In most of software systems, designers try to include some self-adaptation facilities to increase the reliability of their systems. How- ever, despite of the new methods and technologies in software engineer- ing such as CBSE, or AOP, it is still difficult to talk about adaptation since adaptation policies might impact the architecture, the configura- tion data, and some extra-functional features as well. We suggest in this paper a rule-based approach to model adaptation policies that enables the description of both architectural and functional adaptation and to relate them with extra-functional properties.