关键词: 目标威胁评估, 灰关联分析, 改进, 决策

Abstract: Targets threat evaluation is the most important component in command and decision-making，and it is the base to make scheme of weapon source arrangement effectively.The method of Gray Relation Analysis（GRA） has been widely used in evaluation and decision-making，but it has limitation also.Against the limitation of GRA，a new method based on refinement to GRA is presented，which is RGRA.The evaluation model of targets threat extent is build，and the application example and performance analysis is given in this paper.The result shows that RGRA is an effective and practical way to the targets threat extent evaluation，and the system performance is improved by 10%.RGRA takes predilection of decision-maker and the difference of data between shape and values in account synthetically.The evaluation model has precise theory and specific significance，and is more practical than traditional GRA.

Key words: target threat evaluation, Gray Relation Analysis, refinement, decision-making