Mean Time Between Failures
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[edit] General
The calculated time interval between failures within a system. Used as a metric to enable the designers to determine risk versus cost of system components. A low Mean Time Between Failures values means a very high maintenance work load with short intervals between successive component failures. In general, the more complex the system, the lower the Mean Time Between Failures. The time interval can be increased through the use of redundant components and "self-repair" capabilities.
Adding these capabilities increases the system complexity and therefore will reduce the Mean Time Between Failures, yet the risk is substantially lower because the system is able to stay up and running even with failed components.
