Software understanding is always the bottleneck of the software maintenance process, it cost software workers quantities of time.

软件理解一直是软件维护阶段的瓶颈问题，它需要花费维护人员大量的时间和精力。

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This paper describes the analysis, demand analysis, the outline design, detail design, system implementation and system maintenance, software development process.

本文详细阐述了系统分析、需求分析、概要设计、详细设计、系统实现以及系统维护等软件开发过程。

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For developing a software product, the development process is divided into5stages:Requirements Analysis &Specification, Design, Coding, Testing, and Maintenance.

就开发软件而言，开发过程分成5步：需求分析及详细计划书，设计，编程，测试和维护。

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