Based on our practice, we propose two systems, MIS twd and DSS twa, get two graphic tools to represent system structure and decisionactivity structure and suggest some thinking and methods to completesystem analysis for the two systems.

• 提出了一些构想和方法，完成对两类系统的系统分析； 并给出两个图的工具，用来描述系统结构和决策事项结构