这样可以确保存在一条用于说明设计如何处理相关需求的记录，还允许进行更改影响分析。
This ensures that there is a record of how the design addresses requirements and also allows for change impact analysis.
规格说明 —— 捕捉详细的需求和高层设计
Specification When the detailed requirements and high-level design are captured
在1985年，需求说明书是作为设计基础的分析的一部分。
In 1985, requirements specification was part of analysis, which was the basis for design.
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