The objective is to dynamically select the class of customer to be next served at the first stage, based on the state of the system, so as to maximize the average benefit over an infinite horizon.

• 系统的控制目标是根据系统的状态动态地选择在第一阶中下一个被服务的顾客的种类 ；以保证系统在一个无限长的时间里平均收益最大 .；这个控制模型可以应用在生产和通讯网络中