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With the increased reliance on IT systems, companies are becoming increasingly vulnerable to the massive costs and harmful impacts related to system failures. Therefore, it is essential to measure, track, and improve the amount of time a system is functioning properly. With the use of key IT metrics to measure availability, companies can evaluate their systems' current resistance to downtimes, identify areas that require attention, and improve overall system efficiency.
Availability is the amount of time a system is working at its full functionality during the time it is required to do so. The key metrics involved in measuring availability are Mean Time Between Failure (MTBF), sometimes referred to as Mean Time to Failure (MTTF), and Mean Time to Repair (MTTR).