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Model-Based System Design Using SysML: The Role of the Evaluation Diagram
Abstract
Model-based system design is served by a single, multi-layered model supporting all design activities, in different levels of detail. SysML is a modeling language, endorsed by OMG, for system engineering, which aims at defining such models for system design. It provides discrete diagrams to describe system structure and components, to explore allocation policies crucial for system design, and to identify design requirements. In this chapter, SysML is used for the model-based design of enterprise information system architecture, supporting a systemic view of such systems, where software and hardware entities are treated as system components composed to create the system architecture. SysML extensions to facilitate the effective description of non-functional requirements, especially quantitative ones, and their verification are presented. The integration of evaluation parameters and results into a discrete SysML diagram enhances the requirement verification process, while the visualization of evaluation data helps system engineers to explore design decisions and properly adjust system design. Based on the proposed extensions, a SysML profile is developed. The experience obtained when applying the profile for renovating the architecture of a large-scale enterprise information system is also briefly discussed to explore the potential of the proposed extensions.
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