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  • 1
    Language: English
    In: Journal of Manufacturing Systems, 1985, Vol.4(1), pp.105-107
    Description: A description of a CAD/CAM system for designing a twist drill is presented. The completed system will specify the appropriate drill design and operating conditions for a specific application and performance criteria. The system is needed because of limitations due to: data management, data inconsistency, data discontinuity, and drill optimization. The completed system must contain a database, statistical analysis package, simulation analysis package, and user friendly input and output modes.
    Keywords: Engineering
    ISSN: 0278-6125
    E-ISSN: 1878-6642
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  • 2
    Language: English
    In: International Journal of Production Research, 01 November 2000, Vol.38(16), pp.3725-3746
    Description: The pull-type manufacturing system is known for its need for a frozen schedule, balanced work load and inability to handle fluctuations in demand. But today research and development are addressing ways to handle a pull-type system to accommodate...
    Keywords: Engineering
    ISSN: 0020-7543
    E-ISSN: 1366-588X
    Source: Taylor & Francis (Taylor & Francis Group)
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  • 3
    Language: English
    In: Int. J. of Manufacturing Research, 2006, Vol 1 Issue 3, pp 314 - 331
    Description: The pull-type manufacturing system is known for its need for a frozen schedule, balanced workload and inability to handle fluctuations in demand. But today's research and development are addressing the ways to handle a pull-type system to accommodate greater fluctuations. One approach is to design the system with greater routing flexibility in that flexible machines and multiple part types are implemented. To enhance the efficiency of flexible systems, effective control mechanisms are required to direct parts and machines throughout the systems. The existing literature concerning control mechanism has primarily been devoted to push-type production systems. This simulation study examined the effects of machine selection rules and scheduling rules for a flexible multi-stage pull system. Results showed that machine selection rules have no significant difference on all performance measures, while several scheduling rules such as SLACK* and First Come First Served (FCFS) demonstrate better performance.
    Keywords: machine selection rules; pull systems; routing flexibility; scheduling rules; flexible machining; flexible manufacturing; multiple part types; simulation; kanban control; performance measures.
    ISSN: 1750-0591
    ISSN: 17500591
    ISSN: 1750-0605
    ISSN: 17500605
    E-ISSN: 1750-0605
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  • 4
    Language: English
    In: Journal of Operations Management, 1984, Vol.4(2), pp.85-97
    Description: Industrial job shops have become increasingly complex, leading to reduced productivity. Complexity has been a function of increasing plant size, accompanied by an increase in the complexity, mix, and volume of parts required for production. Problems of...
    Keywords: Engineering ; Business
    ISSN: 0272-6963
    E-ISSN: 1873-1317
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  • 5
    Language: English
    In: European Journal of Operational Research, 1986, Vol.24(3), pp.379-386
    Description: The loading and scheduling of multiple, flexible manufacturing cells is addressed. A fexible manufacturing system may contain two or more flexible manufacturing cells, where each cell is independent but receives its jobs from a common arrival queue. The procedure for this loading and scheduling is via a mixed integer programming formulation. Several objective functions are presented including: minimizing makespan, minimizing mean flowtime, and minimizing mean lateness. The paper contains a brief discussion of why loading of multiple flexible manufacturing cells is important. It also presents the problem and system in question, reviews the applicable past research and details the necessary assumptions. The mixed integer formulation is then presented and explained, followed by a discussion of the number of variables and constraints necessary to solve the program for a real world sized system. And finally, a simple numeric example is given.
    Keywords: Manufacturing ; Scheduling ; Integer Programming ; Engineering ; Business ; Computer Science
    ISSN: 0377-2217
    E-ISSN: 1872-6860
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  • 6
    Language: English
    In: The International Journal of Advanced Manufacturing Technology, 2009, Vol.43(3), pp.357-364
    Description: The high degree of variety in customer demands causes mass production to become outdated and flexible production to be favored. Routing flexibility can be found in systems that implement general-purpose machines, alternative or identical machines, redundant machine tools, or the versatility of material handling systems. It is recognized that routing flexibility can be treated as a tool for enhancing system performance, such as lead time and inventory reduction. However, its implementation entails a huge cost of installation of flexible machines, automated tool changers and fixtures, and machine operators possessing multiple skills. Therefore, system managers must determine the appropriate level of routing flexibility for a specific system configuration in order to balance benefits and costs incurred. This paper presents a background to and a rational for a routing flexibility measure for a multi-stage flow shop. Instead of merely counting the number of available routes, this measure takes into account the loading balance between machines. Therefore, a manufacturing system with overloaded machines will have less routing flexibility as compared with one that is not overloaded, when both systems have the same number of available routes. An example for demonstrating the applicability of the proposed measure is also illustrated.
