The impact assessment study of the CFC/ICAC/33 Project has been planned to measure the adoption of instrument testing and its requirements by cotton stakeholders, both worldwide and in Africa. Several criteria were used for recording information along the duration of the Project, as well as a questionnaire specially designed for this Project. Results show that the results from the international activities of the Project are well perceived and that they will continue carrying results on the long run. According to the African specific activities, some activities already brought their impact while other activities, requiring large investments and/or adaptations in the countries will only bring their impact in a few years' time.