As different roles are responsible for requirements engineering and development, the requirement specification often resides in different tools than the development artifacts.
因为对于需求工程和开发，需要有各种不同的角色来负责，所以需求说明书经常会以多种不同的工具创建，种类要比开发工具还多。
In the field of software engineering, the requirement management tools and the testing management tools have been used extensively.
需求管理工具和测试管理工具在软件工程领域中得到越来越广泛的应用。
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