You have been assigned to manage a new project for your company. The activity on node (AON) diagram…

➤ How do I calculate the slack for an activity such as H or F?
Compute slack as LF − EF or LS − ES after performing forward and backward passes. Use ES/EF from the forward pass and LS/LF from the backward pass. A positive slack means the activity can be delayed without affecting the end date; zero slack means the activity lies on the critical path.