Abstract
Our objective is to develop an approach based on case-based reasoning that detects and handles unforeseen deviations that occur in flexible workflow execution. With a case-based approach we aim at supporting the continuation of a deviant workflow execution by utilizing successfully completed processes, where similar deviations emerged. As a first step, this work introduces a novel similarity measure based on time sequence similarity that is able to compare running and completed workflow instances. We implemented and evaluated our approach in the ProCAKE framework. The proposed similarity measure achieves promising results considering runtime and similarity assessment.
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Notes
- 1.
An implementation is included in the ProCAKE framework V1.2 and publicly available under http://procake.uni-trier.de.
- 2.
Note that, in contrast to our approach, A* additionally searches for mappings between the two graphs’ edges which accounts for approximately half of the runtimes. Furthermore, due to resource restrictions, the search queue is limited to 10000 entries which may hinder the algorithm from finding the overall best mapping.
- 3.
Retrieval time of the A* approach was corrected for edge mapping which accounts for approximately halve of the runtime. The experiments were conducted on a personal computer with an 8-core Intel Core i7-6700 CPU @3.4 GHz and 32 GB of RAM.
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Acknowledgements
This work is part of the research project SEMANAS and is funded by the Federal Ministry of Education and Research (BMBF), grant no. 13FH013IX6.
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Schake, E., Grumbach, L., Bergmann, R. (2020). A Time-Series Similarity Measure for Case-Based Deviation Management to Support Flexible Workflow Execution. In: Watson, I., Weber, R. (eds) Case-Based Reasoning Research and Development. ICCBR 2020. Lecture Notes in Computer Science(), vol 12311. Springer, Cham. https://doi.org/10.1007/978-3-030-58342-2_3
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