Download or read book Integrated Operational Decision making in Flexible Manufacturing Systems with Considerations of Quality and Reliability written by Huidong Zhang and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inherent interactions between operational decisions and their impact on the product quality and equipment reliability necessitate those decisions being optimized concurrently, especially in highly flexible manufacturing systems, such as semiconductor manufacturing fabs, where those interactions are even stronger and where flexibility allows for such decisions to be implemented. This dissertation addresses multiple challenges associated with such integrated operational decisions in the manufacturing process with considerations of quality and reliability. The first part of this dissertation proposes an integrated decision-making policy for production and maintenance operations on a single machine under uncertain demand, with concurrent considerations and learning of yield dependencies on the equipment conditions and production rates. This policy is obtained through a two-stage stochastic programming model, which considers the variable demand, machine degradation, and maintenance times. This model incorporates outsourcing decisions and operational decisions regarding reworking, scraping of imperfect products to ensure the demand is adequately met. A closed-form reinforcement learning method is utilized to learn yield dependencies. Simulations confirm the necessity of yield learning and show the proposed method outperforms the traditional, fragmented approaches where the effects of production rates and machine conditions on the resulting yield rates are not considered. In the second part of this dissertation, a novel optimization framework that couples a recently introduced approach for robust control of overlay errors in photolithography processes with a strategic selection of overlay measurement markers to enable improved control of overlay errors using a reduced number of measurements. Application of this method to the data and models from an industrial-scale semiconductor lithography process shows that the newly proposed combination of the robust overlay control paradigm and optimized marker selection enables improved overlay control, even with a significantly reduced number of markers. Thus, the new methodology enables the reduction of measurement times and subsequent overall cycle time, without deteriorating the outgoing product quality. The measurement selection method suggested in the second part of this dissertation pursues optimality from a purely quality control aspect. Since any measurement down-selection procedure directly affects cycle-times of the resulting process and the understanding of yield rate behaviors, the final portion of this dissertation tackles the task of developing an optimization framework from a more system-level operational aspect. In this method, an optimal number of markers is decided that maximizes the profit considering revenue earned from perfect layer patterns, cost of misidentified bad layers, as well as production and measurement cost. At the same time, the distribution of those markers is optimized considering one's ability to estimate actuator uncertainties and to understand the yield rate behavior. Application of this method to the data and models from an industrial-scale semiconductor lithography process, as well as sensitivity analyses, are presented to illustrate the proposed method and evaluate the effects of a variety of relevant parameters on the profit of the system

Download or read book Joint Maintenance and Production Operations Decision Making in Flexible Manufacturing Systems written by Merve Celen and published by . This book was released on 2016 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: In highly flexible and highly integrated manufacturing systems such as semiconductor manufacturing, equipment has the capability of conducting different manufacturing operations and/or producing at various speeds. In such systems, degradation of a machine depends highly on the operations performed on it. Selection of operations executed on an equipment changes the degradation dynamics and hence directly affects preventive maintenance (PM) decisions. On the other hand, PM actions interrupt production and change the system reliability and equipment availability, which in turn directly affects decisions as to which operations should be performed on which piece of equipment. These strong dynamic interactions between equipment condition, operations executed on the equipment and product quality necessitate a methodology that integrates the decisions of maintenance scheduling and production operations. Currently, maintenance and production operations decision-making are two decoupled processes. To address the aforementioned problems, in this dissertation, we devise integrated decision-making policies for maintenance scheduling and production operations in flexible manufacturing systems (FMS) optimizing a customizable objective function that takes into account operation-dependent degradation models and production targets. The objective function consists of costs associated with scheduled and unscheduled maintenance, rewards for successfully completed products and penalties for missed production targets. In order to maximize the objective function, a paradigm based on metaheuristic optimization and evaluation of candidate solutions via discrete-event simulations of operations of the underlying manufacturing system is used. Firstly, we propose an operation-dependent decision-making policy for a multiple-product/multiple-equipment manufacturing system, where each product requires several operations for completion and the sequence in which different product types are produced is a priori given. The proposed method is tested in simulations of a cluster tool and the results show that operation-dependent maintenance decision-making outperforms the case where maintenance decisions are made without considerations of operation-dependent degradation dynamics. Secondly, we propose an integrated decision-making policy for maintenance scheduling and product sequencing where the sequence in which different product types can be arranged in a way to maximize the customizable profit function. The results show that jointly making maintenance and production sequencing decisions consistently and often significantly outperforms the current practice of making these decisions separately. Finally, a joint maintenance scheduling and production operations decision making policy is proposed for a flexible manufacturing system where the degradation states of the equipment are not perfectly observable, but are rather hidden states of a known Hidden Markov Model (HMM). Proposed integrated decision-making policy under imperfect degradation state observations is shown to consistently outperform the benchmark policies.

Download or read book Flexible Manufacturing Systems written by Horst Tempelmeier and published by John Wiley & Sons. This book was released on 1993-10-13 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now, this comprehensive and systematic overview of both the design models and quantitative solution methods for FMS support, configuration, and operation rectifies that problem. Students, production managers/planners, and FMS installation planners can now find everything they need in one authoritative and up-to-date source.

