各因素的最优化水平得以确定。
不过这样做的问题就是，航空公司会定一个利润最优化的最低价格，而这个价格很有可能会超过使飞机拥挤程度减小到理想水平所必须的价格。
The problem is that the airlines would fix a profit-maximizing minimum price, and it probably would exceed the price necessary to reduce congestion to the optimal level.
应用谈判技能和供应商进行价格谈判，达到成本最优化，并同时提高物流和质量水平。
By using advanced negotiation skill to get optimal price, at the same time get better delivery and quality.
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