Sustainable occupational safety and health interventions: A study on the factors for an effective design

•Effective interventions are a leading priority in dynamic and unpredictable contexts.•Participatory approaches can be one way to ensure interventions’ sustainability.•A multi-step design process sets how to develop the intervention’s initial stages.•Processes, scenarios, and actors were detailed for the longevity of the intervention.•An Italian OSH intervention for a near-miss management system is taken as a reference.