Seeking best practices: a conceptual framework for planning and improving evidence-based practices.

How can we encourage ongoing development, refinement, and evaluation of practices to identify and build an evidence base for best practices? On the basis of a review of the literature and expert input, we worked iteratively to create a framework with 2 interrelated components. The first - public health impact - consists of 5 elements: effectiveness, reach, feasibility, sustainability, and transferability. The second - quality of evidence - consists of 4 levels, ranging from weak to rigorous.