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Project Management & Agile · Intermediate

Free Float

The amount of time an activity can be delayed without delaying the early start of any successor.

Definition

Free float = ES of earliest successor - EF of the activity (adjusted for convention). It is always less than or equal to total float.

Example

Activity C finishes day 8; its successor's ES is day 10, so free float is 2.

Exam tip

Free float protects successors; total float protects the project end date.

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