# Frequent question: What does EF mean in project management?

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## What is EF and LF in project management?

Early Start (ES): Earliest date the activity can start. Early Finish (EF): Earliest date that the activity can finish. Free Float (FF): The maximum number of days the activity can be delayed without delaying any succeeding activity.

## How do you calculate EF and ES?

To Calculate ES and EF times:

1. Label ES = zero at the start of the project.
2. Label EF = 0 + activity time for activities without any preceding activities. …
3. Label ES for each activity, all of whose predecessors have been labeled = Maximum of {EF times of all immediately preceding activities including dummy activities}

## What happens when a project is scheduled by CPM?

Critical Path Method (CPM) Scheduling is the most widely used scheduling technique in the Transportation market. This scheduling technique is used to plan and control a project and to calculate the minimum completion time for a project along with the possible start and finish times for the project activities.

## How do I calculate CPM?

The formula for CPM is as simple as the concept behind it. Since CPM is cost per thousand impressions, then you simply divide the cost by the number of impressions divided by a thousand. So the CPM formula is CPM = 1000 * cost / impressions .

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## How do you calculate ES EF LS LF in Microsoft Project?

First, from the Gantt Chart view you need to add 4 custom columns for (ES, EF, LS, LF). Through clicking on Add New Column from the table in right pane and choose columns of type numbers. Right Click column’s header and choose Custom Fields . Click on formula button from Custom Attributes.

## How do you find the critical path of a project?

You can see the critical path in any task view by highlighting it.

1. On the View tab, pick a view from the Task Views group.
2. Staying on the View tab, select Critical from the Highlight list. The critical path shows up in yellow.
3. To see only the tasks on the critical path, choose the Filter arrow, then pick Critical.

## What is slack time?

Slack time is actually a professional term used in project management to help people figure out just how much time is available between the various steps of a project. It tells you just how much time you have to start a project to keep the project on time.

## How is float calculated in project management?

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 LFT?

The formula for calculating the total float for a task is: LFT at end of task – duration of task – EST at start of task.

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## What is an AON network diagram?

What is Aon network diagram? It is a method of constructing a project schedule network diagram that uses boxes, referred to as nodes, to represent activities and connects them with arrows that show the dependencies. It is also called the activity-on-node (AON) method.