After a foreword trying to link my trajectory to the theoretical choices that are recurrent in my work, the memory is made up of two parts. A first part of a description and analysis methodology that combines the management situation concept developed by Jacques Girin and the network actor theory by Madeleine Akrich, Michel Callon and Bruno Latour (2006). A second part, specifying the epistemological aspects of this methodology and fine-tuning a survey tool. This methodology applies to social experiments around access to sustainable food for families and people in precarious situations. All these experiments pose the challenges for the participation of the persons concerned; they are part of a food democracy approach with the aim of ecological transition. It is usual to present the epistemological anchorage first and then to declassify it in research work. Another choice is to show through the development of a description methodology that what guides me is a socially focused research posture. I would thus like to demonstrate that this is an approach specific to research in social work (decrees) in the scientific context of management sciences.