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In the dynamic and capricious market environment it is necessary to effectively optimize, analyze, integrate and decompose complex business processes in the process of enterprise's informationalization. Based on the implementation of one of China's 863/CIMS engineering projects, this paper studies business-component modeling method in the process of enterprise's informationalization, and analyses the advantages of component hierarchy structure and component modeling in this process. Besides, the concept of business process component is given, the independency, correlation and hierarchy are discussed, and the basic principle to confirm the business process component is put forward here. Finally, some concrete approaches of business modeling in the process of enterprise's informationalization are showed.

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