Functional Viewpoint

Multi-formalism in Different Levels of Abstraction for Requirements Engineering and Architectural Design of Real-Time Embedded Systems

“…Functional viewpoint [33] aims at representing the system requirements as correlated and structured components. This viewpoint provides different views of system functions, details of system services and the user functions interaction.…”

“…It is quite remarkable the importance of MDSE approaches for well-defined strategies, in terms of integrated design and support for RTES development [162]. Considering the knowledge of the author of this thesis and based on the previous state of the art analysis, the definition of a methodology, with a consistent proposition of design activities [153] to design RTES constraints [19] [161], supporting empirical analysis [159], providing formal evaluations [158] and performing views and viewpoints refinements [126], [33], [142], [163] into one single approach is not in the scope of studies found in this literature review. Thus, Table 2 was created in order to summarize the contributions and focus of research studies detailed in the literature review.…”

“…Requirements viewpoint [18] of RTES aims at ensuring that the complete set of needs, requirements and restrictions of a system will be captured and, posteriorly, transformed into a valid set of requirements for all activities of the software life cycle [31], [26], [21], [32]. Furthermore, the Requirements viewpoint provides the basis for further Functional, Logical and Technical viewpoints of architectural system design [33], [18].…”

“…The Software Platform Embedded Systems (SPES) methodology provides a framework toward RTES development, while providing guidelines to software and system design. The adoption of SPES viewpoints and their perspectives contributes to minimizing the complexity of RTES development, as it performs separation of non-functional concerns and functional system services [33]. The proposed decomposition of system services can favor one's understanding and development of such services [61], [62].…”