Exception handling in workflow systems

In this paper, defeasible workflow is proposed as a framework to support ex ception handling for workflow management. By using the "justified" ECA rule s to capture more contexts in workflow modeling, defeasible workflow uses c ontext dependent reasoning to enhance the exception handling capability of workflow management systems. In particular, this limits possible alternativ e exception handler candidates in dealing with exceptional situations. Furt hermore, a case-based reasoning (CBR) mechanism with integrated human invol vement is used to improve the exception handling capabilities. This involve s collecting cases to capture experiences in handling exceptions, retrievin g similar prior exception handling cases, and reusing the exception handlin g experiences captured in those cases in new situations.