称顾客为等待所费时间与服务时间之比为顾客损失率,用R表示,

<img src='https://img2.soutiyun.com/ask/2020-09-22/969632785399133.png' /> <img src='https://img2.soutiyun.com/ask/2020-09-22/969632796559772.png' />

时间:2024-04-18 15:40:48

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