Total Float, also known as Slack, is the total amount of time that a task can be delayed without affecting the overall project completion date. It is an essential concept in project scheduling and critical path management. Float helps project managers assess scheduling flexibility and adjust plans without causing major disruptions.
Formula for Total Float:
TotalFloat=LateStart−EarlyStartTotal Float = Late Start – Early Start
OR
TotalFloat=LateFinish−EarlyFinishTotal Float = Late Finish – Early Finish
Uses:
- Helps project managers adjust schedules dynamically.
- Identifies which tasks can be delayed if needed.
- Prevents unnecessary stress on non-critical tasks.
Zero Float vs. Positive Float:
- Zero Float: Task must be completed on time to avoid delays.
- Positive Float: Task has some flexibility before it impacts the schedule.
