Non Functional Requirement (NFR) — Enabler to Constraint
An NFR was once a Story... an Enabler (a type of a story) to 'enable' -- like a needed piece of the puzzle to complete the picture -- a certain functionality; then once the NFR is built, it becomes a constraint to the backlog. SAFe drew the NFR as a gray oblong shaped figure under the backlog... this is to indicate that NFR is a constraint to the backlog (i.e. program backlog, team backlog, solution backlog and epic backlog) -- see picture below)... lots of people are not aware of this. Here is another visual from SAFe on NFR as…
