This communication proposes a methodological framework to produce knowledge about collaborative activity performed during simulation workshop, on their productive and constructive dimensions. Producing knowledge about these situations may have two type of outcomes : an epistemic one dealing with a better understanding of (1) the productive and constructive potentiality of simulation, in line with the Constructive Ergonomics Approach (Falzon, 2014; Barcellini et al., 2014; Béguin, 2014; Béguin, 2003) and (2) the role of ergonomist in designing and managing simulation workhops. The proposed methodological framework is anchored in more than thirty years of research about collaborative design situations (e.g. Darses, Détienne, Visser & Falzon, 2001). Grounded in this initial framework we propose additional methods to address the constructive dimensions of collaborative design activity (Barcellini, 2015): (1) the analysis of roles of participants-in relation to the functions of their verbal interactions-and their various forms all along design interactions , as a revelator of the constructive potentiality of interactions ; (2) the analysis of the development of the project in which participants are engaged , thanks to the analysis of intermediary objects produces.