Operational capacity allocation for unreliable module-based assembly systems

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Liming Liu
  • Xue-Ming Yuan
  • John J. Liu

Detail(s)

Original languageEnglish
Pages (from-to)134-153
Journal / PublicationEuropean Journal of Operational Research
Volume155
Issue number1
Publication statusPublished - 16 May 2004
Externally publishedYes

Abstract

This paper discusses the operational capacity allocation (OCA) problem in an unreliable module-based assembly (MOBA) system. MOBA systems stem from pervasive applications of agile manufacturing. A MOBA system consists of a number of assembly stations in series, each of which is fed by a sub-fabrication line. Each assembly station performs one assembly operation which requires one workpiece pulled from the upper stream station and one module supplied from its sub-fabrication line. The inter-station buffers are small. The assembly stations are subject to random breakdowns and repairs. OCA for throughput maximization is a key issue in the design and operation of a MOBA system. We develop a set of rules for allocating a finite amount of operational capacity of the production system so that its throughput is maximized. Simulation results show that this policy is robust and applicable to systems with more than three stages and with general processing times. Through numerical experiments, we discuss the impacts of the system parameters on the optimal allocation policy. We then propose the concept of soft and rigid throughput bottlenecks and explore criteria for identifying the soft throughput bottleneck of a system. We believe our work provides a basis for a promising approach for OCA in complex and unreliable assembly systems. © 2003 Published by Elsevier B.V.

Research Area(s)

  • Λ -policy, Assembly systems, Blocking and starvation, Breakdowns, Capacity allocation, Effective assembly times, Soft and rigid throughput bottlenecks, Sub-lines

Citation Format(s)

Operational capacity allocation for unreliable module-based assembly systems. / Liu, Liming; Yuan, Xue-Ming; Liu, John J.
In: European Journal of Operational Research, Vol. 155, No. 1, 16.05.2004, p. 134-153.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review