Abstract: Common cause failure exists in the performing process of military equipment mission. The reasonable modeling of the common cause failure events is of great significance to the accurate assessment of mission success probability. A kind of random common cause failure has not been considered in the existing mission success probability assessment models for phased-mission system. The implicit BDD (binary decision diagrams) method is used to model the phased-mission success probability when the occurrence of the random common cause failure event follows a certain distribution. A real example is used to verify the validity of the proposed model. The results show that the proposed model can be used to assess the phased-mission success probability considering random common cause failure, and the reasonable modeling mission profile contributes to the accurate evaluation of mission success probability. Key

Key words: systemassessmentandfeasibility, phased-mission, successprobability, randomcommoncausefailure, binarydecisiondiagram