Fuzzy operator allocation for balance control of assembly lines in apparel manufacturing

Chi Leung Hui, Chun Chung Chan, K. W. Yeung, Frency Sau Fun Ng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)


Production processes in apparel manufacturing typically involve hybrid assembly lines. In order to perform at predetermined production rates, careful balance control of the sewing operations on these assembly lines is very important. The right number of operators to be moved in and out of a sewing section has to be accurately determined. In this note, we extend the literature on fuzzy logic applications to control systems by proposing a simple, yet effective, rule-based system that captures the knowledge of experienced supervisors in a set of fuzzy rules. These rules specify how balance control can be achieved based on the level of difference between 1) the actual and target buffer level and 2) the actual and target section performance. Since these parameters are normally expressed in linguistic terms, they are encoded in rules expressed with fuzzy logic. The number of operators to be moved in and out of a sewing section can, therefore, be determined by means of fuzzy inferences. To evaluate the effectiveness of the system, we compared its performance to the decisions made by experienced supervisors at a large shirt factory. The system was found to increase in production efficiency by 30%.
Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalIEEE Transactions on Engineering Management
Issue number2
Publication statusPublished - 1 May 2002


  • Apparel manufacturing
  • Balance control
  • Fuzzy logic
  • Hybrid assembly line
  • Process management

ASJC Scopus subject areas

  • Strategy and Management
  • Electrical and Electronic Engineering

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