"In this phase of the project, Phase 2, the draft framework was tested through local level case studies in four Canadian provinces. The case studies are part of the Healthy Communities: An Approach to Act on Health Determinants in Canada project, funded by the Coalition Linking Action and Science for Prevention (CLASP) and conducted by a coalition of Healthy Communities networks across Canada. The usefulness and relevance of the key elements of the draft framework were critically analyzed, based on the results of the case studies. The following paper briefly reviews the draft conceptual framework, and then describes the ways that the work of five Healthy Communities committees, in four provinces, as they supported the development of healthy public policies in their communities. The paper concludes with a set of questions that remain-questions that could be addressed in future projects."--Introduction.