Return on investment
Calculating whether the mentor/mentee training has been cost-effective is a difficult process. Jack J. Phillips is well known in the area of Return On Investment (ROI) evaluations. He describes a basic five-step formula for calculating ROI.
Collect level-4 evaluation data by asking, ‘Is there a change in job performance that is positive and measurable?’
Isolate the effects of the training from other factors that may have contributed to the results.
Convert the results to monetary benefits.
Total the cost of training.
Compare the monetary benefits with the costs. The non-monetary benefits can be presented as additional, though intangible, evidence of the programme's success.