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- W2264589405 abstract "The traditional approach to the implementation of Group Technology cells requires that an independent cell be designed for each part family. This creates the problem of deciding the integer number of each shared machine type that must be assigned to each cell. Usually, either the machines in each cell experience overloading or have underutilized capacity. Nor do any of the methods address the issue of stable cell compositions over multiple production periods. It is difficult to develop a method having the ability to integrate the five subproblems of machine grouping, intracell layout, intercell layout, machine sharing and approximate handling system configuration.This dissertation ignores part family formation because it creates a machine sharing problem. It recognizes that, in the case of machine sharing among part families, methods which do not work with flow data will prove ineffective. The reason is that such data alone can model the layout design and material handling alternatives to machine duplication among cells. Hence, instead of the standard binary machine-part matrix, the proposed method uses the flow characteristics captured in a Travel Chart as input data. This allows the five previously mentioned subproblems to be addressed together. This allows the layout and handling capabilities of the manufacturing system to minimize the number of machines which must be duplicated within or among several cells. The machine groups can be virtual, i.e. parts from several families can be loaded on a particular machine shared by several cells. This allows identical machines to be placed in a functional layout for production flexibility.An analysis of the overall complexity of the problem suggested necessary simplifications in the method. The proposed method consists of two phases. Phase I is a linear programming problem and Phase 2 is a quadratic programming problem solved using 0-1 integer programming. The idea of a Maximal Spanning Arborescence borrowed from Graph Theory constitutes the heart of this method. Concepts from related areas such as Facilities Design and Cluster Analysis have also been used. Several examples were solved to show the validity of this method." @default.
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- W2264589405 date "1990-01-01" @default.
- W2264589405 modified "2023-09-23" @default.
- W2264589405 title "A flow decomposition approach for integrated layout design of virtual group technology flowlines" @default.
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