Please explain the differences between an active-on-arrow (AOA) network and an activity-on-node (AON) network. Which is primarily used in this chapter?

this is the reading from Chapter 3: "Network Diagrams and Approaches The first step in a PERT or CPM network is to divide the entire project into significant activities in accordance with the work breakdown structure. There are two approaches for drawing a project network: activity on node (AON) and activity on arrow (AOA) . Under the AON convention, nodes designate activities. Under AOA, arrows represent activities. Activities consume time and resources. The basic difference between AON and AOA is that the nodes in an AON diagram represent activities. In an AOA network, the nodes represent the starting and finishing times of an activity and are also called events . So nodes in AOA consume neither time nor resources. Although both AON and AOA are popular in practice, many of the project management software packages, including Microsoft Project, use AON networks. For this reason, although we illustrate both types of networks in the next examples, we focus on AON networks in subsequent discussions in this chapter"(chapter 3).

-Explain what AOA and AON means/ Their definition

- What is their purpose

- What is their difference

-The chapter primarily focuses on AON networks

- use additional article for more information