一、完全不确定型决策的决策准则（一）“小中取大”准则。“小中取大”准则是A·瓦尔德所提出，故亦称瓦尔德准则。其方法是：首先找出各方案的最小收益值，然后取这些最小收益值中最大的方案作为最优方案。以表一所示决策矩阵为例。首先把各方案的最小收益值列于表一最小收益 First, the decision-making criteria of completely uncertain type of decision-making (a) “small plus large” criteria. The criterion of “small and medium take big” is proposed by A. Wald, so it is also called Wald’s criterion. The method is: First, find the minimum return value of each program, and then take the largest of these minimum return value as the optimal solution. Take the decision matrix shown in Table 1 as an example. First of all, the minimum return of each program is listed in Table 1, the smallest gain