How is total float for a project task calculated?

Total float, also known as slack, represents the amount of time that a project task can be delayed without causing a delay to the project completion date. The calculation of total float is centered on the differences between the early and late start times.

To calculate total float, you determine the late start time and early start time for a specific task. By subtracting the early start time from the late start time, you capture the flexibility that exists for that particular task, which directly translates to the total float available. This difference highlights how much a task can shift without impacting the overall project schedule.

Using this method enables project managers to better understand scheduling dynamics, assess risks, and make informed decisions when managing project timelines.