CONWIP based control of a lamp assembly production line

W. H. Ip, Min Huang, Kai Leung Yung, Dingwei Wang, Xingwei Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)


Efficient and effective production control systems are very important for manufacturing plants. CONWIP, one of these production control systems, has a high potential of becoming the best one available because it suits a variety of production environments and is easy to implement. In the following paper, we compare the single-loop and multi-loop CONWIP production control systems for an actual lamp assembly production line producing different kinds of products with discrete distribution processing time and demand. A model is formulated with respect to total cost and service level. A novel rule-based genetic algorithm (GA) approach is proposed for the multi-loop CONWIP system to find the optimum parameter setting. The results have shown that the single-loop CONWIP production control system is more efficient than the multi-loop system. It can greatly decrease the total cost and the WIP (Work-In-Process) with zero shortage probability.
Original languageEnglish
Pages (from-to)261-271
Number of pages11
JournalJournal of Intelligent Manufacturing
Issue number2
Publication statusPublished - 1 Apr 2007


  • Genetic algorithm
  • Multi-loop CONWIP
  • Production control system
  • Simulation
  • Single-loop CONWIP

ASJC Scopus subject areas

  • Software
  • Industrial and Manufacturing Engineering
  • Artificial Intelligence


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