Maintenance Terms and Definition (Part 2)

·         Maintenance concept: A statement of the overall concept of the item/product specification or policy that controls the type of maintenance action to be employed for the item under consideration.

·         Maintenance plan: A document that outlines the management and technical procedure to be employed to maintain an item; usually describes facilities, tools, schedules, and resources.

·         Reliability: The probability that an item will perform its stated function satisfactorily for the desired period when used per the specified conditions.

·         Maintainability: The probability that a failed item will be restored to adequately working condition.

·         Active repair time: The component of downtime when repair persons are active to effect a repair.

·         Mean time to repair (MTTR): A figure of merit depending on item maintainability equal to the mean item repair time. In the case of exponentially distributed times to repair, MTTR is the reciprocal of the repair rate.

·         Overhaul: A comprehensive inspection and restoration of an item or a piece of equipment to an acceptable level at a durability time or usage limit.

·         Quality: The degree to which an item, function, or process satisfies requirements of customer and user.

·         Maintenance person: An individual who conducts preventive maintenance and responds to a user’s service call to a repair facility, and performs corrective maintenance on an item. Also called custom engineer, service person, technician, field engineer, mechanic, repair person, etc.