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Free Float Formula

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Free Float is the period by which an activity can shift in its timing without affecting the Early Start of any succeeding activity or event. Check FAQs
FF0=EFT-EST-tactivity
FF0 - Free Float?EFT - Early Finish Time?EST - Early Start Time?tactivity - Activity Time?

Free Float Example

With values
With units
Only example

Here is how the Free Float equation looks like with Values.

Here is how the Free Float equation looks like with Units.

Here is how the Free Float equation looks like.

7Edit=46Edit-19Edit-20Edit
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HomeIcon Home » Category Engineering » Category Mechanical » Category Industrial Engineering » fx Free Float

Free Float Solution

Follow our step by step solution on how to calculate Free Float?

FIRST Step Consider the formula
FF0=EFT-EST-tactivity
Next Step Substitute values of Variables
∴ FF0=46d-19d-20d
Next Step Convert Units
∴ FF0=4E+6s-1.6E+6s-1.7E+6s
Next Step Prepare to Evaluate
∴ FF0=4E+6-1.6E+6-1.7E+6
Next Step Evaluate
∴FF0=604800s
LAST Step Convert to Output's Unit
∴FF0=7d

Free Float Formula Elements

Variables
Free Float
Free Float is the period by which an activity can shift in its timing without affecting the Early Start of any succeeding activity or event.
Symbol: FF0
Measurement: TimeUnit: d
Note: Value should be greater than 0.
Formulas to find Free FloatOpen Variable
Early Finish Time
Early Finish Time is the earliest point in time when the scheduled activity can complete.
Symbol: EFT
Measurement: TimeUnit: d
Note: Value should be greater than 0.
Formulas to find Early Finish TimeOpen Variable
Early Start Time
Early Start Time is the earliest point in time when the scheduled activity can begin.
Symbol: EST
Measurement: TimeUnit: d
Note: Value should be greater than 0.
Formulas to find Early Start TimeOpen Variable
Activity Time
Activity time is the estimated task duration based on preceding logic and constraints.
Symbol: tactivity
Measurement: TimeUnit: d
Note: Value should be greater than 0.
Formulas to find Activity TimeOpen Variable

Other formulas in Time Estimation category

​Go Early Finish Time
EFT=EST+S
​Go Expected Waiting Time for Customers in Queue
Wq=λaµ⋅(µ-λa)
​Go Expected Waiting Time for Customers in System
Ws=1µ-λa
​Go Independent Float
IF0=EFT-LST-tactivity

How to Evaluate Free Float?

Free Float evaluator uses Free Float = Early Finish Time-Early Start Time-Activity Time to evaluate the Free Float, Free float is the period by which an activity can shift in its timing without affecting the Early Start of any succeeding activity or event. Free Float is denoted by FF0 symbol.

How to evaluate Free Float using this online evaluator? To use this online evaluator for Free Float, enter Early Finish Time (EFT), Early Start Time (EST) & Activity Time (tactivity) and hit the calculate button.

FAQs on Free Float

What is the formula to find Free Float?
The formula of Free Float is expressed as Free Float = Early Finish Time-Early Start Time-Activity Time. Here is an example- 8.1E-5 = 3974400-1641600-1728000.
How to calculate Free Float?
With Early Finish Time (EFT), Early Start Time (EST) & Activity Time (tactivity) we can find Free Float using the formula - Free Float = Early Finish Time-Early Start Time-Activity Time.
Can the Free Float be negative?
No, the Free Float, measured in Time cannot be negative.
Which unit is used to measure Free Float?
Free Float is usually measured using the Day[d] for Time. Second[d], Millisecond[d], Microsecond[d] are the few other units in which Free Float can be measured.
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