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The profile for Modeling and Analysis of Real-Time and Embedded systems (MARTE) defines a framework for annotating non-functional properties of embedded systems. In particular, the SAM (Schedulability Analysis Model) sub-profile offers stereotypes for annotating UML models with the needed information which will be extracted to fulfill a scheduling phase. However, SAM does not allow designers to specify data to be used in the context of adaptive systems development. In this position paper, we present the related works around the development of adaptive real-time and embedded systems and discuss why we seek to improve the meta-models of MARTE.