The mission availability of equipment defined based on mission success and its application in key spare parts calculation of warship

Mission availability of equipment of equipment is defined as the operation availability in the mission period. Considering the mission success of the warship, the mission profiles of the warship equipment are differentiated as two cases such as mission success and mission failure, and an equation described mission availability of equipment of equipment, in which the mission availability of equipment is associated with the probability of mission success, is given. Based on the definition of mission availability of equipment of equipment, the relationship between mission availability of equipment and the quantity of spare parts affiliated with the mission is shown in the case that the life of key spare parts is due to exponential distribution and replacing strategy is used, then a new analytic spare parts calculation model is proposed. Finally, the calculation results based on the analytic model are compared with the simulation results in an instance, and the correctness and validity of the analytic spare parts calculation model are proved.