提出了一种简化的确定关键路径方法，该方法可分别运用于单代号和双代号网络图中。
This paper put forward a simplified method that can be used on activity on node network and activity on line network to identify the critical path of schedule.
本文介绍了网络计划技术的概念，阐述了双代号网络计划图和单代号网络计划图的特点。
In this paper, the concepts of network planning techniques is introduced at the beginning. The characteristics of dual code and single code network drawing is expounded.
设计并开发了单代号网络图自动绘制系统，生成的网络图逻辑关系清楚、布局合理、直观清晰。
The software automatic plotting activityonnode network is developed, and the diagram plotted by it has clear logical relations, rational layout and simple appearance.
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