This document provides a lessons learned report on the United Nations Development Assistance Framework (UNDAF) for the Philippines from 2005-2009. It discusses the formulation process, design, implementation through theme groups, and efforts towards "Delivering as One" and joint programming. Key findings include that the UNDAF was not well aligned with national planning cycles, theme groups faced challenges in functioning, cross-cutting issues were not adequately addressed, and "Delivering as One" has progressed but not yet been fully implemented in areas like common premises and a single programming framework. The report aims to inform the development of the new 2012-2016 UNDAF.