If the PMO2000™/RCM maintenance analysis was done correctly, and the machine is maintained and operated according to the approved process, then it should suffer no unexpected failures. This is not to say that the plant will not fail. What it means is that all the failures the plant experiences will be expected. The unfortunate reality in most organizations is that some failure modes that receive preventive maintenance will fail unexpectedly. This means that even though some failure modes that have preventive maintenance activity to prevent them from occurring during production they still happen unexpectedly. These unexpected failures are known as Maintenance Capability Losses (MCL’s) and are shown below.
Model showing the definition of Maintenance Capability Loss
(MCL).