Aiming at the instability of calculation precision resulting from the selection of each target weight in evaluating weapon systems by means of the method for weighted sum

the proposal for improvement was put forward.Namely

the subjective weights depending on experts' experience are substituted for the optimal weights.The optimal weights were acquired through constructing the mathematical programming model based on subjective weights and objective weights.The method of solving subjective weights was the same as original

the objective weights were solved by means of grey theory.The case and analysis show that the method of improved weighted sum can improve the evaluation precision up to more than 5%

and minimize the instability of calculation precision resulting from only using subjective weights.The idea that the optimal weights substituted the subjective weights

was brought forward in improving evaluation precision for the first time.The ideas of the optimal weights

its solving method

and its improvement

were depicted

and were analyzed.