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Shop Floor Scheduling with Setup Times -Efficiency versus Leadtime Performance-

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thesis.dvi Shop Floor Scheduling with Setup Times -Efficiency versus Leadtime Performance- Marco Schutten ISBN 90-9009511-X c© 1996, Marco Schutten Printed by Febodruk B.V., Enschede, The Netherlands SHOP FLOOR SCHEDULING WITH SETUP TIMES -EFFICIENCY VERSUS LEADTIME PERFORMANCE- PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Universiteit Twente, op gezag van de Rector Magnificus, prof.dr. Th.J.A. Popma, volgens besluit van het College voor Promoties in het openbaar te verdedigen op donderdag 20 juni 1996 te 16.45 uur. door Johannes Marius Jacobus Schutten geboren op 6 januari 1969 te Hellendoorn Dit proefschrift is goedgekeurd door de promotor: prof.dr. W.H.M. Zijm v Preface During my study at the Faculty of Applied Mathematics at the Uni- versity of Twente, I started to appreciate doing research for practical problems. At that time, I was working on a vehicle routing problem for a Dutch parcel service. The problem was analyzed thoroughly and the proposed solutions were implemented in practice. This gave me much satisfaction. Since I liked doing research, I investigated the pos- sibility of becoming a research assistant. Henk Zijm, the chairman of the Production and Operations Management group of the University of Twente, gave me a chance to study practical problems. I accepted this opportunity. This thesis is the result of four years of research in the area of shop floor scheduling in small batch parts manufacturing shops. It concerns extending existing procedures for shop floor scheduling with practical features. In particular, it focuses on integral scheduling, aiming at an optimal delivery performance under tight capacity constraints, including setup times. Setup times occur, e.g., when machines must be cleaned between two operations. Many people contributed to my research in one way or another. I thank them all. The people below, I like to thank in particular. In the first place, I express my gratitude to Henk Zijm. He g

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