Reliability: the probability that equipment will not failĀ  in a given time period.

Maintenance: Any activity carried out on an asset in order to
- ensure that the asset continues to perform its intended functions
- repair the asset

Reliability Centered Maintenance (RCM): a methodology used to determine the right maintenance tasks, to ensure that any physical asset or system continues whatever its users want it to do, in its present operating context.

Click Here to access an RCM Powerpoint Presentation (54 slides).