Non-Functional Requirements (glossary)

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Quality attributes or characteristics that are desired in a system, that define how a system is supposed to be. (Created for SEBoK)


This definition was developed for the SEBoK.


Non-functional requirements contrast with functional requirements that define what the system must be able to do or perform. Typical non-functional requirements include availability, reliability, maintainability, safety, and security.

SEBoK v. 2.6, released 20 May 2022