Besides documenting an organization's current affairs, a business-level sequence diagram can be used as a requirements document to communicate requirements for a future system implementation.
除记录组织的当前事件外，一个业务级的序列图能被当作一个需求文件使用，为实现一个未来系统传递需求。
The business Analyst begins to document requirements, using business process models to describe functional requirements of the system as well.
业务分析人员开始编制需求，还利用业务过程模型来描述系统的功能需求。
One of the activities during this phase is to identify and document the nonfunctional system requirements.
在此阶段的活动之一是标识和记录非功能系统需求。
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