Float

Float, also called slack, is the amount of time an activity can be delayed without affecting any subsequent activities. There are two types of floats available:

• Free Float: It is the amount of time a schedule activity can be delayed without delaying the early start date of any immediately following schedule activities.
• Total Float: It 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 violating schedule constraint.

Float is calculated by using the critical path method technique.