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P206 - EMISA 2012 - Der Mensch im Zentrum der Modellierung

https://dl.gi.de/handle/20.500.12116/21077
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Auflistung P206 - EMISA 2012 - Der Mensch im Zentrum der Modellierung nach Autor:in "Geist, Verena"

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  • Konferenzbeitrag
    Optional activities in process flows
    (EMISA 2012 – Der Mensch im Zentrum der Modellierung, 2012) Natschläger, Christine; Geist, Verena; Kossak, Felix; Freudenthaler, Bernhard
    A drawback of many business process modelling languages (BPMLs) is that modalities are implicitly expressed through the structure of the process flow. All activities are implicitly mandatory and whenever something should be optional, the process flow is split to offer the possibility to execute the activity or to do nothing. This implies that the decision whether to execute one or more activities is described within another element, such as a gateway. The separation of decision and execution requires additional modelling elements and a comprehensive understanding of the entire process to identify mandatory and optional activities. In this paper, we address the problem and present an approach to highlight optionality in BPMLs based on the Control-Flow Patterns. Furthermore, we study the semantics of explicitly optional activities and show how to apply the general approach to a concrete BPML like the Business Process Model and Notation (BPMN). An explicitly optional activity is deemed to be more intuitive and also positively affects the structural complexity and the understandability of the process flow as shown by a graph transformation approach and a case study.
  • Konferenzbeitrag
    Workflow charts and their semantics using abstract state machines
    (EMISA 2012 – Der Mensch im Zentrum der Modellierung, 2012) Kopetzky, Theodorich; Geist, Verena
    Workflow charts are a novel way to describe business processes and a way of putting more emphasis on the human-computer interaction. They introduce a typed approach to workflow specification in order to improve flexibility in business process technology by proposing a concept for integrating workflow definition and dialogue programming, being also open to business process modelling. Although their precursor has its semantic specification based on Unified Modelling Language semantics, workflow charts currently lack a complete formal semantic specification. Instead of enhancing the Unified Modelling Language semantics, the approach of specifying the semantics of workflow charts using the formalism of Abstract State Machines has been chosen. The resulting description provides a precise operational semantics.