Abstract: The Paris Declaration Evaluation faced the challenge of as-sessing the effects of a policy compact between nations, an area in which evaluation thinking and practice is still emergent. It also confronted the challenge of attempting to link development results to the implementation of a broad reform agenda in coun-tries of widely differing circumstances. This article describes how the Core Evaluation Team, in consultation with the management and governance structures of the Evaluation and the evaluation teams involved, addressed these challenges. It describes the development of the evaluation questions, the methodological framework, and how the methodology worked in practice. High-lights include ensuring the use of evidence throug...