Mean time between failures

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Mean time between failures (also known by its acronym, MTBF) is the overall average time between product breakdowns. Usually expressed in terms of operating hours.

Definitions

According to Managing Quality by Foster (6th edition),

Mean time between failures (MTBF). The overall average time between product breakdowns. Usually expressed in terms of operating hours.

According to Juran's Quality Handbook by Defeo (7th edition),

Mean time between failures (MTBF). The mean (or average) time between successive failures of a product.

According to the ITIL Foundation 4e by Axelos,

Mean time between failures (MTBF). A metric of how frequently a service or other configuration item fails.
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