Role, Function, & Purpose: Not One in the Same

January 7, 2019

Roles, Function, Purpose, & Project


Written by Brian Rabon. June 28, 2011, 10:45am.

You may feel like you’re headed back to English class, but let’s take a moment to discuss the semantics behind the definition and usage of Role, Function, and Purpose as words. They are individual words within the English language that are often used interchangeably. However, not only does each word have its own meaning, but also its own use essential to our understanding of Project Management.

Although many of us have taken English classes, and/or own a dictionary, it is common for one to have trouble separating the definition of these three words. Let’s try a different approach to discussing the meaning of each word.


Like the word “tool”, a role defines where a person or entity will fit into the scope of things. Unlike the carpenter, which is the head, the “tool” will be working under the carpenter, but ahead of the nails. Defining the roles of your team members helps keep everyone organized, knowing who will be responsible for what tasks.


The function of a tool is the tasks that a particular role is assigned to accomplish. A hammer is a tool. To describe the function of a hammer, though, you would say that a hammer drives nails, removes nails, generally hits other lesser tools really, really hard. Another way to describe function is to think about when you read job descriptions–someone may be the Project Manager, but that’s just their role. What will their function at the company actually be? Well to answer that question, we list off the tasks that the PM will be doing. These tasks form the function of a particular role.

Finally, we come to Purpose.

Simply put, the purpose is the “why” behind our function. What is the ultimate goal of our efforts? To what end are we giving of our time and energy? These answers define our purpose.
When you are leading a team, remember that defining these three things–separately–for your team members will be essential to a well oiled working machine, no matter what kind of tools you have to work with.



Share a little biographical information to fill out your profile. This may be shown publicly.

More By This Presenter