We designed this project to encourage substantial stakeholder involvement. To be useful, the guidance that results must address the varied needs and reflect the diverse views of analysts, funders, and decision-makers as well as many others – including those affected by the policies to be assessed. The project structure includes a Leadership Team, an Advisory Group, several methods papers and case study authors, and numerous reviewers and commenters. We are very grateful to all these individuals for the many insights and substantial support they provided.