thank you so much guys it was helpfulThe simple way to think of it is if you have two tasks that you are doing at the same time but one is shorter, the shorter task will have free float. That is you will be done with that task earlier than the other. This assumes that both need to be complete to start the next task.
For example you are sanding floors and window sills at the same time, but both need to be completed prior to painting. If the floors take 5 days and the window sills take 2 days, the window sill task has 3 days of free float.
You could also think of Free Float activity as the amount of time that the finish of an activity can be delayed without delaying the earliest starting time for the following activity. or FF = ES - EFFF - Free float for this activity
ES - Early start of following activity
EF - Early finish of this activity
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