jimmy_fan 发表于 2008-8-21 12:32:27

Reliability and MTBF Overview

介绍MTBF的英文教材,请大家参考!~

kingdodoo 发表于 2008-10-10 14:24:13

thankyouverymuch

gavin.fung 发表于 2008-10-11 08:17:21

Thanksforyourshare.

zhanghjspace 发表于 2008-10-21 12:02:04

多谢了，多谢分享！:handshake

william1979 发表于 2008-10-22 08:49:38

感謝分享~下載來學習一下!!!

holly123456 发表于 2008-10-22 10:07:41

谢谢LZ的分享!

laputadancer 发表于 2008-10-22 15:54:10

谢了，新手学习下。

chenzhengiaven 发表于 2008-10-25 18:14:01

新手学习中

yeh 发表于 2008-10-26 11:03:18

MeanTimeBetweenFailures(MTBF)
ReliabilityisquantifiedasMTBF(MeanTimeBetweenFailures)forrepairableproduct
andMTTF(MeanTimeToFailure)fornon-repairableproduct.Acorrectunderstanding
ofMTBFisimportant.ApowersupplywithanMTBFof40,000hoursdoesnotmean
thatthepowersupplyshouldlastforanaverageof40,000hours.Accordingtothetheory
behindthestatisticsofconfidenceintervals,thestatisticalaveragebecomesthetrue
averageasthenumberofsamplesincrease.AnMTBFof40,000hours,or1yearfor1
module,becomes40,000/2fortwomodulesand40,000/4forfourmodules.Sometimes
failureratesaremeasuredinpercentfailedpermillionhoursofoperationinsteadof
MTBF.TheFITisequivalenttoonefailureperbilliondevicehours,whichisequivalent
toaMTBFof1,000,000,000hours.TheformulaforcalculatingtheMTBFis
Sita=T/R.
Sita=MTBF
T=totaltime
R=numberoffailures

woodsean 发表于 2008-10-26 20:40:31

学习一下下
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