摘要： 为提高工作流系统的适应性和可维护性，提出了一种可重构的工作流执行模型。该模型面向活动行为的相异性和动态性，把活动状态作为描述过程状态的特征，给出了过程状态的形式化定义，建立了过程状态间的层次化关系与优先级关系。在该基础上，严格地给出了基于基本特征集和基于相容特征集的过程状态精化方法，设计了自动生成过程状态转移关系的算法。最后，结合实际应用讨论了一种基于规则的执行模型可重构性实现方法。应用该方法能够提高工作流管理系统适应企业业务过程需求快速变化的能力。

关键词: 工作流执行模型；过程状态精化；重构

Abstract: A reconfigurable workflow enactment model is presented to enhance the adaptability and maintainability of workflow management system. In the model, process states are formally defined based on activity states. At the same time, a hierarchical relation and a priority relation between process states are also formally described. Then, two basic process state refinement methods are presented and an algorithm is proposed which can implement automatic generation of process state transitions. A rule-based approach used to implement the reconfiguration of the model is discussed. The proposed enactment model can significantly improve the adaptability of workflow management systems in changing business environments.

Key words: Workflow enactment model; Process state refinement; Reconfiguration