Real-time scheduling for hybrid flowshop in ubiquitous manufacturing environment |
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| Affiliation: | 1. College of Economics, Shenzhen University, China;2. HKU-ZIRI Laboratory for Physical Internet, Department of Industrial and Manufacturing Systems Engineering, The University of Hong Kong, Hong Kong;1. Dipartimento di Ingegneria dell''Informazione, Università di Siena, Italy;2. Dipartimento di Ingegneria dell''Informazione, Università di Siena, Via Roma 56, 53100, Italy;3. Laboratoire d''Informatiqued′Informatique – Polytech''Tours, Université de Tours, France;1. Institute of Information Management, Department of Information Management and Finance, National Chiao Tung University, Taiwan;2. School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo 2007, Australia;1. Department of Industrial Engineering, University of Sistan and Baluchestan, Zahedan, Iran;2. Department of Industrial Engineering, Tsinghua University, Beijing 100084, China;3. Department of Industrial Engineering, K. N. Toosi University of Technology, Tehran, Iran |
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| Abstract: | This paper discusses the implementation of RFID technologies, which enable the shop floor visibility and reduce uncertainties in the real-time scheduling for hybrid flowshop (HFS) production. In the real-time HFS environment, the arriving of new jobs is dynamic, while the processes in work stages are not continuous. The decision makers in shop floor level and stage level have different objectives. Therefore, classical off-line HFS scheduling approaches cannot be used under these situations. In this research, two major measures are taken to deal with these specific real-time features. Firstly, a ubiquitous manufacturing (UM) environment is created by deploying advanced wireless devices into value-adding points for the collection and synchronization of real-time shop floor data. Secondly, a multi-period hierarchical scheduling (MPHS) mechanism is developed to divide the planning time horizon into multiple shorter periods. The shop floor manager and stage managers can hierarchically make decisions for their own objectives. Finally, the proposed MPHS mechanism is illustrated by a numerical case study. |
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| Keywords: | Real-time scheduling Hybrid flowshop Ubiquitous manufacturing |
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