失效间工作时间operatingtimebetweenfailures
恢复前时间timetorestoration;timetorecovery
使用寿命usefullife
早期失效期earlyfailureperiod
恒定失效密度期constantfailureintensityperiod
恒定失效率期constantfailurerateperiod
耗损失效期wear-outfailureperiod
瞬时可用度instantaneousavailability
瞬时不可用度instantaneousunavailability
平均可用度meanavailability
平均不可用度meanunavailability
渐近可用度asymptoticavailability
稳态可用度steady-stateavailability
渐近不可用度asymptoticunavailability
稳态不可用度steady-stateunavailability
渐近平均可用度asymptoticmeanavailability
渐近平均不可用度asymptoticmeanunavailability
平均可用时间meanuptime
平均累积不可用时间meanaccumulateddowntime