Definition The average time a system runs before it fails.
Also called MTBF, Mean time between failures
Example 1,000 hours of operation with 4 failures gives an MTBF of 250 hours.
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Why it matters It shows how reliable systems and equipment are.
Where it is used Equipment reliability reports and IT operations.
How to calculate it Total operating time in hours ÷ number of failures
Worked example 1,000 hours of operation with 4 failures gives an MTBF of 250 hours.
