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Nonfunctional requirement
A software requirement that describes not what the software will do, but how the software will do it, for example, software performance requirements, software external interface requirements, software design constraints, and software quality attributes. Nonfunctional requirements are sometimes difficult to test; therefore, they are usually evaluated subjectively. Contrast with functional requirement. Sometime referred to as design constraints.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Computer; Software
- Category: Software engineering
- Organization: IEEE Computer Society
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