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Project Management Orientation

Calculating Free Float and Total Float

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Free Float
Total Float

How to Determine Free Float

Calculations for float time use ES, EF, LS , and LF values.

The calculation for free float, which again is the amount of time an activity can be delayed without affecting the early start date of the successor activity, is:

Free Float = ES (successor task) - EF (predecessor task)

In the following example, the calculation for free float between activity A and activity B is FF = 5 - 3 = 2.  This means that task A can finish as late as day 5 without affecting task B.

Free Float Example
1: Getting Started
2: Define the Project Team
3: Team Management
4: Identify and Validate Requirements
5: Create Decomposition Structures
6: Risk Management
7: Project Estimates
8: Project Schedules
9: Change Management
10: Project Control and Execution
Defining the Project
11: Project Management Review
12: Project Closeout
13: Project Management Tool Suite
14: Self-Assessment and Final Exam
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Seven Keys
Case Study
WWPMM
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