Abstract
Both AON (Activity-On-Node) and AOA (Activity-On-Arrow) network diagrams are universally used network planning formats, but they have different characteristics and representations, which has caused inconvenience for engineering technicians to learn and use network planning technique. This paper analyzes and compares the principles, drawing methods and application in practical engineering of the two network diagrams, and also points out their advantages and disadvantages respectively. We believe that with the popularization of the application of computer technology and the development of new network planning technique, the advantages of AON will become more obvious and should be the first choice in teaching and engineering practices.
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