Research And Improvement On The Dynamicity And Adaptivity Of Flexible Workflow

Traditional workflow system is not flexible and not able to meet the need of dynamicity and adaptivity fully, so it is difficult to handle complicated and versatile transactions. To make the workflow system more flexible, this paper conducts an in-depth research on the dynamicity and adaptivity of the flexible workflow, such as the dynamic modeling mechanism of flexible workflow, the mechanism of detecting logic errors in workflow model, the mechanism of migrating instances dynamically and the workflow exception handling mechanism based on case-based reasoning, and then proposes some new mechanisms and makes some improvements on some original mechanisms.With regard to the dynamic modeling mechanism of flexible workflow, this paper conducts a research on the rule-based dynamic modeling mechanism and present dynamic modeling methods, makes some improvements and proposes a method which could be used to construct workflow model including loop dynamically.As regards the mechanism of detecting logic errors in workflow model, this paper proposes a method which could be used to search all the instance paths in workflow model and makes some improvements on present logic errors detecting mechanism to utilize efficient error detection in complex workflow model.As for the mechanism of migrating instances dynamically, this paper conducts a research on present instance migrating method and proposes a new migrating method, instance stack rollback method, which could be used to utilize the dynamic instances migrating easily and efficiently.As to the adaptive mechanism, this paper focuses on the research of workflow exception handling mechanism based on case-based reasoning and makes some improvements on some procedures in the exception case searching method to make it more flexible and more precise.