A key design decision is the grain of aggregate tables.
一个关键设计决策是汇总表的粒度。
It is rather difficult to aggregate individual preference into group's when we are making group decision with multiple objectives.
由于决策者的个人偏好效用难于进行比较和归并，使得多目标群决策问题成为难题。
Yet for the most part models of aggregate phenomena in management science and economics are not consistent with such micro-empirical knowledge of individual decision-making.
然而，大部分车型的聚集现象在管理科学和经济学是不相符的个人决策与的这种微型经验知识。
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