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Project Management & Agile · Foundational

Non-Functional Requirement (NFR)

A requirement describing conditions or qualities the solution must have, such as performance, security, usability, or availability.

Definition

Also called quality attributes or quality of service requirements. In agile they are often captured in the Definition of Done or as constraints on stories.

Example

Pages must load within 2 seconds for 95% of requests.

Exam tip

NFRs are frequently forgotten; DoD is a good place for cross-cutting NFRs.

Related terms