This is a quick breakdown of the 3 types of Project Management Offices (PMOs).
- Enabling (Supportive) — Provides best practices, templates, and tools “as needed,” and compliance is voluntary.
- Delivery (Controlling) — Adopts framework or methodology, policy, and repeatable procedures, and a certain level of the standards are enforced.
- Compliance (Directive) — Establishes strict standards, measures, and control over projects, and these are highly regulated.
A good place to start is with an enabling/supportive PMO and then progress to a more delivery/controlling model. Generally, a compliance/directive PMO is for more highly regulated organizations.