Some thoughts on quality models: evolution and perspectives
â€˜Qualityâ€™ is an evolving concept, quite difficult to be defined, whatever the application domain observed. As Tom Demarco said, itâ€™s true that â€œyou cannot control what you cannot measureâ€. But coming back, itâ€™s also true that â€œyou cannot measure what you cannot defineâ€ and again â€œyou cannot define what you donâ€™t knowâ€. Thus, moving from a common, shared definition is the priority for any activity and creates also measures from any measurement and benchmarking activity. Along the years, several â€˜quality modelsâ€™ (QM) have been produced: the scope for non-functional attributes (part of the â€˜qualityâ€™ definition, also according to ISO) is enlarging. This paper discusses the evolution of the quality concept (broader than the one referred to the solely â€˜productâ€™) in order to observe which perspectives can be drawn up for the next years.
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