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Negative Float

 

What do negative float entries mean?

Negative total float is defined as the amount of time that must be saved in order to bring the project up to speed so that it is not delayed by the activity that has that negative float. Negative relationship free float refers to the number of days that an activity will delay its successor activity.

In scheduling software (incl. Oracle Primavera P6) negative free float - and consequently negative total float - is triggered by either of the two:

  1. The finish date of the latest ending activity is later than the Must-Finish-By Date of the project set by the user.
  2. A constraint has been introduced, which has overruled the pre-defined relationships among activities.
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