This thesis intends to evaluate, develop and test different qualitative methods and ways of ex-post assessing the impacts and contribution of the research on innovation processes and the society, in relation to the transition to organic agriculture.We have conducted two case studies focusing on the transition to organic farming. First is the Camargue case (in France) that encompasses a broad range of technical innovations. Second is on the development of the organic product Ecostop to protect bees against the varroatosis disease in Bulgaria.We evaluate the potential of a broad approach based on the Participatory Impact Pathway Analysis (PIPA) and adapted & complemented by several other methods (first article, part 4), as well as the potenti...