ISSEC 2013 Book of Abstracts (Sept. 2013) | Page 5

Tuesday 17 September, 2013 11:00 – 11:40
Scenario-Drive, Model-Based Systems Engineering Dan Powell Principal Consultant Access Testing
Scenario-Driven, Model-Based Systems Engineering Model-Based Systems Engineering, the formalized application of modeling to support systems engineering activities, has the potential to provide many benefits on large and complex projects. Typically cited benefits include facilitating shared understanding between stakeholders based on tailored views of the formal, unambiguous model, and design acceleration and formalized test generation through synthesis from the model. Despite the cited benefits, there is little evidence of industry producing models with the fidelity required to support systems engineering, while at the same time representing the problem and solution space of holistic systems in their environments. For this reason, many of the details required for systems engineering are still captured in co-habitating, semi-formal, ambiguous natural language specifications, and holistic system behaviour, emergent properties and interaction with the environment are understood only at high levels of abstraction. One suggested reason for this is that many modelers develop views of individual aspects of the system and are limited by modelling languages and tools in their ability to relate the views or maintain consistency between them. The result is a set of small models specifically produced to directly represent specific views, providing little assistance in understanding the whole. We present, by way of example, a scenario-based approach to Model-Based Systems Engineering that enables construction of holistic integrated models that support understanding of holistic system behavior, while at the same time enabling synthesis of many useful, single-variable views for communicating at various levels of abstraction, including at the detail required for design and test

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