Airline yield management improved because analytical techniques uncovered the best predictor that a passenger would actually catch a flight he had booked: that he had ordered a vegetarian meal.
航线产出管理也因为分析技术而有所进步，这种技术发现旅客因为点了机上的素食而肯定会赶上飞机。
2
Static efficient sustained yield — the sustained catch level in a fishery that produces the largest annual recurring net benefit.