A case study on the sufficiency of the result given by PoF method

An avionic illumination power supply unit and its modified type are selected as the case study in this paper to discuss the data sufficiency of the result given by Physics of Failure method. Comparing the using information obtained from field operation with the failure data, which is predicted under the help of physics of failure method, the sufficient level of the failure data can be evaluated in this paper. The indicator of the sufficiency of the failure predicting result is Failure Coverage Rate. With this indicator, the reliability engineers can estimate weather their knowledge about failure mechanisms is enough to estimate the reliability of the electronic products or not.