Correct Answer - Option 1 : Slack
Concept:
Slack: It is the amount of time by which a particular event can be delayed without delaying the project completion time. Or It is an additional time available for the performance of an activity in PERT and CPM calculated on the basis that all activities will start at their earliest start time.
Total float: It is the amount of time that the completion time of an activity can be delayed without affecting project completion time.
Free float: It is the amount of time that the activity completion time can be delayed without affecting the earliest start time of the immediate successor activities in the network.
Interfering Float: Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. It is given by Total float - Free float.
Independent Float: Amount by which an activity can be delayed without delaying the project; even if all predecessors are at Late Finish and all Successors are at Early Start.
