In accordance with regulation 7.4 of the Regulations and Rules Governing Programme Planning, the Programme Aspects of the Budget, the Monitoring of Implementation and the Methods of Evaluation (ST/SGB/2000/8), the present report is the thirteenth in a series of studies that have been submitted to the General Assembly through the Committee for Programme and Coordination. Using both qualitative and quantitative methods and covering the 2010-2011 biennium, the Office of Internal Oversight Services (OIOS) assessed the Secretariat’s evaluation capacity, quality and utility and identified key results contained in evaluation reports. This biennial study also presents the OIOS evaluation workplan for 2014-2015 and describes OIOS follow-up to prior Committee recommendations aimed at improving the quality of Secretariat evaluations.