从该阶段开发正式进入软件的实际开发阶段，本阶段完成系统的大致设计并明确系统的数据结构与软件结构。在软件设计阶段主要是把一个软件需求转化为软件表示的过程，这种表示只是描绘出软件的总的概貌。本概要设计说明书的目的就是进一步细化软件设计阶段得出的软件总体概貌，把它加工成在程序细节上非常接近于源程序的软件表示。-From the stage of development of formal entry into the actual software development phase, this phase is completed the general design of the system and identify system' s data structure and software architecture. In the software design phase, mainly due to a software requirements into the software that process, such that only depicts the general overview of the software. The purpose of this summary of the design specification is to further refine the software design phase of software derived from the general overview, it processed into the procedural details of the software source code very close to that.