August 2021
Intermediate to advanced
450 pages
4h 46m
Chinese
Content preview from 面向对象的思考过程（原书第5版）Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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6.1.3 收集需求
需求文档描述了用户期望的系统。尽管需求文档的详细级别不需要具备高度的技术细节，但需求必须是详尽的，能充分代表用户对最终产品所需的本质。需求文档必须为用户对系统的完整性做出明智判断提供足够的细节。它也必须为设计团队使用该文档在设计阶段进行设计时提供具体细节。
而SOW是由段落的形式（甚至是叙述形式）编写的文档，需求通常被表示为汇总表或者分项条目。每个单独的条目代表了该系统一个特定的需求。需求是从工作陈述文档中蒸馏出来的。本章稍后会展示该过程。
在很多方面，需求是系统最重要的部分。SOW可能会包含不相干的材料，然而需求是系统必须要实现的最终表现。今后软件开发过程中的所有文档都要基于需求。
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