Quality

The totality of characteristics of an entity that bear on its ability to satisfy stated and implied needs. [ ISO 8402, ISO/IEC 9126-1 ]

Quality [ IEEE 829 ]: The degree to which a system, component, or process meets specified requirements.

Quality [ ISO/IEC/IEEE 24765 ]: Ability of a product,service, system, component, or process to meet customer or user needs, expectations, or requirements.

Quality [ IEEE 1490 ]: The degree to which a set of inherent characteristics fulfils requirements.

Quality [ IEEE 829 ]: The degree to which a system, component, or process meets customer or user needs or expectations.

In a contractual environment, or in a regulated environment, such as the nuclear safety field, needs are specified, whereas in other environments, implied needs should be identified and defined. [ ISO 8402 ]
In ISO/IEC 14598 the relevant entity is a software product. [ ISO/IEC 9126-1 ]

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