What is the difference between Total Float and Free Float in Primavera P6

In Primavera P6, there are two important values: Total Float and Free Float.

So what are the differences between them?

  • Total Float: is the amount of time an activity can be delayed without delaying the Project Finish Date.
  • Free Float: is the amount of time an activity can be delayed without delaying its Successor Activity Finish Date.

Let’s look at the following example:

What is the difference between Total Float and Free Float in Primavera P6-2
  • The Total Float value of Activity A, B, C, D, E, I is 0 day. Meaning that if they were delayed, the Project Finish Date would have been delayed.
  • The Total Float value of Activity F, G, H is 5 days. Meaning that they could be delayed of 5 days without making the Project Finish Date delayed.
  • The Free Float value of Activity A is 0 day. Meaning that if it were delayed, the Successor Activity Finish Date (Activity B, F) would have been delayed.
  • The Free Float value of Activity H is 5 days. Meaning that it could be delayed of 5 days without making the Successor Activity Finish Date (Activity I) delayed.

There are a few tips, addressing the relationship between Total Float and Free Float, as follows:

  • If Total Float value of an activity is zero, definitely the Free Float value of it is zero. Meaning that the activity is critical to Project Finish Date and to its successor.
  • If Free Float value of an activity is 0, it’s not certain that the Total Float value of it is 0. Meaning that the activity is critical to its successor, but it may not be critical to Project Finish Date.

One thought on “What is the difference between Total Float and Free Float in Primavera P6

Add yours

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Create a website or blog at WordPress.com

Up ↑