1) In activity-on-arrow networks, the graphic presentation of an activity. The tail of the arrow represents the start of the activity. The head of the arrow represents the finish. Unless a time scale is used, the length of the arrow stem has no relation to the duration of the activity. Length and direction of the arrow are usually a matter of convenience and clarity. 2) In activity-on-node networks, an arrow represents a precedence requirement.
阅读全文
收起全文
