When performing maintenance tasks that require significant financial investment investors should expect tangible results, and if these results are not satisfactory enough, the investment must be redesigned. With the application of OEE it is possible to continuously monitor measure, identify and quantify the efficiency of the maintenance process, assessing how much a failure affects the whole facility, and facilitating the evaluation of the suitability of the different improvement proposals. This process represents a balanced view of the elements that are most important to initiate specific and targeted improvements to the problems identified.