Since the 120-millimeter self-propelled mortar will be powered by tank battalions to improve the combat power of mechanized units, the information about the munition's effect is needed to know how many munitions are required. Because of the limit of test on ammunition effectiveness in the actual environment, this study is executed by using analysis model named FEAM that can best describe the actual battlefield environment operating the self-propelled mortar. And the number of experimental factors and levels such as shooting method, target type, and topographical condition is very large in combat experiment, and a constant amount of experiments repeated in one scenario is required due to according to probabilistic characteristics of analysis model. Therefore, statistical technique and simulated method are applied on this study to reduce the number of experiments and difficult to execute in the real world.