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## What are the slack time of non-critical activities?

In Project Plan 365, critical tasks are defined to have a total slack of 0 days (or less), whilst non-critical tasks are defined to be **any task that has a total slack greater than 0 days or is complete**. If a critical task is delayed, the project finish date is also delayed.

## How do you calculate slack time?

The Formula

During the project planning period, there’s a formula the project coordinator will use to calculate the slack time for each task at each stage of a project. It’s a simple formula that you’ll easily remember: **Slack time = Latest start time – Earliest start time**.

## How do you calculate total slack in an activity?

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.

## How do you find non-critical activities?

Activities that can be pushed beyond their allotted deadline (up to the slack time) without affecting the project due date are called non-critical activities. You can view non-critical activities and their slack time **by hovering over the activities**.

## How do you use slack time?

Slack time is important since it keeps the project on time and within budget. The longer a project is delayed, the more expensive it gets. To track or calculate slack time, use this formula: **Slack time = Latest time to start – Earliest time to start**.

## What is slack time remaining?

Slack Time Remaining (STR) = **time remaining before due date – remaining processing time**. The shortest STR goes first. Critical Ratio (CR) = Time remaining before due date/Remaining processing time.

## How do you calculate total float time?

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.