What Is Total Float And Free Float In Primavera?

How does Primavera calculate total float?

Total Float is the difference between the Late and Early Dates.

Total Float = Late Start – Early Start (or Late Finish – Early Finish), Total Float is a measure of how much scheduling flexibility an activity has.

After Total Float is calculated for each activity, you will find that many activity have Total Float = 0d..

Can critical path have float?

Historically, activities with zero float were defined as the critical path. … Critical path activities can have float; hence the critical path can have float.

How do you calculate float time?

Float time is the amount of time a task can be delayed without it causing a delay to other tasks in the project. We calculate this by finding the latest start time and subtracting the earliest start time.

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.

How is total float 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 free float and total 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.

Can free float be more 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.

What if total float is negative?

Essentially, negative float is the amount of time that must be saved to bring the project to completion on time. Negative slack can also indicate a scheduling problem when, for example, a task’s start date is set earlier than the end date for a preceding task in the critical path.

Can you have a negative free float?

Yes float can be negative.

How is free float defined?

A company’s free float refers to the number of outstanding shares that are available to the public for trade.

How do you calculate free float and independent float?

Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. It is computed for an activity by subtracting the tail event slack from its total float.

Why are negative lags bad?

Many planners argue that this takes time and this leads to the use of negative lag to cut down both the complexity of a schedule and the number of activities within it. A common argument which favours the use of negative lag is that the alternatives available lead to schedule ‘bloating’.