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## How do you calculate total slack time on a network?

Total slack is calculated as the **smaller value of the Late Finish minus the Early Finish field, and the Late Start minus the Early Start field**.

## What is slack time equal to?

Slack time = **Latest time to start – Earliest time to start**.

## How do I calculate slack time in Excel?

The formula for calculating the Late start time is: (LS=LF-Duration). The Slack time is calculated as **LF minus EF**. It can also be calculated as LS minus ES. If the slack is zero, then the task is on the critical path.

## What is the total slack time of a project?

If the task does not have a successor, then it is calculated as the number of days it can be delayed before it impacts the Project Finish Date. Total Slack is **the number of days a task can be delayed before it impacts the Project Finish Date**.

## How do you calculate activity float?

To calculate total float, **subtract the task’s earliest finish (EF) date from its latest finish (LF) date**. It looks like this: LF – EF = total float. Alternately, you can subtract the task’s earliest start (ES) date from its latest start (LS) date, like this: LS – ES = total float.

## How do you calculate ES LS EF LF?

**Formulas for calculating Total Float and Free Float are as follows:**

- Total Float = LS – ES (it is also calculated by LF – EF)
- Free Float = Lowest ES of successors – EF.

## What is minimum slack time?

Least slack time (LST) scheduling is **an algorithm for dynamic priority scheduling**. It assigns priorities to processes based on their slack time. Slack time is the amount of time left after a job if the job was started now. This algorithm is also known as least laxity first.

## What do you mean by slack time why is it needed to calculate?

Slack time, used in Program Evaluation and Review Technique (PERT), **denotes how much an activity can be delayed beyond its earliest start date**, without causing any problems in the completion of the project by its due date.