This model relates the individual use cases for each stakeholder to the activity- properties (such as efficiency or effectiveness) of appropriate and relevant product quality attributes, which in turn are linked to the software product properties (grouped into functional and structural properties), which in turn are connected to one or more of the functional test cases or manual inspection items or static code analysis rules or environment-related metrics. The sample graph presented pertains to the quality attributes maintainability and usability and similar future work is proposed to cover other quality attributes.