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What is the 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, called?

What is the 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, called? Correct Answer 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.

Additional Information

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. 

Related Questions

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2. In CPM, two time and cost estimates are made for each activity, which are called the optimistic and pessimistic estimates.
3. Time is the only variable used in PERT.
4. While in PERT the emphasise is on event, in CPM the emphasise is on activity.
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