Business process of aircraft manufacturing industry is a dynamic and complicated system engineering with that the quantity of data is huge. How to build product development module simply and perfectly is always a difficult problem in business process improvement (BPI). The importance of configuration item (CI) technology was emphasized in the lifecycle of aircraft development and the accurate mathematics definition was confirmed referring to Boeing company ideas about aircraft configuration management and the module of product structure. Then, two technologies of configuration management and Petri net (PN) were used to make the product information module simply and the product process module more perfectly. CI and PN were combined based on the two technologies to ensure the consistency and integrity of aircraft development module in product lifecycle. At last, the CI-PN module was proposed to describe the information module and the process module of the whole aircraft development process. The case to describe, analyze and optimize the module of developing the wing-box was given.
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