Abstract: The workflow is very important in enterprise information system. Irrational workflow not only leads to an awful operation of enterprise, but also limits the executive of business strategy. The algorithm uses the frequency of workflow, the concept of distance-based outlier detection, empirical rule and method of exhaustion to mine three types of workflow outlier, including less happened workflow outlier of each process(abnormal workflow of each process), less happened workflow outlier of all processes(abnormal workflow of all processes) and never happened workflow outlier(redundant workflow).

Key words: workflow, outlier detection, data mining

摘要： 信息系统中的工作流程设计将影响企业营运绩效及企业策略的正常发挥。该文以工作流的发生频率，结合以距离为基础的孤立点检测概念，使用经验规则和穷举法方式，挖掘出3种类型的异常工作流，包括各流程中较少发生的异常工作流、整体流程里较少发生的异常工作流以及整体流程中从未执行过的异常工作流。

关键词: 工作流, 孤立点检测, 数据挖掘

CLC Number: 

• TP311