1. CPA – Information Sheet

3. Activities
Activities are the separate parts of a project, that require time and resources.
The arrows which represent the activities are frequently given letters, so that each activity can be easily identified. The duration of each activity is written below the arrow.
The arrows show the sequence of the activities necessary to complete the project

4. Nodes Nodes are the start or end of each activity.
Each node is numbered in the left-hand segment; the top right-hand segment gives the earliest start time (EST); the lower right-hand segment gives the latest finish time (LFT).
The EST is the first time at which an activity can be started.
The LFT states the time by which the activity must be finished if the entire project is to be completed on schedule and not to be delayed.