Production Scheduling

Generally speaking, scheduling is the procedure of mapping a set of tasks or jobs (studied objects) to a set of target resources efficiently. More specifically, as a part of a larger planning and scheduling process, production scheduling is essential for the proper functioning of a manufacturing enterprise. This book presents ten chapters divided into five sections. Section 1 discusses rescheduling strategies, policies, and methods for production scheduling. Section 2 presents two chapters about flow shop scheduling. Section 3 describes heuristic and metaheuristic methods for treating the scheduling problem in an efficient manner. In addition, two test cases are presented in Section 4. The first uses simulation, while the second shows a real implementation of a production scheduling system. Finally, Section 5 presents some modeling strategies for building production scheduling systems. This book will be of interest to those working in the decision-making branches of production, in various operational research areas, as well as computational methods design. People from a diverse background ranging from academia and research to those working in industry, can take advantage of this volume

Modeling, design and scheduling of computer integrated manufacturing and demanufacturing systems

This doctoral dissertation work aims to provide a discrete-event system-based methodology for design, implementation, and operation of flexible and agile manufacturing and demanufacturing systems. After a review of the current academic and industrial activities in these fields, a Virtual Production Lines (VPLs) design methodology is proposed to facilitate a Manufacturing Execution System integrated with a shop floor system. A case study on a back-end semiconductor line is performed to demonstrate that the proposed methodology is effective to increase system throughput and decrease tardiness. An adaptive algorithm is proposed to deal with the machine failure and maintenance. To minimize the environmental impacts caused by end-of-life or faulty products, this research addresses the fundamental design and implementation issues of an integrated flexible demanufacturing system (IFDS). In virtue of the success of the VPL design and differences between disassembly and assembly, a systematic approach is developed for disassembly line design. This thesis presents a novel disassembly planning and demanufacturing scheduling method for such a system. Case studies on the disassembly of personal computers are performed illustrating how the proposed approaches work

Design and Management of Manufacturing Systems

Although the design and management of manufacturing systems have been explored in the literature for many years now, they still remain topical problems in the current scientific research. The changing market trends, globalization, the constant pressure to reduce production costs, and technical and technological progress make it necessary to search for new manufacturing methods and ways of organizing them, and to modify manufacturing system design paradigms. This book presents current research in different areas connected with the design and management of manufacturing systems and covers such subject areas as: methods supporting the design of manufacturing systems, methods of improving maintenance processes in companies, the design and improvement of manufacturing processes, the control of production processes in modern manufacturing systems production methods and techniques used in modern manufacturing systems and environmental aspects of production and their impact on the design and management of manufacturing systems. The wide range of research findings reported in this book confirms that the design of manufacturing systems is a complex problem and that the achievement of goals set for modern manufacturing systems requires interdisciplinary knowledge and the simultaneous design of the product, process and system, as well as the knowledge of modern manufacturing and organizational methods and techniques

Intelligent shop scheduling for semiconductor manufacturing

Semiconductor market sales have expanded massively to more than 200 billion dollars annually accompanied by increased pressure on the manufacturers to provide higher quality products at lower cost to remain competitive. Scheduling of semiconductor manufacturing is one of the keys to increasing productivity, however the complexity of manufacturing high capacity semiconductor devices and the cost considerations mean that it is impossible to experiment within the facility. There is an immense need for effective decision support models, characterizing and analyzing the manufacturing process, allowing the effect of changes in the production environment to be predicted in order to increase utilization and enhance system performance. Although many simulation models have been developed within semiconductor manufacturing very little research on the simulation of the photolithography process has been reported even though semiconductor manufacturers have recognized that the scheduling of photolithography is one of the most important and challenging tasks due to complex nature of the process. Traditional scheduling techniques and existing approaches show some benefits for solving small and medium sized, straightforward scheduling problems. However, they have had limited success in solving complex scheduling problems with stochastic elements in an economic timeframe. This thesis presents a new methodology combining advanced solution approaches such as simulation, artificial intelligence, system modeling and Taguchi methods, to schedule a photolithography toolset. A new structured approach was developed to effectively support building the simulation models. A single tool and complete toolset model were developed using this approach and shown to have less than 4% deviation from actual production values. The use of an intelligent scheduling agent for the toolset model shows an average of 15% improvement in simulated throughput time and is currently in use for scheduling the photolithography toolset in a manufacturing plant

Energy-Efficient Technologies for High-Performance Manufacturing Industries

Ph.DDOCTOR OF PHILOSOPH

Patterns In System Modeling Theory

Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2008Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2008Günümüzde, İşletmeler sürekli değişen dış ortam ile karşı karşıyadırlar. Uygun yönetim için daha iyi iş akışı ve değişime uyum sağlayacak işletme modelleri gereklidir. İş akışı modellemenin hedefi, iş akışı sisteminini anlamak, performans değerlendirmesini üstünleştirmek, karar vermeyi desteklemek ve sürekli iyileştirme için değiştirme cesareti vermektir. Bu hedefe ulaşmak için, etkili enformasyon teknolojisi gerkelidir. Bu nedenle, İşletme içersinde bilgiye ulaşımı destekleyecek etkili enformasyon teknolojisi gereklidir. Organizasyon yönetimine destek amacı ile model entegrasyonuna destek için bu proje referans mimarisi ve modellemesi çercevesinde pattern modellerin geliştirilmesi üzerine odaklanmıştır. Dahası, Referans mimarisini belirleyen ve Üretim proseslere rehberlik eden pattern modelleri, ilgisi olamayan komponentler arasındaki ilişkiyi kurup prosesin ana elemanlarını tanımlar. Bu çalışmamda içeriği sağlamak için elektronik ticaret konusunda uluslararası camia tarafından Kabul gören Renkli Petri ağları ve UML dili şeçilmiştir.Enterprises today are faced with a rapidly changing environment. There is a need for better process management and increased integration, and enterprise modeling is necessary for proper management. The goal of process modeling is to improve understanding of what happens in the process system, enhance performance evaluation of some parts of the process, support decision-making activities and encourage changes for continuous improvement. Therefore, efficient information technology is required to support the availability of information in the enterprise. In an effort to achieve the integration of models aimed at supporting various facets of organizational management, this project focused on the development of pattern modeling in the context of reference architectures and methodologies. Furthermore the Pattern models, that underlie various reference architectures and the guidelines on modeling manufacturing processes, specifies the main elements of an process and provides a relation between its interrelated components. To provide the context that this work was performed in, Colored Petri Nets and UML which were selected because they result from and are promoted by the major international coalition in the area of e-commerce.Yüksek LisansM.Sc

Proceedings of the Caltech Conference on Very Large Scale Integration, held at the California Institute of Technology 22 - 24 January 1979 ; Organized by the Caltech Computer Science Department and the Caltech Industrial Associates Office

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