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Free Float Formula:
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Free Float in Critical Path Method (CPM) is the amount of time that an activity can be delayed without affecting the early start of any succeeding activity or event. It represents the flexibility available for scheduling non-critical activities.
The calculator uses the Free Float formula:
Where:
Explanation: Free Float is calculated by subtracting the slack of an event from the total float available for that activity in the project network.
Details: Calculating Free Float is essential for project scheduling as it helps identify activities that can be delayed without impacting subsequent tasks. This allows project managers to optimize resource allocation and manage project timelines more effectively.
Tips: Enter Total Float and Slack of an Event values in days. Both values must be non-negative numbers. The calculator will compute the Free Float using the formula FF = TF - S.
Q1: What is the difference between Free Float and Total Float?
A: Free Float is the time an activity can be delayed without affecting subsequent activities, while Total Float is the time an activity can be delayed without affecting the project completion date.
Q2: Can Free Float be negative?
A: No, Free Float cannot be negative. If the calculation results in a negative value, it indicates an error in the input values or project scheduling.
Q3: How is Free Float used in project management?
A: Free Float helps identify non-critical activities that have scheduling flexibility, allowing project managers to optimize resource allocation and manage project constraints.
Q4: What happens if Free Float is zero?
A: If Free Float is zero, the activity is on the critical path, meaning any delay will directly affect subsequent activities and potentially the project completion date.
Q5: How does Free Float affect resource leveling?
A: Activities with positive Free Float can be rescheduled to balance resource demands without affecting project timelines, making resource leveling more efficient.