This report provides guidelines for evaluators, evaluation and programme managers, policy makers and funding agencies on how to take advantage of the rapidly emerging field of big data in the design and implementation of systems for monitoring and evaluating development programmes. The report is organized into two parts. Part I: Development evaluation in the age of big data reviews the data revolution and discusses the promise, and challenges this offers for strengthening development monitoring and evaluation. Part II: Guidelines for integrating big data into the monitoring and evaluation frameworks of development programmes focuses on what a big data inclusive M&E system would look like. The report also includes guidelines for integrating big data into programme monitoring and evaluation.