Abstract: Migrating workflow is a new technology by which mobile agent is applied to workflow management. MI(Migrating Instance) , work place and workflow engine arc the main three elements which constitute a migrating workflow system. Among them, MI is based on mobile agent computing paradigm for the structure of the business process execulion agent, which can move between work places and by following the their own workflow instructions, uses local service to implement one or more tasks. Migration strategy of MI is one of the most important issues in migrating workflow system. This paper presented a hierarchical structure of the migrating workflow service model aimed to the question for MI how to find services, also proposed a way for finding suit destination host including static and dynamic elements such as the availability of the host hardware, host resources. Finally, we gave a description of the experiment and the results of the discussion and analysis. Experiments show that hierarchical organization of workflow services, and the destination host assessment methods are available to effectively improve the efficiency of the migrating workflow system.

Key words: Migrating workflow, Migrating strategy, MI