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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=TF0-S
FF0 - Free Float?TF0 - Total Float?S - Slack of an Event?

Free Float used in CPM Example

With values
With units
Only example

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

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

Here is how the Free Float used in CPM equation looks like.

18Edit=24Edit-6Edit
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Free Float used in CPM Solution

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

FIRST Step Consider the formula
FF0=TF0-S
Next Step Substitute values of Variables
∴ FF0=24d-6d
Next Step Prepare to Evaluate
∴ FF0=24-6
Next Step Evaluate
∴FF0=1555200s
LAST Step Convert to Output's Unit
∴FF0=18d

Free Float used in CPM 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
Total Float
Total float is the period by which an activity can shift its timing without affecting the relevant schedule completion date.
Symbol: TF0
Measurement: TimeUnit: d
Note: Value can be positive or negative.
Formulas to find Total FloatOpen Variable
Slack of an Event
Slack of an Event in a network is the difference between the latest event time and the earliest event time at its terminal point or node.
Symbol: S
Measurement: TimeUnit: d
Note: Value should be greater than 0.
Formulas to find Slack of an EventOpen Variable

Other Formulas to find Free Float

​Go Free Float given Indenpendent Float
FF0=IF0+S

Other formulas in Critical Path Method category

​Go Total Float in CPM
TF0=LFT-EFT
​Go Independent Float used in CPM
IF0=FF0-S
​Go Interfering Float
IF=TF0-FF0
​Go Slack of Event in CPM
S=TF0-FF0

How to Evaluate Free Float used in CPM?

Free Float used in CPM evaluator uses Free Float = Total Float-Slack of an Event to evaluate the Free Float, The Free Float used in CPM formula is defined as the time or duration by which any activity can be delayed without delaying other succeeding activities. The slack mentioned can be head event slack (earliest time of j-i). Free Float is denoted by FF0 symbol.

How to evaluate Free Float used in CPM using this online evaluator? To use this online evaluator for Free Float used in CPM, enter Total Float (TF0) & Slack of an Event (S) and hit the calculate button.

FAQs on Free Float used in CPM

What is the formula to find Free Float used in CPM?
The formula of Free Float used in CPM is expressed as Free Float = Total Float-Slack of an Event. Here is an example- 0.000208 = 2073600-518400.
How to calculate Free Float used in CPM?
With Total Float (TF0) & Slack of an Event (S) we can find Free Float used in CPM using the formula - Free Float = Total Float-Slack of an Event.
What are the other ways to Calculate Free Float?
Here are the different ways to Calculate Free Float-
  • Free Float=Independent Float+Slack of an EventOpenImg
Can the Free Float used in CPM be negative?
No, the Free Float used in CPM, measured in Time cannot be negative.
Which unit is used to measure Free Float used in CPM?
Free Float used in CPM is usually measured using the Day[d] for Time. Second[d], Millisecond[d], Microsecond[d] are the few other units in which Free Float used in CPM can be measured.
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