Before revision: = ν (nu) Acceleration Factor from the Arrhenius equation = Boltzmann's Constant ( ) = 8.617 x 10e-5 eV/°K Device Hours = D x H Equivalent Device Hours (EDH) = D x H x Failure Rate per hour = Failures in Time = Failure Rate per billion hours = FIT = Mean Time to Failure = MTTF Where the Acceleration Factor from the Arrhenius equation is: Failure Rate per hour = Failures in Time = Failure Rate per billion hours = FIT = Mean Time to Failure in hours = Mean Time to Failure in years= ´ In case you want to calculate the acceleration factor including the Humidity the so called Highly accelerated stress test (HAST), then: the Acceleration Factor from the Arrhenius equation would be: where is the stress test relative humidity (in porcentage).
After revision: (DH)= ν (nu) Acceleration Factor from the Arrhenius equation = Boltzmann's Constant ( ) = 8.617 x 10e-5 eV/°K Device Hours = D x H Equivalent Device Hours (EDH) = D x H x Failure Rate per hour = Failures in Time = Failure Rate per billion hours = FIT = Mean Time to Failure = MTTF Where the Acceleration Factor from the Arrhenius equation is: Failure Rate per hour = Failures in Time = Failure Rate per billion hours = FIT = Mean Time to Failure in hours = Mean Time to Failure in years= ´ In case you want to calculate the acceleration factor including the Humidity the so called Highly accelerated stress test (HAST), then: the Acceleration Factor from the Arrhenius equation would be: where is the stress test relative humidity (in porcentage).