Download or read book Design and Analysis of Integrated Manufacturing Systems written by W. Dale Compton and published by National Academies Press. This book was released on 1988-02-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and Analysis of Integrated Manufacturing Systems is a fresh look at manufacturing from a systems point of view. This collection of papers from a symposium sponsored by the National Academy of Engineering explores the need for new technologies, the more effective use of new tools of analysis, and the improved integration of all elements of manufacturing operations, including machines, information, and humans. It is one of the few volumes to include detailed proposals for research that match the needs of industry.

Download or read book Flexible Manufacturing Systems Recent Developments written by A. Raouf and published by Elsevier. This book was released on 1995-02-09 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible Manufacturing Systems (FMS) involve substituting machines capable of performing a wide and redefinable variety of tasks for machines dedicated to the performance of specific tasks. FMS can also be programmed to handle new products, thus extending the machines' life cycles. Thus they represent a change from "standardized goods produced by customized machines" to "customized goods produced by standardized machines". This volume contains new and updated material in this field, and will be of great interest to researchers, managers and students concerned with problems related to flexible manufacturing systems.

Download or read book Design of Flexible Production Systems written by Tullio Tolio and published by Springer Science & Business Media. This book was released on 2008-12-11 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade, the production of mechanical components to be assembled in final products produced in high volumes (e.g. cars, mopeds, industrial vehicles, etc.) has undergone deep changes due to the overall modifications in the way companies compete. Companies must consider competitive factors such as short lead times, tight product tolerances, frequent market changes and cost reduction. Anyway, companies often have to define production objectives as trade-offs among these critical factors since it can be difficult to improve all of them. Even if system flexibility is often considered a fundamental requirement for firms, it is not always a desirable characteristic of a system because it requires relevant investment cost which can jeopardize the profitability of the firm. Dedicated systems are not able to adapt to changes of the product characteristics while flexible systems offer more flexibility than what is needed, thus increasing investment and operative costs. Production contexts characterized by mid to high demand volume of well identified families of products in continuous evolution do not require the highest level of flexibility; therefore, manufacturing system flexibility must be rationalized and it is necessary to find out the best trade-off between productivity and flexibility by designing manufacturing systems endowed with the right level of flexibility required by the production problem. This new class of production systems can be named Focused Flexibility Manufacturing Systems-FFMSs. The flexibility degree in FFMSs is related to their ability to cope with volume, mix and technological changes, and it must take into account both present and future changes. The required level of system flexibility impacts on the architecture of the system and the explicit design of flexibility often leads to hybrid systems, i.e. automated integrated systems in which parts can be processed by both general purpose and dedicated machines. This is a key issue of FFMSs and results from the matching of flexibility and productivity that respectively characterize FMSs and Dedicated Manufacturing Systems (DMSs). The market share of the EU in the machine tool sector is 44%; the introduction of focused flexibility would be particularly important for machine tool builders whose competitive advantage is based on the ability of customizing their systems on the basis of needs of their customers. In fact, even if current production contexts frequently present situations which would fit well with the FFMS approach, tradition and know-how of machine tool builders play a crucial role. Firms often agree with the focused flexibility vision, nevertheless they decide not to pay the risk and efforts related to the design of this new system architecture. This is due also to the lack of well-structured design approaches which can help machine tool builders to configure innovative systems. Therefore, the FFMS topic is studied through the book chapters following a shared mission: "To define methodologies and tools to design production systems with a minimum level of flexibility needed to face, during their lifecycle, the product and process evolution both in the technological and demand aspects. The goal is to find out the optimal trade-off between flexibility and productivity". The book framework follows the architecture which has been developed to address the FFMS Design problem. This architecture is both broad and detailed, since it pays attention to all the relevant levels in a firm hierarchy which are involved in the system design. Moreover, the architecture is innovative because it models both the point of view of the machine tool builder and the point of view of the system user. The architecture starts analyzing Manufacturing Strategy issues and generating the possible demand scenario to be faced. Technological aspects play a key role while solving process plan problems for the products in the part family. Strategic and technological data becomes input when a machine tool builder performs system configuration. The resulting system configurations are possible solutions that a system user considers when planning its system capacity. All the steps of the architecture are deeply studied, developing methods and tools to address each subproblem. Particular attention is paid to the methodologies adopted to face the different subproblems: mathematical programming, stochastic programming, simulation techniques and inverse kinematics have been used. The whole architecture provides a general approach to implement the right degree of flexibility and it allows to study how different aspects and decisions taken in a firm impact on each other. The work presented in the book is innovative because it gives links among different research fields, such as Manufacturing Strategy, Process Plan, System Design, Capacity Planning and Performance Evaluation; moreover, it helps to formalize and rationalize a critical area such as manufacturing system flexibility. The addressed problem is relevant at an academic level but, also, at an industrial level. A great deal of industrial sectors need to address the problem of designing systems with the right degree of flexibility; for instance, automotive, white goods, electrical and electronic goods industries, etc. Attention to industrial issues is confirmed by empirical studies and real case analyses which are presented within the book chapters.

