Analytic Hierarchy Process(AHP) is widely used in multi-criteria decision making situation.The synthetic performance of six automatic mechanisms is evaluated based on a modified AHP method.The performance of automatic mechanisms is described as objective level

criteria level and project level

and the automatic mechanism's mass

caliber of guns

mass of projectiles

initial velocity and firing rate of projectiles are treated as evaluating criteria.The judgment matrixes are given

and then the optimal project can be obtained by modified AHP.The evaluating result is the same as that of the traditional AHP method.The merits of the modified AHP are skipping the step of judgment matrixes consistency checkout and reducing workload.