A nuclear power plant training manager once told me that he justifies buying a $15M simulator by comparing the investment to the cost of a nuclear disaster. Unfortunately, it is not so straight forward to make a case for the Return-on-Investment (ROI) of maintenance fatigue interventions. It is difficult to prove that fatigue awareness training will prevent an airplane accident. (p. 3).
Although direct data could not be retrieved to measure the success rate, a comparison or prior and post MRM implementation of performance measures such as aircraft ground damage, personnel injuries, departure times, remain overnight (RON) averages, maintenance on-time,