TF & FF

Total float (TF) is the total float an activity can slip before it impacts the completion of the project (or the last activity in it’s logic path). Free float (FF) is the float an activity can slip before it impacts on another activity in the logic path (before it steels float from another activity). This cannot be edited and is calculated when you schedule the project.

From Primavera:

Free Float: The amount of time activity can be delayed before delaying the start date of any successor activity.

Total Float: The amount of time activity can be delayed before delaying the project finish date. Total float can be computed as Late Start - Early Start or as Late Finish - Early finish. This option can be set when runing the project scheduler.

Regards.

Marcio Eduardo.

Free Float: It is the duration that early start of an activity can be delayed without delaying the early start of successor activity.

Total Float: It is the duration that start or finish of an activity can be delayed without affecting the project finish date. The Total Float can be calculated as Late Start- Early Start or Late Finish- Early Finish.



Vinai