Abstract: There is provided a method of selecting a maintenance operation to be performed on a device. An exemplary method comprises determining a health parameter for the device, the health parameter being predictive of a probability of failure of the device based on archival data about a plurality of devices similar to the device. The exemplary method also comprises performing a first maintenance operation on the device if the health parameter indicates that the probability of failure of the device is below a threshold. The exemplary method additionally comprises performing a second maintenance operation on the device if the health parameter indicates that the probability of failure of the device exceeds the threshold.

Abstract: A method for reliability estimation of repairable systems comprising receiving a plurality of discrete time intervals including a current time interval and at least one previous time interval, and associated reliability data. A failure rate of original parts in the repairable system at the end of the current time interval is computed in response to original part reliability during the current time interval and the number of original parts in the repairable system at the beginning of the current time interval. A failure rate of replacement parts in the repairable system at the end of the current time interval is computed in response to replacement part reliability during each of the previous time intervals and the number of replacement parts in the repairable system at the beginning of each of the previous time intervals.