Net-cost model for workplace interventions.

PROBLEM Few methods exist for comprehensively examining the costs and benefits of ergonomic interventions applicable to a variety of economic sectors and settings. METHODS An instrument for data collection and data analysis at the facility level is presented. In this net-cost model intervention costs are defined by equipment and labor costs for the interventions as well as the avoided costs of lost work time, medical care, and productivity improvements. RESULTS Net-cost estimates for three case studies show that ergonomic interventions applied appropriately can result in substantial cost savings for the companies. DISCUSSION It would be prudent to incorporate a protocol for collecting cost and effectiveness data in the standard operating procedures of companies introducing ergonomic interventions. Validation of the net-cost model through prospective studies is necessary. IMPACT ON INDUSTRY This model may be used to determine the net-cost of implemented or proposed ergonomic interventions in industrial facilities.