A typical use case for adding additional archiving information is the association of a customer and order number with every E-mail that is part of customer communication.

添加附加存档信息的一个典型用例是将客户和订单号与作为客户通信一部分的每一封e - mail关联起来。

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Imagine the ZIP code was instead a customer ID number in an order-tracking application.

假设ZIP代码被替换成了订单跟踪应用程序中的客户ID号码。

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Later, if the customer orders something, the rest of the process might need to be correlated on the order number.

以后，如果客户订购了商品，则流程的其余部分可能需要与订单号相关联。

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When the order number appears on a screen, the customer picks up his food at the other end of the counter.

WSJ: McDonald's Tackles Repair of 'Broken' Service

Under a new "dual point" ordering system that is being rolled out nationwide, the customer places an order at one end of the counter and is given a receipt with a number.

WSJ: McDonald's Tackles Repair of 'Broken' Service