In this paper , prior evaluation of an assembly production system using a digita 【 factory is proposed. This virtuai factery consists of severa1 software agents that correspond to assembled parts and components of a production line such as assembly machines . Therefbre , its oonfiguration can be easily changed 」 n a virtual line , each agent cooperates mutually to achieve the assembly processes . An assembly production plan can be determined by interactive simulation in real tlme in 山is digital 飴otory . Wilh 面 s digital factory regular production status f()r di餓 ヲ rent fioor configurations , interruption status by an express production , and trouble occurrence status such as a machine breakdown can be monitored . Thus this digita1 飴ctory can be used as a prior evaiuation tool from both the centralized production system and the autonomous production system viewpoint
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