Christoph Knieke

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Since the major revision 2 of the Unified Modeling Language (UML), activity diagrams have acquired many new features, e.g. hierarchy, data flow and signals. Thus, UML 2 activity diagrams are one of the most versatile formalisms, and can be applied in different domains. Activity diagrams are supported by a number of tools enabling for instance the execution(More)
Errors, inconsistences, incompletenesses and ambiguities in the requirements specification are major reasons for the failure of IT projects. Since the new major version 2 of the UML, the suitability of activity diagrams for modeling requirements has increased significantly. UML 2 activity diagrams are based upon a completely reengineered metamodel including(More)
To keep the software development for vehicles cost efficient, software components are reused for different variants as well as for succeeding generations. Furthermore, cost reductions are achieved by software sharing between the Original Equipment Manufacturer (OEM) and the suppliers. However, as a consequence of the blackboxed view caused by software(More)
A seamless model-based methodology for requirements specification becomes increasingly the key to successful software systems engineering. The enhanced activity diagrams of UML 2 offer a promising intuitive modeling approach for requirements capturing. On this basis, we propose a formal syntax and operational semantics and extend activity diagrams to LADs(More)
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