Sample Allocation Method for Maintainability Test Based on Extended FMECA Information

To ensure the accuracy of military equipment maintainability verification results, a sample allocation method for maintainability test based on extended failure mode, effects and criticality analysis (FMECA) information is proposed to address the problem that the influence factors are relatively one-sided and the weighting is subjective in the current test sample allocation method. The influence factors are analyzed and determined from three aspects: the fault occurrence characteristics, fault impact, and test economy. A method for calculating the fault propagation intensity based on the improved LeaderRank is proposed, which is introduced into the FMECA for expansion. It is proposed to use the CRITIC method to determine the objective weights of the influence factors, determine the subjective weights based on the relative importance of the influence factors, introduce game equilibrium to weigh and determine the combination weights, and then complete the sample allocation. Finally, an example showed that the influence factors determined by this method are more comprehensive, the weight results are more scientific, and the sample structure is more reasonable.