Abstract:

The traditional workflow management systems are often based on the server/client model. In this architecture the server can be the bottleneck when lots of workflow is running. When the server is down, all the workflow can not  execute any more. The paper puts forward a decentralized workflow management system model based on the status information. It processes workflow according to the status information. The status information and the trigger event are used to judge the execution condition and the status. Tokens are used to solve the resource competition. There is no independent mechanism to destribute jobs. No host will be the performance bottleneck. The paper discusses the architecture design, key technologies  and system implementation. The architecture provides a new management and control model for complicated workflow.

Key words: workflow management;system architecture;status information;decentralized, token