# Quick Answer: How Does Primavera Calculate Total Float?

## What does total float mean in Primavera?

In Primavera P6, there are two important values: Total Float and Free Float.

Total Float: is the amount of time an activity can be delayed without delaying the Project Finish Date.

Free Float: is the amount of time an activity can be delayed without delaying its Successor Activity Finish Date..

## Why is my total float negative p6?

In Primavera P6 there are two main reasons for existence of negative float: Project finish date is later than our defined “Must Finish By Date”. We have defined a constraint, which has overruled our pre-defined relationships among activities.

## What is the difference between slack and float?

That means that slack is referring to the amount of time that an activity can start later than originally planned and float is about the time when an activity takes longer than originally planned. … Total float is the amount of time that an activity can be delayed without delaying the completion of the project.

## What does negative float mean in Primavera?

Negative float, also known as negative slack, is the amount of time beyond a project’s scheduled completion that a task within the project requires. Total float is the amount of time a task within a project can be delayed without endangering the project deadline.

## Why is total float important?

Total float is how many delays are allowed from the beginning of the project which will not interfere with the projected completion date. … These delays are known as the total float, and project management must always keep this number in mind to ensure that the project will be finished on time.

## Can you have a negative free float?

Yes float can be negative.

## Can free float be greater than total float?

The total float is the amount an activities progress can be extended without delaying critical path activities, and, therefore, the project. Free float, however, shows how much an activity can be postponed without disturbing a successor activity. Free float is a more stringent measure than total float.

## How total float is calculated?

Total float is often known as the slack. You can calculate the total float by subtracting the Early Start date of an activity from its Late Start date. You can get it by subtracting the activity’s Early Finish date from its Late Finish date.

## What is the difference between total and free float?

Total float, also called float or slack, is the amount of time an activity can be delayed without delaying the overall project duration. … Free float is the amount of time an activity can be delayed without delaying the early start of any immediate successor activity.

## How is free float defined?

Free float, also known as public float, refers to the shares of a company that can be publicly traded and are not restricted (i.e., held by insiders. … In other words, the term is used to describe the number of shares that is available to the public for trading in the secondary market.

## How do you calculate negative float?

Total Float is amount of time that an activity can be delayed from its early start date without delaying the project finish date. (Negative TF of 48 days in your case will indicate your project is 48 days behind schedule). The calculation for TF =LF-EF which produces Finish Float; or LS-ES which produces Start Float.

## What is critical path and float?

The longest path through the network is the critical path. The difference between the early end date and the required completion date of the project is the total project float, and the start date of each activity is the early start date.

## What is free float in scheduling?

Free float is an amount of time that a schedule activity can be delayed without delaying the early start of any immediately following schedule activities.

## What does negative total float mean?

Negative total float tasks indicate probable failure to meet one or more schedule target completion goals. Negative total float means you are in danger of delaying an activity constraint date or the entire project or activity relationships are either missing or connected incorrectly.

## Why are negative lags bad?

Why? To put it simply, using negative lag breaks the whole idea of using the logic type in the first place. Logic is specifically designed to allow a forward and backward pass calculation in order to determine early and late dates followed by subsequent free and total float.