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Performance Evaluation of Workflows Using Continuous Petri Nets with Interval Firing Speeds

  • Kunihiko Hiraishi
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5062)

Abstract

In this paper, we study performance evaluation of workflow-based information systems. Because of state space explosion, analysis by stochastic models, such as stochastic Petri nets and queuing models, is not suitable for workflow systems in which a large number of flow instances run concurrently. We use fluid-flow approximation technique to overcome this difficulty. In the proposed method, GSPN (Generalized Stochastic Petri Nets) models representing workflows are approximated by a class of timed continuous Petri nets, called routing timed continuous Petri nets (RTCPN). In RTCPN models, each discrete set is approximated by a continuous region on a real-valued vector space, and variance in probability distribution is replaced with a real-valued interval. Next we derive piecewise linear systems from RTCPN models, and use interval methods to compute guaranteed enclosures for state variables. As a case study, we solve an optimal resource assignment problem for a paper review process.

Keywords

Interval Arithmetic Interval Method Input Place Bound Model Check State Space Explosion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Kunihiko Hiraishi
    • 1
  1. 1.School of Information ScienceJapan Advanced Institute of Science and TechnologyIshikawaJapan

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