Non-functional requirements (NFRs) are the poor, ugly sisters to the functional requirements. They are often left out, or worse written in wooly and non SMART terms; “the website shall be available 24/7”. Is this what happened with HMRC? The website that allows UK citizens to complete their tax returns on-line has gone down, just as the deadline looms. I wonder if this is a case of the non-functional requirements around performance, scalability volumes etc being forgotten about or just not tested for. Inexcusable really.
© Copyright 2015 · dancingmango – Marc McNeill