Systems for Action evidence briefs cover a range of topics. Briefs synthesize findings from completed S4A research studies and serve as tools for communities, researchers, and decision-makers. Click below to access individual briefs and learn what solution was tested, the research findings, and recommendations for action based on this evidence. Systems for Action evidence briefs cover a range of topics. Briefs synthesize findings from completed S4A research studies and serve as tools for communities, researchers, and decision-makers. Click below to access individual briefs and learn what solution was tested, the research findings, and recommendations for action based on this evidence.