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When determining how reliable something is, a benchmark called "Mean Time Between Failures" is often used. It's usually represented as "MTBF". That means, the average time that a component will operate continuously.
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MTBF = 1/failure rate R(t) = e (-t/MTBF) http://www.vicorpower.com/documents/quality/Rel_MTBF.pdf
Reliability is not measured. Reliability is an estimation, typically probablistic.
Everyone defines a failure differently. Who you define as a failure will depend on what you define failure as. What one person sees as a failure, someone else may not see it the same way.
why readabilities only for hardware not software
A bathtub curve is a curve used in reliability engineering, describing a particular form of the hazard function taking into account three categories of failure rate.
What is the failure rate for a franchise? D. 5%
Richard E. Barlow has written: 'Statistical theory of reliability and life testing: probability models' -- subject(s): Statistical methods, Reliability (Engineering), Accelerated life testing 'Reliability growth during a development testing program' -- subject(s): Reliability (Engineering) 'Tolerance and confidence limits for classes of distributions based on failure rate' -- subject(s): Reliability (Engineering) 'Reliability and Fault Tree Analysis'
Although both system support high definition output via HDMI and many games are ported to both systems the Xbox 360's failure rate is significantly higher than the Playstation 3 consoles. The Xbox 360 in a recent study had a hardware failure rate of 54.2 % compared to the Playstation 3 consoles 10.6 % failure rate.
since a2+ b2= c2, , and , then the failure rate IS in fact 123,456,789,123,345,634,345%
standardization
The rate of discount set by a central bank