Heuristic procedure for the assembly line balancing problem with postural load smoothness

Chorkaew Jaturanonda, Suebsak Nanthavanij, Sanchoy K. Das

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


This paper presents a heuristic procedure for assigning assembly tasks to workstations where both productivity and ergonomics issues are considered concurrently. The procedure uses Kilbridge and Wester’s algorithm to obtain an initial task-workstation assignment solution which minimizes the balance delay of an assembly line. A task reassignment algorithm was applied to improve the initial solution by exchanging assembly tasks, which smooth postural load among workers, between workstations. A composite index of variation was used to measure the effectiveness of the task-workstation assignment solution. On the basis of clothes assembling, it was found that the task-workstation assignment solution with a minimum composite index of variation can be obtained with relatively equal weights in balance delay and postural load.

Original languageEnglish (US)
Pages (from-to)531-541
Number of pages11
JournalInternational Journal of Occupational Safety and Ergonomics
Issue number4
StatePublished - Jan 2013

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Safety Research
  • Public Health, Environmental and Occupational Health


  • Assembly line balancing
  • Postural load smoothness
  • RULA
  • Upper extremities disorders


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