To solve the tasks ranking issue with fuzzy characteristics in workflow, a tasks ranking model in workflow was proposed. In this model, taking characteristics of tasks in workflow into consideration, a characteristics system was constructed based on time properties of tasks, the global time properties of cases and the importance of tasks. Based on the characteristics system, fuzzy analytic hierarchy process was applied to implement the tasks ranking with fuzzy characteristics in workflow to improve the service capability of workflow management system. Finally, an applicatio...