Download or read book Optimal Design of Flexible Manufacturing Systems written by Ulrich A.W. Tetzlaff and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible manufacturing systems are complex production systems with considerable high investment costs. This book intends to show the reader how the design of such a system can be optimized. Thereby it addresses the academic world in management science and industrial engineering as well as system planners in industry. First the design problems are analysed in detail and a planning concept is presented. Afterwards possible tools for the design process are described, as there are: mathematical programming, queueing networks, computer simulation, perturbation analysis, petri nets, group technology, and knowledge based systems. The major part of the book, however, concerns the description of existing optimization models based on mathematical programming. Each model is explained and discussed in detail and for new models, developed by the author, numerical examples are given. Finally some distinct guidelines are presented which help the system planners to select the appropriate model for their planning problems.

Download or read book Flexible Manufacturing written by David J. Parrish and published by . This book was released on 1993 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the concept of flexible manufacturing has been around for over twenty years, applications have until recently been expensive and unique. Developments over the last five years, however, have made widespread applications of flexible manufacturing systems achievable. This book is intended to inform industry's decision-makers of the extent of advances and how to increase both the flexibility and the productivity of their production system. Not only is a comprehensive overview of the relevant concepts given, but also practical details on the implementation of a flexible manufacturing system and discussion of the benefit such a system can carry. The book avoids much of the jargon in this area, and the presentation is direct and clear. Many illustrations aid understanding, making this an ideal primer for engineers, executives and students who need to know both what flexible manufacturing is and how such systems work before deciding whether such technology is applicable to their own operation. The author's experience in the development and integration of flexible manufacturing projects worldwide is evident in this text, making it an extremely authoritative and informative book.

Download or read book Operations Research Models in Flexible Manufacturing Systems written by F. Archetti and published by Springer. This book was released on 1989-02-27 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume aims at giving an updated account of the most relevant issues in the area of Flexible Manufacturing Systems with special emphasis to the problems of Simulation, Modelling, Planning, Scheduling, Economical Evaluation. A tutorial description of these topics is provided from the perspective of Operations Research. Both stochastic and deterministic models are taken into consideration and real world applications are considered. An annotated bibliography is provided at the end of the volume. Contributions: Akella: Real time part dispatch in flexible assembly, test and manufacturing systems; Arbib, Lucertini, Nicolò: Optimization models for FMS; Archetti, Sciomachen: Development, analysis and simulation of Petri net models: an application to AGV systems; Buzacott: Flexible models of FMS, and Modelling FMS; Filippini, Rovetta: Economic aspects in factory automation in relation to system flexibility; Fishman: Statistical considerations in the simulation of FMS; Jovane: Flexible automation, a need for industry - a challenge for research; Maione, Fanti, Turchiano: Large scale Markov chain modelling of transfer lines; Romanin-Jacur: FMS queueing network. Models theory and applications; Serafini, Ukovich, Kirchner, Giardina, Tiozzo: Job shop scheduling, a case study; Taylor: Advanced robotics in FMS; Villa: Hierarchical architectures for production planning and control; Deserti, Giraldo: FMS, a classification of recent literature.

Download or read book Decision Making in the Manufacturing Environment written by Ravipudi Venkata Rao and published by Springer Science & Business Media. This book was released on 2007-06-06 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows how graph theory and matrix approach, and fuzzy multiple attribute decision making methods can be used in manufacturing. It proposes a methodology that will make decision making in the manufacturing environment structured and systematic. The book uses case studies to present the applications of decision making methods in real manufacturing situations.

Download or read book Flexible Manufacturing Systems written by Kathryn E. Stecke and published by . This book was released on 1988 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Expert System for Flexible Manufacturing Systems written by Ashraf S. Youssef and published by LAP Lambert Academic Publishing. This book was released on 2010-11 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for a new Quality Control approach has risen recently especially when dealing with automated systems in industry. The high cost of automated manufacturing systems requires a good quality control system that would improve production, reduce the number of scrapped products and help fast decision making when deviations from accepted quality levels occur. The situation becomes more complicated when dealing with Flexible Manufacturing Systems (FMS). Those systems are known for their capability to produce different types of products in moderate quantities. This in its turn requires an effective and flexible quality control system. This research studies the development of an Expert Quality Control System (EQCS) that is based on the available computer technology in flexible manufacturing. The purpose of EQCS is to help quality engineers diagnose deviations from required quality requirements, and to take the right decisions to improve the process and yield product quality.

Download or read book Flexible Manufacturing Systems written by and published by . This book was released on 1985 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Manufacturing Systems written by Reza A. Maleki and published by . This book was released on 1991 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geared to managers and technical personnel, this book explains the component technologies of Flexible Management Systems (FMS), and explores their relationship with each other and as a whole. The author discusses robotics, progammable logic controllers and automatic guided vehicles.

Download or read book Flexible Manufacturing Systems written by Fred Choobineh and published by . This book was released on 1986 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimal Design of Flexible Manufacturing Systems written by U. Tetzlaff and published by . This book was released on 1990-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA SP 7500 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1976 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: