic oversight, then it operates more as a support function. In this case, the success of individual projects may not directly translate into a measure of PMO success because the projects' performance relies primarily on the project managersand teams rather than the PMO itself. Using a correlation between project outcomes and PMO performance would not make sense in this context​​.

However, if the PMO is more involved in critical project decisions, such as prioritization, resource allocation, and governance, then project success could be more directly linked to the PMO’s effectiveness. In this case, successful projects could reflect the PMO's ability to support or steer the organization towards achieving strategic goals​​.

A nuanced understanding of the PMO's role is necessary to assess its performance fairly. Therefore, while the success of projects might increase the perception of the value of the PMO, it is only a partial indicator, depending on what specific functions the PMO is executing​​.