Mean Time Between Failure (MTBF) is a measure of the reliability of a system or component, calculated as the average time between failures. It is used to estimate the expected time between system or component failures, and is typically expressed in hours, days, or years. MTBF is an important metric for maintenance operations and management, as it helps to identify potential problems and plan for preventive maintenance. MTBF is calculated by dividing the total operating time of a system or component by the number of failures that occur during that time. It is important to note that MTBF does not take into account the severity of the failure, only the frequency. CMMS software can be used to calculate MTBF.