A mortar is commonly used as an indirect fires weapon to support close fires with a variety of ammunition. There are mortar weapons with various shell. Each type of shells fired in mortars does damage to a weapon when the total damage on a mortar weapon reaches the tolerance limit, the mortar weapon either fails or explodes, leading to a compulsory replacement which is costly. In order to maintain the mortar weapons and archers in wars, a research was conducted to find the best number of mortar shells that will be fired until a preventive replacement for mortar weapons is implemented

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