What are the definitions and differences between slack and float in project management?

Question

Accepted Answer

Slack and float are terms used in project management to refer to the amount of time a task can be delayed without affecting the project timeline.

Slack is the amount of time an activity can be delayed without delaying the project completion date.
Float is the amount of time an activity can be delayed without delaying the early start date of the next activity.
Slack is specific to a particular task, while float is associated with the entire project network.
Slack is calculated by subtracting the duration of the task from the difference between the late start and early start dates.
Float is calculated by subtracting the early start date of the next activity from the late finish date of the current activity.

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