MTBF SECRETSMTBF
THINGS TO REMEMBER!MEAN TIME BEFORE FAILURE is the sum of MTTF (mean time to failure) and MTTR (mean time to repair).
ANOTHER WAY OF STATING THIS IS:
IT IS EQUAL TO THE SUM(downtime minus uptime) / number of failures
MTTF implies the reciprocal of the failure rate:
MTTF is often denoted by the symbol theta
MTTF can be defined in terms of the failure density function.
MTTF = Integral (from zero to infinity) tf(t)dt
Failure rate of Components must be known!
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Failure rate and MTTF are simply reciprocals.
