1. 选择一个规模小的软件系统，要求该系统有明确的功能需求。

2. 对系统进行需求分析，并写出需求分析说明书。

3. 根据需求分析，进行系统总体设计，并绘制出总体系统结构图。

4. 根据总体设计，进行详细设计，并绘制出详细系统功能图，并建立数据字典。

5．根据详细设计，描述部份功能的流程图。

-1. Select a small-scale software system, require that the system has a clear functional requirements. 2. For the system needs analysis, and write a requirements analysis specification. 3. According to requirements analysis, system overall design, and draw out the overall system diagram. 4. According to the overall design, detailed design and preparation of detailed system function and the establishment of a data dictionary. 5. According to the detailed design, describes some of the functional flow chart.