Scheduling seminar

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schedulingseminar@rtime.felk.cvut.cz

February 2022

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[Scheduling seminar] John W. Fowler (Arizona State Univ.) | March 2 | Scheduling Problems in Semiconductor Wafer Fabrication Facilities: Part 1
by Zdeněk Hanzálek 28 Feb '22

28 Feb '22

Dear scheduling researcher, We are delighted to announce the talk given by John W. Fowler (Arizona State Univ.). The title is " Scheduling Problems in Semiconductor Wafer Fabrication Facilities: Part 1". The seminar will take place on Zoom on Wednesday, March 2 at 14:00 UTC. Join Zoom Meeting https://cesnet.zoom.us/j/96133782270?pwd=VVFGRGJoSS9IZ1d5NkRyamFiZUh5QT09 Meeting ID: 961 3378 2270 Passcode: 292650 You can follow the seminar online or offline on our Youtube channel as well: https://www.youtube.com/channel/UCUoCNnaAfw5NAntItILFn4A The abstract follows. Semiconductors enable the systems and products that we use to work, communicate, travel, entertain, harness energy, treat illness, make new scientific discoveries, and more. Semiconductor manufacturing is among the most complex manufacturing systems in existence today. This complexity makes scheduling semiconductor manufacturing systems extremely difficult. In this two-part seminar, we discuss scheduling problems in this challenging domain. In the first part, we describe the manufacturing process and identify typical scheduling problems found in semiconductor manufacturing systems at the workstation, work area, factory, and supply chain levels. We also discuss approaches for scheduling problems with secondary resources and for factory level scheduling. The next talk in our series will be given by: Lars Mönch (Uni of Hagen) | March 16 | Scheduling Problems in Semiconductor Wafer Fabrication Facilities: Part 2 For more details, please visit https://schedulingseminar.com/ With kind regards Zdenek, Mike and Guohua -- Zdenek Hanzalek Industrial Informatics Department, Czech Institute of Informatics, Robotics and Cybernetics, Czech Technical University in Prague, Jugoslavskych partyzanu 1580/3, 160 00 Prague 6, Czech Republic https://rtime.ciirc.cvut.cz/~hanzalek/

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Kangbok Lee (POSTECH) | February 16 | Scheduling Heuristics for Steelmaking Continuous Casting Processes
by Zdeněk Hanzálek 14 Feb '22

14 Feb '22

Dear scheduling researcher, We are delighted to announce the talk given by Kangbok Lee (POSTECH, Korea). The title is "Scheduling Heuristics for Steelmaking Continuous Casting Processes". The seminar will take place on Zoom on Wednesday, February 16 at 14:00 UTC. Join Zoom Meeting https://cesnet.zoom.us/j/91094063787?pwd=d01UbWRPOHJQUy93dnBhWU5QclRLQT09 Meeting ID: 910 9406 3787 Passcode: 284143 You can follow the seminar online or offline on our Youtube channel as well: https://www.youtube.com/channel/UCUoCNnaAfw5NAntItILFn4A The abstract follows. Steelmaking-Continuous Casting (SCC) is a bottleneck in the steel production process and its scheduling has become more challenging over time. In this paper, we provide an extensive literature review that highlights challenges in the SCC scheduling and compares existing solution methods. From the literature review, we collect the essential features of an SCC process, such as unrelated parallel machine environments, stage skipping, and maximum waiting time limits in between successive stages. We consider an SCC scheduling problem with as objective the minimisation of the weighted sum of cast break penalties, total waiting time, total earliness, and total tardiness. We formulate the problem as a mixed-integer linear programming model and develop an iterated greedy matheuristic that solves its subproblems to find a near-optimal solution. Through numerical experiments, we show that our algorithm outperforms two types of genetic algorithms when applied to test instances. The next talk in our series will be given by: John W. Fowler (Arizona State Univ.) | March 2 | Scheduling Problems in Semiconductor Wafer Fabrication Facilities: Part 1 For more details, please visit https://schedulingseminar.com/ With kind regards Zdenek, Mike and Guohua -- Zdenek Hanzalek Industrial Informatics Department, Czech Institute of Informatics, Robotics and Cybernetics, Czech Technical University in Prague, Jugoslavskych partyzanu 1580/3, 160 00 Prague 6, Czech Republic https://rtime.ciirc.cvut.cz/~hanzalek/

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