    Keywords: Routing flexibility ; Multi-stage ; Flexible flow shop
    ISSN: 0268-3768
    E-ISSN: 1433-3015
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  • 7
    Language: English
    In: The International Journal of Advanced Manufacturing Technology, July, 2009, Vol.43(1-2), p.357(8)
    Description: Byline: Min-Chun Yu (1), Timothy J. Greene (2) Keywords: Routing flexibility; Multi-stage; Flexible flow shop Abstract: The high degree of variety in customer demands causes mass production to become outdated and flexible production to be favored. Routing flexibility can be found in systems that implement general-purpose machines, alternative or identical machines, redundant machine tools, or the versatility of material handling systems. It is recognized that routing flexibility can be treated as a tool for enhancing system performance, such as lead time and inventory reduction. However, its implementation entails a huge cost of installation of flexible machines, automated tool changers and fixtures, and machine operators possessing multiple skills. Therefore, system managers must determine the appropriate level of routing flexibility for a specific system configuration in order to balance benefits and costs incurred. This paper presents a background to and a rational for a routing flexibility measure for a multi-stage flow shop. Instead of merely counting the number of available routes, this measure takes into account the loading balance between machines. Therefore, a manufacturing system with overloaded machines will have less routing flexibility as compared with one that is not overloaded, when both systems have the same number of available routes. An example for demonstrating the applicability of the proposed measure is also illustrated. Author Affiliation: (1) Department of Business Administration, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung, 807, Taiwan (2) Department of Industrial and Manufacturing Engineering, University of Western Michigan, 1903 W Michigan Ave, Kalamazoo, MI, 49008-5200, USA Article History: Registration Date: 13/08/2008 Received Date: 22/02/2008 Accepted Date: 13/08/2008 Online Date: 30/08/2008
    Keywords: Materials Handling Equipment
    ISSN: 0268-3768
    Source: Cengage Learning, Inc.
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  • 8
    Language: English
    In: Expert Systems With Applications, 2004, Vol.26(4), pp.615-623
    Description: Conveyor equipment selection is a complex, and sometimes, tedious task since there are literally hundreds of equipment types and manufacturers to choose from. The expert system approach to conveyor selection provides advantages of unbiased decision making, greater availability, faster response, and reduced cost as compared to human experts. This paper discusses the development of a prototype expert system for industrial conveyor selection. The system, which was developed on Level V Object, provides the user with a list of conveyor solutions for their material handling needs along with a list of suppliers for the suggested conveyor devices. Conveyor types are selected on the basis of a suitability score, which is a measure of the fulfillment of the material handling requirements by the characteristics of the conveyor. The computation of the score is performed through the Weighted Evaluation Method, and the Expected Value Criterion for decision making under risk. The prototype system was successfully validated through two industrial case studies.
    Keywords: Weighted Evaluation Method ; Decision Making ; Expected Value Criterion ; Conveyor Selection ; Computer Science
    ISSN: 0957-4174
    E-ISSN: 1873-6793
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  • 9
    Language: English
    In: Computers & Industrial Engineering, 1992, Vol.23(1), pp.475-478
    Description: Classical information systems development approaches have fallen short of providing useful, information support to managers engaged in strategic decision making. We need methodologies for studying the strategic information needs of managers to determine if strategic information needs are predictable and if any methodology could be successful. Using situation exercises, we have developed a verbal protocol analysis technique based on strategic problem formulation theories and LISP syntax structures to identify and characterize the strategic information needs of managers. We briefly describe the elementary mental activities model theory developed as the basis for the methodology. We describe the experimental methodology and present examples and results of an experiment using the methodology to determine the strategic information needs of Nuclear Government-Oversight-Agency managers.
    Keywords: Engineering ; Applied Sciences
    ISSN: 0360-8352
    E-ISSN: 1879-0550
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  • 10
    Language: English
    In: Journal of Manufacturing Systems, 1995, Vol.14(2), pp.71-79
    Description: Mit Hilfe einer Digitalsimulation wird der Einfluß der Auswahl von Designmetriken auf die Leistungsfähigkeit von Fertigungssystemen zur Montage von Bauteilen auf Leiterplatten untersucht. Betrachtet werden die drei Organisationsformen der Fertigung Job-Shop (klassisches Push-Prinzip), Just-in-Time-Fertigung (Pull-Prinzip) sowie ein flexibles Fertigungssystem für jeweils sechs unterschiedliche Leiterplattenlayouts. Auf die drei Leistungskennzahlen Produktionsrate, Anteil der Fehlteile sowie Zeitanteil der wertschöpfenden Tätigkeiten an der gesamten Produktionszeit besitzt der Grad automatisch montierter Teile den höchsten Einfluß. Eine Reduktion der Gesamtzahl verwendeter Teile führt erst in Verbindung mit einer höheren Automatisierung zu einer Verbesserung der Leistungskennzahlen, die jedoch geringer ausfällt als bei höherer Automatisierung. Eine Reduktion der Bauteiledichte auf beiden Seiten der Leiterplatte verringert lediglich die Anzahl der Fehlteile in einem flexbilen Fertigungssystem und in einem Job-Shop. Unternehmen sollten daher bereits beim Leiterplattenentwurf auf eine möglichst hohe Automatisierbarkeit des Bestückungsvorgangs achten. Der Digitalsimulation liegen folgende Annahmen zugrunde: Batch-Herstellung (nur ein Leiterplattenmodell zu einer Zeit), nur die Maschinenkapazität ist kritisch, Personalkapazität ist unbegrenzt verfügbar, vollständige Qualitätskontrolle, Rüstzeiten und Transportzeiten sind in den Prozeßzeiten enthalten, FIFO-Fertigungsstrategie.
    Keywords: Production System Design ; Production Line ; Assembly Line ; Performance Measures ; Product Design ; Engineering
    ISSN: 0278-6125
    E-ISSN: 1878-6642
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