Transcription of A Reliability Calculations and Statistics - Springer
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A Reliability Calculations and Statistics - Springer
AReliability Calculations and StatisticsIn this appendix we will discuss basic probabilistic and statistical coher-ences and quantities. Our goal is to learn how to use them in real life. Thetargets of our discussion are hardware components and hardware config-urations. Software shows failures of different kinds which do not apply tothe findings in this might say that Statistics is about large numbers (of outages) itdoes not apply to predicting failures which happen very seldom. Even ifthis is true, we can use Statistics and probabilities to predict reliabilitywhen we configure a system. It also helps to identify anomalies duringsystem operations. In particular we will address the following areas: In configuring a new system, there are many options. In theory, yourvendor of choice should offer thebestconfiguration for your needs; inpractice many of your hardware vendor s presales consultants fail todo this.
362 A Reliability Calculations and Statistics Table A.1. Confidence levels γ and corresponding values of c γ (%) c 80 1.28 90 1.65 95 1.96 98 2.33 99 2.58 which contains the real probability p with a chosen confidence level γ.If we set γ very close to 1, this interval becomes very large. It depends on
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