Although the evaluation of public policies is a subject of growing interest in Latin America, there are problems with the design and implementation of evaluations, as well as with the limited use of their results. In many cases, the evaluations have more to do with generating descriptions and less with assessing these activities and using those assessments to improve planning and decision making. These points are explored in a case study of the evaluation of a rural development program in Argentina, emphasizing the process of negotiation and consensus building between the evaluators and the official in charge of approving the evaluation report. The lessons learned from the experience point to the generation and consolidation of a culture of evaluation in the region.