Model Driven Architecture (MDA) views application development as a continuous transformation of models of the target system. This paper proposes a methodology which extends this view to non-functional properties. The basic idea is the separation of two different roles in the development process: the role of the measurement designer and the role of the application designer. The former provides a library of measurement definitions which is later used by the latter to annotate functional application models with non-functional property specifications. This paper defines the notion of context models to allow the measurement designer to provide measurement definitions at different levels of abstraction independently of concrete applications.
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