A primary management use of this quantitative assessment model is to estimate the overall net cost savings from operating an entire on-site occupational health nursing program. 2. Another management use of this model is to estimate the net cost savings contributed by individual occupational health nursing services included in the on-site program. 3. The exclusive focus of the model on the net cost savings arising from the direct substitution of on-site for off-site occupational health nursing services can be extended with the application of a break even analysis. 4. A sensitivity analysis can be applied to factors of the model to help overcome the effects of substantial uncertainty concerning their estimates.