一个预定服务可能需要有权安排信息，而一个发货服务可能需要调用上述的预定服务来安排一个特定的发送给客户的存货条目。
A reservation service may need access to scheduling information, while a shipping service may need to call said reservation service to arrange for a particular inventory item to be sent to a customer.
如果订单得到审核人员批准，将被发送给发货部门；否则，订单将被取消，并会向客户发送通知。
If the order is approved by the person, then it is sent for shipment; otherwise, the order is cancelled and a notification is sent to the customer.
最后，假设买方的银行帐户状态良好，供应商就向仓库发送一个按订单发货的请求。
Finally, assuming that the bank account status is good, the supplier sends a request to the warehouse to ship the order.
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