The Handbook identifies the PMO as the essential integrator of the people, processes, and tools that manage or influence project performance. This book details how the PMO applies professional project management practices and successfully integrates business interests with project goals. The Handbook focuses on establishing PMO functionality to meet the requirements of project stakeholders. It presents 20 pertinent PMO function models, providing guidance for developing PMO operating capability that is applicable to any organization. It also presents these functions relative to five stages of progressive PMO development, demonstrating potential PMO growth from simple project control up through its alignment within a strategic business framework.