Engineering change information propagation in aviation industrial manufacturing execution processes

Engineering change (EC) is common in the aviation industry, which affects the production efficiency and the stability of a manufacturing system as a frequent disturbance. The way how to respond to EC in manufacturing execution processes is one of the most important and complex issue in manufacturing industries. And the prime step for manufacturing department to accomplish EC efficiently is to detect and identify changes correctly and in time. According to special features of the aviation industry, engineering bill of material (EBOM) and manufacturing BOM (MBOM) models are proposed to save EC information accurately and timely by using version vectors to record version information. EC may affect the production process directly by those changed items, but it can make a potential impact on some related items. The EC propagation mechanism is described to collect all the items impacted by EC. The method of Tree-Root tracking and the ripple strategy of expand searching with capacity restriction are explained by a composite material manufacturing case. It figures out the range of impact of EC which may help to point out what, where, and when need to rearrange the schedule in order to optimizing the implement of EC especially after manufacturing commences. The approach was proved to be practical with a case of aviation carbon fiber composite material components.

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