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Dictionary by pitch.dog
Requirements, stories & service design · Core

Non-functional requirement

Also called: NFR

ELI5

How well or under what conditions the system must work.

Used in conversation

“Accessibility is a non-functional requirement with measurable criteria.”

Definition

A requirement concerning qualities or constraints such as security, performance, reliability or accessibility.

Here “Non-functional requirement” means: A requirement concerning qualities or constraints such as security, performance, reliability or accessibility.

Pitch context

You will see “Non-functional requirement” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches requirements, stories & service design.

Why it matters: It helps a reader interpret requirements, stories & service design without confusing the measure, decision, role or evidence being discussed.

When the words have to travel

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Sources & evidence · 2

Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.