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This article critically reviews 11 participatory ergonomic interventions carried out in Québec by the Occupational Health and Safety Research Institute (IRSST). In the introduction, the characteristics of the approach used are situated in relation to the literature on this subject. Based on the "Ergo team" formula, the approach aims to provide company personnel with the skills to analyze and correct hazardous workstations in relation to musculoskeletal disorders (MSD), using an analysis process that the researchers developed. Although isolated workstations were corrected, the process aims for more general impacts on the company. In the 11 interventions, 40 work situations were analyzed, and in 31 cases, changes were implemented to reduce MSD risks. The most common changes dealt with the tools/equipment (77.4% and physical layouts (84%); changes involving work methods (29% and work organization (12.9%) were less common. The difficulties encountered in the interventions are summarized, and the possible impacts of the interventions on the organization and psychosocial factors are discussed. The authors then address the limitations of the paper and the factors that should be considered in evaluating such a participatory process. The authors conclude that the participatory process was successful in implementing changes in companies and that other studies are necessary for a better understanding of the process and its impacts. [ABSTRACT FROM AUTHOR]