Open Access

ARTICLE

Detecting and Repairing Data-Flow Errors in WFD-net Systems

by Fang Zhao¹, Dongming Xiang^2,*, Guanjun Liu¹, Changjun Jiang¹, Honghao Zhu³

1 School of Electronics and Information Engineering, Tongji University, Shanghai, 201804, China
2 School of Information Science and Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
3 School of Computer Engineering, Bengbu University, Bengbu, 233030, China

* Corresponding Author: Dongming Xiang. Email:

Computer Modeling in Engineering & Sciences 2022, 131(3), 1337-1363. https://doi.org/10.32604/cmes.2022.018872

Received 22 August 2021; Accepted 03 December 2021; Issue published 19 April 2022

Abstract

Workflow system has become a standard solution for managing a complex business process. How to guarantee its correctness is a key requirement. Many methods only focus on the control-flow verification, while they neglect the modeling and checking of data-flows. Although some studies are presented to repair the data-flow errors, they do not consider the effect of delete operations or weak circulation relations on the repairing results. What's more, repairing some data-flow errors may bring in new errors. In order to solve these problems, we use workflow net with data (WFD-net) systems to model and analyze a workflow system. Based on weak behavioral relations and order relations in a WFD-net system, we formalize four kinds of data-flow errors. After then, we reveal the relations between these errors and organize them into a hierarchy. Furthermore, we propose some new methods to repair data-flow errors in a WFD-net system based on system requirements and repair strategies. Finally, a case study of campus-card recharging shows the applicability of our methods, and a group of experiments show their advantages and effectiveness.

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Keywords

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