通常，软件生存周期包括可行性分析与开发项计划、需求分析、设计（概要设计和详细设计）、编码、测试、维护等活动，可以将这些活动以适当的方式分配到不同的阶段去完成。-Typically, the software life cycle including feasibility analysis and development projects, requirements analysis, design (outline design and detailed design), coding, testing, maintenance and other activities, these activities can be assigned to an appropriate manner different stages to complete.