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Questions tagged [non-functional]

Nonfunctional requirements are those expectations that a system must obey (or should obey, if objectives instead of requirements) that are not functionality of the system. Functionality of a system is a change of some input state(s) to different output state(s). Examples of nonfunctional requirements include nearly all of software architectural goals/qualities, as itemized in the expanded description below.

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Is this a functional or non-functional requirement? [duplicate]

Is this requirement: The system is required to have an easier GUI to make it more usable by any kind of user (normal or disabled user) a functional or non-functional requirement ? And Why ?
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