By Monte Carlo,the equivalence between GJB376 method and variablesattributes assessment method was studied. According to reliability assessment rule,it is required that the maximum error of receptance between two methods is less than 1%. Twenty kinds of qualified and unqualified products assumed artificially were assessed with variablesattributes method and rundown method respectively. The conclusions from two methods are consistent. Results show that variablesattributes assessment method is equivalent to GJB376 method and the variablesattributes method is feasible for assessing high reliability of initiating explosive devices with small samples.