Analysis of Reliability Data Using Subsurvival Functions and Censoring Models

The problem of failure rate estimation is considered in the light of data acquired from the ATV reporting system. A number of different models for preventive maintenance are discussed which make the failure rate identifiable, as are more general bounding methods which do not require identifiability. These techniques are illustrated on ATV data which is shown in graphs of subsurvival functions. These graphs show, amongst other things, the effect of different maintenance policies on identical systems.