antud kestusega ajavahemikus, mille algus on määratud parandatud objekti/seadme kindla vanusega, kahe erineva pingetingimuse komplekti korral saadud rikete arvu suhe
in a time interval of given duration, whose beginning is specified by a fixed age of a repaired item, ratio of the number of failures obtained under two different sets of stress conditions
Failure intensity acceleration factor show how time-to-fail at a particular operating stress obtain a sufficient number of failures to fit life distribution models.
