“…Several excellent reviews and numerous studies have been devoted to identifying work-related MSD risk factors (14)(15)(16)(17)(18), how to assess exposure to these risk factors (19)(20)(21)(22)(23), physiological mechanisms explaining MSD (24,25), effective levels of action (5,26,27), ergonomics effects of changes caused by rationalizations (28), and outcomes of interest to ergonomics interventions such as health (29,30) and profitability (31)(32)(33). While these issues are central to the understanding of how to design an effective intervention, they do not address the process of change per se.…”