This International Collaborative Research Project (ergonomics and public health) is positioned under Axis 4.1 - "Innovation, work". It aims to produce knowledge to support social innovations in terms of prevention of occupational accidents and diseases, both at the level of regulations and dynamics of productive organizations (micro and meso level), and at the level of public surveillance (macro level). This proposal is rooted in the context of the importance of work accidents in Brazil and their stagnation in France (which hides an increase in accident rates among women). We apprehend prevention as a collective activity distributed over time, space and multiple partners. The activity of prevention can be conceptualized as a partially improvised orchestration of collaborative performance (Engeström, 2008). This research aims to: 1) understand this distributed collective activity of prevention at three levels (macro, meso, micro); 2) identify systemic contradictions and potential areas for development of this collective activity; 3) support innovation in this collective activity of prevention by mobilizing participatory methodologies: Change Labs (Virkkunen & Schaupp 2008), simulation methods from the critical pedagogy (Freire, 1970), MAPA (Almeida e Vilela, 2010; Almeida et al. 2014); (4) Develop a safety culture by articulating three levels of prevention activity; (5) To extend this knowledge and methods, not very common in France and Brazil, to other sectors. The expected impacts are: more effective and systemic prevention; the development of the actors involved in the process; and a transfer to civil society. This work will be done in France and Brazil on fields of research enabling comparison and mutual support. This project will remove the scientific and technical obstacles concerning: - Clarification of human, work and prevention at work models supported by national occupational risk prevention programmes in the two countries; - Understanding the issues (socio-organizational, financial and technical) related to the genesis and conduct of prevention projects in productive organizations; - The proposal of a model for a participatory support approach for prevention actors in these projects - The development of integrated models (ergonomics, public health/intercultural researches) around key concepts related to the design of sustainable work situations, such as "decent work" (one of the objectives for the development of the International Labour Organisation-ILO) The driving force behind the collaboration project is the combination of expertise in occupational risk prevention. French-speaking ergonomics, born in Cnam-Paris, has developed work analysis methods that have proved their worth. The transformation of work situations has been increasingly developed since the 1990s. However, to date, some locks have often been lifted. The change laboratory's methodology developed in Finland and successfully implemented in Brazil seems to be an approach that will bring up the intervention-research on the issue of prevention. Moreover, the multidisciplinary nature of the SHS and Public Health associated with an international collaboration project represents a challenge, that of not simply juxtaposing approaches and cultures, but truly bringing them into dialogue, particularly in the field. Four French laboratories are involved: CRTD-Cnam, Paragraphe-Paris8, Epicène-Bordeaux University, CEREP-Reims University. Seven Brazilian public institutions are represented in this project, under the coordination of Prof. Vilela (University of Sao Paulo). These are a Foundation for Research on Occupational Health (FUNDACENTRO), the Universities of Sao Carlos (USFCAR), Campinas (UNICAMP), East Sao Paulo (UNESP), Itajuba (UNIFEI), Sergipe (UFS).