第3级开始定义在第2级的实体中可能进行的典型业务活动，如发出客户订单、信用卡授权以及跟踪订单处理等。
Level 3 begins to define the typical business activities that may be conducted within the level 2 entities, such as issuing customer orders, authorizing credit, and tracking order handling.
现在，一个钣金工厂要交叉排产大量的小批量订单，处理最后一刻的订单修改指令，甚至是订单取消等事宜。
A shop may have to juggle numerous small orders and revisions and deal with last-minute changes or even cancellations.
订单处理成本包括选择供应商、订单接收、订单准备等成本。
The order-processing costs include supplier selection, receiving, order paperwork preparation and so on.
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