这次实验主要是确定对开发软件的综合要求，在可行性计划的基础上更进一步地描述软件的功能和性能，确定软件设计因素和其他系统元素的接口细节，建立当前系统的逻辑模型，以表明这个软件开发的内容和目的。(This experiment is to determine the comprehensive requirements for software development, further describes the function and performance of the software based on the feasibility of the plan, determine the interface details of software design factors and other system elements, constructs the logic model of the current system to show the content and purpose of software development.)