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    Item type:Publication, Access status: without files ,
    Potential risks and benefits of service-oriented collaboration - Basic considerations and results from an empirical study
    (2008-02)
    Schulte, Stefan
    ;
    Repp, Nicolas
    ;
    Eckert, Julian
    ;
    Berbner, Rainer
    ;
    Von Blanckenburg, Korbinian
    Service-oriented Architectures enable companies to cooperate on a completely new level. Although different publications have dealt with the usage of Service-oriented Collaboration in various scenarios, the potential risks and benefits of this collaboration in certain industries have not been observed in detail. In this paper, we present basic considerations about the impact of Service-oriented Collaboration on organizations. Furthermore, we evaluate our assumptions with results from a survey we conducted in the German banking industry. Using data from 52 banks, it turns out that the potential benefits of Service-oriented Collaboration exceed the suspected risks - therefore we deduce that this kind of collaboration is suited to improve the cooperation between and in companies.
    Publicationtype: Conference Paper
      17
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    Towards automated monitoring and alignment of service-based workflows
    (2008-02)
    Repp, Nicolas
    ;
    Eckert, Julian
    ;
    Schulte, Stefan
    ;
    Niemann, Michael
    ;
    Berbner, Rainer
    Using Web services and Service-oriented Architectures to implement cross-organizational workflows has become state-of-the-art for the realization of collaborations between enterprises. Here, a key issue is the monitoring of workflows and services based on given business requirements and the handling of deviations from those requirements to fulfil Service Level Agreements. In this paper we present an approach to the automated monitoring and alignment of service-based workflows. We describe a policy language for the specification of requirements and deviation handling as well as a distributed architecture supporting automated monitoring and alignment in service ecosystems.
    Publicationtype: Conference Paper
      30
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    Item type:Publication, Access status: without files ,
    Queuing-based capacity planning approach for web service workflows using optimization algorithms
    (2008-02)
    Eckert, Julian
    ;
    Schulte, Stefan
    ;
    Repp, Nicolas
    ;
    Berbner, Rainer
    ;
    Steinmetz, Ralf
    One major challenge for service-oriented workflows in digital ecosystems is capacity planning for cross-organizational Web service workflows in order to avoid performance degradation. In order to analyze the execution capacity of Web service workflows and to plan the workflow control, queuing theory can be used to describe the average performance behavior of a workflow. By addressing capacity planning of Web service workflows, resource usage becomes more and more important. Capacity planning and performance measurement are crucial to ensure that the workflow execution remains feasible and SLA violations due to overload are avoided. Thus, this paper presents a capacity planning approach for Web service workflows based on queuing theory to support capacity planning decisions. Further we describe an optimization algorithm how to achieve an optimal utilization of the invoked Web services at minimal costs.
    Publicationtype: Conference Paper
      17