How is float calculated

The project is subdivided into its constituent tasks. The WBS is actually a deliverable-oriented subdivision of the work, focusing on the project deliverables rather than strictly tasks to be completed. Make sure each task represents one interrelated unit of work. If you have too many tasks, it becomes burdensome and micromanaged. If you have too few tasks, there is little point in creating a network diagram because large, unrelated work is managed within the same task.

For example,. The task durations are an integral step in the schedule and they must be estimated accurately. Once the task durations are known, they are entered into the top, middle box. The purpose of the forward pass is to determine the Early Start top left box dates, usually abbreviated ES, and the Early Finish top right box dates, usually abbreviated EF, for each task. These are defined as the earliest dates that the task can start.

The grand result of the forward pass is the completion date of the project, which is the EF top right box of the final task. The reason you have to subtract one is because the task start and end days are inclusive of the duration. For example, if you will be working on a task from days 1 — 5, that is a duration of 5 days , because days 1 and 5 are both included in the task duration. It is the amount of time a Project can be delayed without delaying the externally imposed project finish date by the customer, or the project finish date previously committed to by the Project Manager.

Interfering Float is the amount of time a schedule activity can be delayed or extended from its early start date without delaying the project finish date. However, it should be understood that delaying an activity into interfering float will delay the start of one or more following non-critical activities. If an activity is delayed for the amount of the Free and Interfering Float, then its successor activities are critical. Interfering Float is the maximum amount of time an activity can be delayed without delaying the early start of the succeeding activities and without being affected by the allowable delay of any predecessor activity.

Your email address will not be published. Types of Float. Total Float 2. Total Float Formula. It is a temporary situation, because you cannot leave the project with a negative float.

Here your flexibility has been snatched, and you need to get up for some actions. You need to find ways to get this negative float to settle down. It should come to the 0 from a negative number to get rid of the negative float. If you need an discussion around these concepts with some practical project management scenarios, watch the following video right away. I hope now the basic difference between these floats is clear and Float mystery is not more floating for you.

If you still face any doubts or confusions you may refer to two points- first the definition and second the above table. Independent float comes under free float in PMP.

You can register with us on forum, there are many threads related to free float and total float there. Please Elucidate. Independent float is the amount of float on an activity that does not affect float on preceding or succeeding activities. Hi, Float are of 2 types Free float and Total float. Free Float calculated at activity level can be less than or equal to total float.

Hi, Could please elaborate the difference between Float and free float? Is Float the same as total float or the free float? Dear Krithika Free float can be less than or equal to total float. It is generally not but in some cases we do add one activity at the end with some constraint start and end date , and when we have such we can also see project float in network diagram, please post your PMP related doubts and queries at forum.

Your email address will not be published. Seema Sonkiya. Critical Path — The critical path is the sequence of activities that represents the longest path through a project. It determines the shortest possible project duration All activities on the critical path are called critical path activities Schedule Network Diagram — is a graphical representation of the logical relationships. Also referred to as dependencies, among the project schedule activities PDM Precedence Diagramming Method — A technique used for constructing a schedule model in which activities are represented by nodes.

Now, the question is how is total float calculated? And what is total float in the critical path method? The total float and slack are synonymous. We will discuss negative float later in this post.

In summary, Find the second-longest sequence of activities in the network diagram. Then what is the difference between lag and total float? Both have a different purpose when we look at it from a realistic project management scenario: Lag is used to put delay deliberately to meet some already available dependency or pre-requisite.