1 Scope
This International Standard defines:
a) A quality in use model composed of five characteristics (some of which are further subdivided into
subcharacteristics) that relate to the outcome of interaction when a product is used
in a particular context of use . This system model is applicable to the complete human-computer system , including both computer systems in use and software products in use.
b) A product quality model composed of eight characteristics (which are further subdivided into subcharacteristics)
that relate to static properties of software and dynamic properties of the computer
system . The model is applicable to both computer systems and software products .
The characteristics defined by both models are relevant to all software products and computer systems . The characteristics and subcharacteristics provide consistent terminology for specifying,
measuring and evaluating system and software product quality. They also provide a set of quality characteristics against which stated
quality requirements can be compared for completeness.
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