Improving intervention practices is now a key challenge in the field of preventing work-related musculoskeletal disorders (MSDs). Advancing knowledge regarding workplace interventions is therefore a key research priority, which brings the topic of intervention evaluation to the forefront. International research in the field of MSDs largely focuses its work and recommendations on evaluating the effects of interventions through changes in the symptoms of affected workers and/or changes in exposure levels. In this text, we first demonstrate that this approach requires meeting a number of important conditions, which are often difficult to fulfill and generally underestimated. We propose incorporating indicators related to work activity and employees’ room for maneuver as complementary evaluation criteria, while emphasizing the need for further work to make them operational. Second, we note that evaluating the effects of an intervention is insufficient for developing knowledge about the intervention: this necessarily requires a precise description of the intervention process and consideration of the context in which it takes place. Finally, the discussion highlights the fact that, from our perspective, the evaluation of interventions constitutes a project in itself, one that directly contributes to the transformation of work. (R.A.)