The growing importance of commercial off-the-shelf software products requires adapting some software engineering practices, such as requirements elicitation, to this emergent framework. Also, some specific new activities arise, among which selection of software packages plays a prominent role. There are different types of requirements, such as managerial, political, and, of course, quality requirements. Quality requirements are often difficult to check. This is partly due to their nature, but there is another reason that can be mitigated, namely the lack of structured and widespread descriptions of product domains (that is, categories of software products such as ERP systems, graphical or data structure libraries, and so on). This absence hampers the accurate description of software products and the precise statement of quality requirements, and consequently overall product selection and confidence in the result of the process. Our methodology for building structured quality models helps solve this drawback. Slides here.
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