12 January 2012

What is the Origin of the term "Functional Requirements"

I have been over editing Wikipedia again.  This time on Functional Requirements.

Yes, it's the poor quality that revolves around the Requirements and analysis topic that drew me in.  Wikipedia's content in this space is a classic example of the plumber with leaky pipes syndrome.  Each time I see it I just can't help myself.  I have to edit.

But this time I am stuck.

My question for you dear reader is this;

Where does the idea of the Functional Requirement (as opposed to just a plain ol regular requirement) come from?  What is the origin story of this mystical term?

And while I am here, can you share your view on what the essential elements are that make a requirement "functional?"

Thanks in advance,
Craig