"This handbook provides investors, businesses and private sector development practitioners with an overview of tools and methods for effective and appropriately tailored data collection for impact measurement and management. It builds on the recognition that the methods of larger, independent impact evaluations of, for example, government-funded programmes rarely lend themselves well to a private sector context. In reviewing select private sector-relevant tools and methods, it draws out how such tools can deliver impact insights while often feeding valuable business intelligence back into companies."