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What is the Triple Constraint and how to control it?


This is a term that may appear in your exam and you should know in detail because it covers 3 knowledge areas of the PMBOK.

Notice that you can find it under the name of Project Managment Triangle or Iron Triangle .


What is it?

The triple constraint is a model that basically demonstrates in pictorial fashion, the key attributes that must be handled effectively for successful completion and closure of any project.

Those attributes are:

  1. Scope
  2. Time
  3. Cost

These three elements of a project are known to work in tandem with one another. Where one of these elements is restricted or extended, the other two elements will then also need to be either extended/increased in some way or restricted/reduced in some way. There is a balancing of the three elements that only when fully understood by the Project Manager, allows for the successful planning, resourcing and execution of a project. At the end of the day, these are the key elements of a successful project and these are the things that will determine whether or not you have successfully managed a project.

How to control those three attributes ?


You will find in the exam some questions related to those knowlegde areas and some of then will be about the control processes.

In the PMBOK you find Scope Control, Time Control and Cost Control. When memorizing those Inputs , Tools and techniques and Outputs I will give you one tip that helped me a lot!

You will see that those 3 processes have some common ITTOs. Those ittos I called them the "Basic ITTOs for Control" and you can find them in the following chart. Read them and try to remember them!


Those are the ones that are commun to all the control processes and now for remembering each control process (cost, time and scope) you have to know which special ITTO needs to be added.



As you can see if you remember the BASIC CONTROL ITTOs you will be able to memorize faster all those 3 processes which are really important.

This was useful for me and I hope it will help you as well.

As always thanks for reading and leave us a comment or post a question here.




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