What Is Total Float?

Total float is the total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or intermediary milestone.

What Is Total Float?

Total float is the amount of time an activity can be delayed without delaying the project. Total float is often known as slack.

Activities have three types of float:

Free float is the amount of time an activity can be delayed without delaying the early start of any successor activity. Project float is the amount of time an activity can be delayed without delaying the project finish date.

Interfering float is the amount of time an activity can be delayed without delaying the late start of any successor activity. Total float is the sum of free float and interfering float.

Total float is the amount of time an activity can be delayed without delaying the project. Projects often have critical activities. A critical activity is an activity whose delay will delay the project.

The critical path is the sequence of critical activities. A float of zero means the activity is on the critical path and any delay will delay the project.

A positive float indicates the activity is not on the critical path and can be delayed without delaying the project. Total float is often confused with free float.

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

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