Portfolio, programme and project offices are widely used to support best-practice in organizations of all sizes, across public and private sectors. This Portfolio, Programme and Project Offices (P3O®) publication builds on the references in PRINCE2®, Managing Successful Programmes (MSP®), and Management of Risk (M_o_R®) and Management of Portfolios (MoP®) to provide a single information source for organizations or individuals wishing to set up or maintain an effective delivery support office. Portfolio, Programme and Project Offices describes how to create tailored governance and support structures for managing portfolios, programmes and projects. It includes guidance for building a business case, and funding models for set-up and ongoing costs. Different types of office are considered, together with the roles and services that may be carried out.