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Dynamic resource allocation in flow lines with station-level flexible operation sequences and alternative resources.

机译:具有站级灵活操作序列和备用资源的流线中的动态资源分配。

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摘要

In this thesis, the impact of station selection rules for resource allocation, resource selection rules among alternative resources for stations, and number of resource duplicates available in a manufacturing flow line is investigated in terms of their effect on system throughput, manufacturing lead time, resource utilization levels, and process wait time for resources. A hypothetical flow line with ten stations is modeled using the Arena(TM) Simulation package and experimental results are analyzed via the Analysis of Variance (ANOVA) using the SASRTM statistical analysis software.;Similar to typical maintenance, repair, and overhaul (MRO) type of manufacturing flow lines, each station in the simulated model consists of operation sequence alternatives, as well as resource alternatives for each operation. A resource represents certain technical capability required by an operation; it can be an operator or a set of tools or both. Such flow lines typically run under limited number of resources in addition to lack of real-time visibility in terms of completion time of operations and actual whereabouts of resources. Therefore, utilizing the resources efficiently while achieving the highest possible throughput for a flow line is a challenge. This thesis presents a statistical analysis of various decision factors, their main effects and interaction effects on the performance of such flow lines by facilitating Dynamic Resource Allocation (DRA) and real-time resource sharing.;The effect of dynamic resource allocation is investigated by simulating a combination of three station selection rules (Last Station First, Remaining Work Load, and Shortest Processing Time) for resource allocation, three resource selection rules (Largest Quantity Available, Least Utilized Available, and Preferred Alternative Available) among alternative resources for stations, and a variety of quantity (2, 3, 4, 6, 8, and 10) of resource duplicates available in the flow line.;This study first shows that DRA greatly enhances system performance when compared against a typical flow line operated without DRA. Second, the station selection rules and varying quantity of duplicate resources have the greatest effect on system throughput, and manufacturing lead time. While, the station selection rules, resource selection rules and varying quantity of duplicate resources have the greatest effect on system throughput, manufacturing lead time, process wait time for resources and the resource utilization rate. Third, the proposed approach can be used as a system design tool to determine the number of resources necessary to maximize the system throughput without wasting resources. Forth, this study also demonstrates via simulation how DRA can be facilitated using Radio Frequency Identification (RFID) technology, which is used as an enabler to facilitate a look-ahead approach for dynamic resource allocation and provides additional benefits in terms of all performance measures.
机译:本文研究了站选择规则对资源分配的影响,站替代资源之间的资源选择规则以及制造流水线中可用的资源重复数量的影响,从它们对系统吞吐量,制造提前期,资源的影响利用率水平,以及处理资源等待时间。使用Arena(TM)模拟程序包对假设有十个工位的假想流线进行建模,并使用SASRTM统计分析软件通过方差分析(ANOVA)分析实验结果;类似于典型的维护,修理和大修(MRO)在生产流水线的类型上,模拟模型中的每个工位均由工序顺序备选方案以及每种工序的资源备选方案组成。资源代表操作所需的某些技术能力;它可以是操作员,也可以是一组工具,或者两者都可以。除了在操作的完成时间和资源的实际下落方面缺乏实时可见性之外,这种流线通常在有限数量的资源下运行。因此,有效地利用资源同时实现流水线的最大可能吞吐量是一个挑战。本文通过促进动态资源分配(DRA)和实时资源共享,对各种决策因素,它们的主要影响和相互作用对这种流水线性能的影响进行了统计分析。用于站点分配的三个站点选择规则(最后站点优先,剩余工作量和最短处理时间)的组合,站点的替代资源中的三个资源选择规则(可用的最大数量,使用最少的可用资源和首选的可用替代对象),以及流水线中可使用各种数量(2、3、4、6、8和10)的资源重复项;该研究首先表明,与不使用DRA的典型流水线相比,DRA大大提高了系统性能。其次,工位选择规则和重复资源的数量变化对系统吞吐量和制造提前期的影响最大。同时,站点选择规则,资源选择规则和变化数量的重复资源对系统吞吐量,制造提前期,资源的过程等待时间和资源利用率影响最大。第三,提出的方法可以用作系统设计工具,以确定在不浪费资源的情况下最大化系统吞吐量所需的资源数量。第四,本研究还通过仿真演示了如何使用射频识别(RFID)技术促进DRA,该技术被用作促成动态资源分配的前瞻性方法,并在所有性能指标方面提供了额外的好处。

著录项

  • 作者

    Tamma, Shilpa.;

  • 作者单位

    The University of Texas at San Antonio.;

  • 授予单位 The University of Texas at San Antonio.;
  • 学科 Industrial engineering.
  • 学位 M.S.
  • 年度 2009
  • 页码 116 p.
  • 总页数 116
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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