Adding flexibility to workflows through incremental planning |
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Authors: | Abilio Fernandes Angelo E M Ciarlini Antonio L Furtado Michael G Hinchey Marco A Casanova Karin K Breitman |
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Affiliation: | (1) Department of Informatics, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de S. Vicente, 225, Rio de Janeiro, CEP 22451-900, RJ, Brazil;(2) Department of Applied Informatics, Federal University of the State of Rio de Janeiro, UNIRIO Av. Pasteur 458, Rio de Janeiro, CEP 22.290-240, RJ, Brazil;(3) Computer Science Department, Loyola College in Maryland, 4501 N. Charles Street, Baltimore, MD 21210, USA |
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Abstract: | Workflow management systems usually interpret a workflow definition rigidly. However, there are real life situations where
users should be allowed to deviate from the prescribed static workflow definition for various reasons, including lack of information,
unavailability of the required resources and unanticipated situations. Furthermore, workflow complexity may grow exponentially
if all possible combinations of anticipated scenarios must be compiled into the workflow definition. To flexibilize workflow
execution and help reduce workflow complexity, this paper proposes a dual strategy that combines a library of predefined typical
workflows with a planner mechanism capable of incrementally synthesizing new workflows, at execution time. This dual strategy
is motivated by the difficulty of designing emergency plans, modeled as workflows, which account for real-life complex crisis
or accident scenarios. |
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