Individualized and customized products demand are increasing from time to time. The complexity of the manufacturing process will rise, requiring the use of a flexible system that can easily adjust to changing environmental conditions. The industry has challenges not only in terms of variety of products and processes, but also in terms of controlling the quantity of carbon emissions contained in each product. The actual issues are quite complex, requiring the use of an integrated system capable of communicating and coordinating between assets in the production system. It is required to implement Reference Architecture Model Industry 4.0 (RAMI 4.0)'s functions to deal with these problems, particularly at the integration, communication, and information layers. RAMI 4.0 integration layer contains an Asset Administration Shell (AAS). The AAS can also be referred to as the digital twin of a manufacturing component.
This study designed system integration using AAS by demonstrating it through an information model to improve system flexibility. This study showed AAS identification, interaction between AAS, and information model of system integration. The flow of communication and information in the production system will be divided into several scenarios. The scenarios created are based on several possible activities that may occur, such as determining which machine is the best machine for each product, determining the route, and determining when uncertain activities occur.

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