Real-time embedded architectures consist of software and hardware parts. Meeting non-functional constraints (e.g., real-time constraints) greatly depends on the mappings from the system functionalities to software and hardware components. Thus, there is a strong demand for precise architecture and allocation modeling, amenable to performance analysis. The paper proposes a model-driven approach for the assessment of the quality of allocations of the system functionalities to the architecture. We consider two technical domains: the UML domain for the definition of the model elements, and a non functional property analysis domain, external to UML, used for formal verification. This paper focuses on 1) the specification of expected behavior by UML activities, specialized to support the synchronous paradigm, 2) the definition of an analysis model for temporal properties: the Modular and Hierarchical Time Petri Nets, 3) the transformation from the specification model to the analysis model.