Computing and Information Systems - Research Publications

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Type: Chapter × Start date: 2010 × End date: 2014 × Author: Polyvyanyy, Artem ×

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    Business Process Model Abstraction
    Polyvyanyy, A ; Smirnov, S ; Weske, M ; Vom Brocke, J ; Rosemann, M (Springer-Verlag, 2010-01-01)
    In order to execute, study, or improve operating procedures companies document them as business process models. Often business process analysts capture every single exception handling or alternative task handling scenario within a model. Such a tendency results in large process specifications. The core process logic becomes hidden in numerous modeling constructs. To fulfill different tasks companies develop several model variants of the same business process at different abstraction levels. Afterwards, maintenance of such model groups involves a lot of synchronization effort and is erroneous. We propose an abstraction technique that allows generalization of process models. Business process model abstraction assumes a detailed model of a process to be available and derives coarse grained models from it. The task of abstraction is to tell significant model elements from insignificant ones and to reduce the latter. We propose to learn insignificant process elements from supplementary model information, e.g., task execution time or frequency of task occurrence. Finally, we discuss a mechanism for user control of the model abstraction level - an abstraction slider.
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    The Structured Phase of Concurrency
    Polyvyanyy, A ; Bussler, C ; Bubenko,, J ; Krogstie, J ; Pastor, O ; Pernici, B ; Rolland, C ; Sølvberg, A (Springer Berlin Heidelberg, 2013)
    This extended abstract summarizes the state-of-the-art solution to the structuring problem for models that describe existing real world or envisioned processes. Special attention is devoted to models that allow for the true concurrency semantics. Given a model of a process, the structuring problem deals with answering the question of whether there exists another model that describes the process and is solely composed of structured patterns, such as sequence, selection, option for simultaneous execution, and iteration. Methods and techniques for structuring developed by academia as well as products and standards proposed by industry are discussed. Expectations and recommendations on the future advancements of the structuring problem are suggested.
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    Flexible Service Systems
    Polyvyanyy, A ; Weske, M ; Demirkan, H ; Spohrer, JC ; Krishna, V (SPRINGER, 2011-01-01)
    Service science combines scientific, management, and engineering disciplines to improve the understanding of how service systems cooperate to create business value. Service systems are complex configurations of people, technologies, and resources that coexist in a common environment of service provisioning. While the general concepts of service science are understood and agreed upon, the representation of service systems using models is still in its infancy. In this chapter, we look at business processes and their role in properly representing service systems. We propose flexible process graphs, a high-level process modeling language, and extend it in order to specify service systems and their compositions within shared environments in a flexible way. The discussion in this chapter is the first step towards a formal description of service science environment, including service systems, networks, and whole ecology.