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For example, a common specification for PATA and SATA drives may be an MTBF of 300,000 hours, giving an approximate theoretical 2.92% annualized failure rate i.e. a 2.92% chance that a given drive will fail during a year of use. The AFR for a drive is derived from time-to-fail data from a reliability-demonstration test (RDT). [3]
Failure rate is the frequency with which any system or ... and governs the frequency of required system maintenance and ... Annualized failure rate; Burn-in;
Annualized failure rate – Probability that a device or component will fail during a year of use; Failure rate – Frequency with which an engineered system or component fails; Frames per stop – Term of reliability in the bowling industry; Mean time to first failure – Average service life for non-repairable components
However, in the context of a maintenance contract, it would be important to distinguish whether MTTR is meant to be a measure of the mean time between the point at which the failure is first discovered until the point at which the equipment returns to operation (usually termed "mean time to recovery"), or only a measure of the elapsed time ...
[17] Hard drives with S.M.A.R.T.-reported average temperatures below 27 °C (81 °F) had higher failure rates than hard drives with the highest reported average temperature of 50 °C (122 °F), failure rates at least twice as high as the optimum S.M.A.R.T.-reported temperature range of 36 °C (97 °F) to 47 °C (117 °F). [16]
PMS works is periodic maintenance, like when you perform diagnostic tests on your car every 90 days (or 3,000 miles). A failure may occur any time during the 90 days, such as a broken light, but you will not become aware until you perform diagnostic test. Mean Time To Discover is statistical when PMS is the dominant maintenance philosophy.
The first piece of information added in an FMEDA is the quantitative failure data (failure rates and the distribution of failure modes) for all components being analyzed. The second piece of information added to an FMEDA is the probability of the system or subsystem to detect internal failures via automatic on-line diagnostics.
Failure analysis; Failure modes, effects, and diagnostic analysis; Failure of electronic components; Failure rate; Failure reporting, analysis, and corrective action system; Flixborough disaster; Forensic engineering