TY - JOUR T1 - Parallel Machine Scheduling with Re-entrant Jobs with Consideration of Set up Times AU - Kayisoglu, Betul AU - Bekli, Seyma AU - Sahin, Ayse Sena AU - Akyurek, Gamze Gul AU - Aydinli, Ruveyda AU - Copur, Sevda Nur AU - Ekinci, Tugba PY - 2024 DA - December Y2 - 2024 DO - 10.55549/epstem.1602789 JF - The Eurasia Proceedings of Science Technology Engineering and Mathematics JO - EPSTEM PB - ISRES Publishing WT - DergiPark SN - 2602-3199 SP - 311 EP - 319 VL - 32 LA - en AB - We study the identical parallel machine problem with re-entrant jobs. Re-entrant jobs require to pass through the processing line multiple times. In many real-life manufacturing systems with parallel machine environments, one of the scheduling problems that needs to be addressed is the order of jobs on each machine with re-entrant jobs. In addition, manufacturing systems may require periodic maintenance, systematic manufacturing equipment cleaning, or predetermined upper limits on the overtime. Therefore, machine availability may vary during the scheduling horizon. We propose an integer programming model to find the optimal sequence of the re-entrant jobs at parallel machines with consideration of machine availability. The model aims to reduce setup times and maximize capacity utilization by scheduling tasks with similar set up requirements consecutively. We tested the proposed model at a panel line manufacturing company located in Turkey. The order of the panels is scheduled optimally by the proposed model for 3 different instances on the identical parallel machines for the coating process. We also provided relevant information on the user interface we developed to make the proposed scheduling model usable to by the company. The proposed model and interphase offer a systematic approach to panel line planning and can also be implemented in other industries. KW - Production scheduling KW - Re-entrant scheduling KW - Parallel machine scheduling KW - Sustainable manufacturing KW - Integer programming model. CR - Kayısoglu, B., Bekli, S., Sahin, A. S., Akyurek, G. G., Aydınlı, R., Copur, S. N., & Ekinci, T. (2024). Parallel machine scheduling with re-entrant jobs with consideration of set up times. The Eurasia Proceedings of Science, Technology, Engineering & Mathematics (EPSTEM), 32, 311-319. UR - https://doi.org/10.55549/epstem.1602789 L1 - https://dergipark.org.tr/en/download/article-file/4446230 ER -