This paper presents an analysis of evidence from seven case studies of results-based management by development co-operation providers. Analysis of themes from the case studies reveal six interrelated challenges which providers face in their efforts to manage for the results of development co-operation. The six challenges are: linking results to development goals, ensuring the purpose of results systems is well-defined, weighing up the benefits of aggregating and attributing results from standard indicators, enabling country ownership, using performance information alongside results information, and building and embedding a results culture. Providers continue to adopt a range of approaches to pursue a focus on results and there are many examples of good practice. The case studies suggest that in a complex development landscape some providers are prioritising the use of aggregated results information for domestic accountability, communication, and performance management over their use for learning and policy direction. In this context, the paper argues that in agency-wide results frameworks development co-operation results are often detached (or de-contextualised) from development results and discusses the implications of this, including the use of standard indicators to measure aggregated outputs. The paper uses case study evidence to discuss and suggest practical ways providers can build and maintain a strong results focus which enables analysis, insights and learning, and has achievement of development outcomes as its objective.