What is Total Float (TF) and Free Float(FF)?

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Total Float is the amount of time an activity can be delayed without delaying the project completion date, while Free Float is the amount of time an activity can be delayed without delaying the early start of its successor activity.

Total Float is calculated by subtracting Early Start (ES) from Late Start (LS) or Early Finish (EF) from Late Finish (LF).
Free Float is calculated by subtracting Early Start (ES) of the successor activity from Early Finish (EF) of the current activity.
Total Float helps in identifying the flexibility in the project schedule, while Free Float helps in identifying the flexibility in the specific activity sequencing.
For example, if an activity has a Total Float of 5 days, it can be delayed by up to 5 days without affecting the project completion date.

What is Total Float (TF) and Free Float(FF)?

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