Ergonomics Risk-Assessment Methods in Shipbuilding: Application of OWAS Considering Work load and Frequency for Risk Factor Analysis of WMSDs

  • Lee, Jun-Youb (Industrial-Hygiene Manager, Gunsan HSE Department, Hyundai Heavy Industries Co.Ltd.) ;
  • Seo, Hyun-Soo (Industrial-Hygiene Manager, HSE Department, Hyundai Heavy Industries Co.Ltd.)
  • Received : 2011.12.22
  • Accepted : 2012.01.16
  • Published : 2012.02.29


Objective: The aim of this paper is to introduces Hyundai Heavy Industry's ergonomic risk assessment tool, H-OWAS, which is considering work load and frequency compared to the OWAS. Background: As prevalence of work-related musculoskeletal disorders(WMSDs) in ship building industries has been much higher than that in other industries, most of the large scaled corporations have implemented their own prevention program since legislation on the prevention of WMSDs had introduced in 2003. Method: This paper introduces WMSDs prevention program, HEMP(HHI Ergonomics Management Program) which consists of risk assessment, improvement efforts of working environments, medical treatment and training/evaluation and describes how to operate the program. We also describe application of OWAS method considering work load and frequency for risk factor analysis(H-OWAS) and shows methodology for assessing the ergonomic risk factor. And comparison of the assessment results between OWAS and H-OWAS is carried out by statistical analysis. Result: There was statistically significant difference in the assessment results between OWAS and H-OWAS, and regression shows H-OWAS explains the borg's scale of perceived exertion more clearly than OWAS. Conclusion: H-OWAS has been proved more effective tool than OWAS to evaluate ergonomic risk factor under real working condition. Application: H-OWAS can be widely applied to the many other companies when implementing the ergonomics risk assessment.



  1. Borg, G. "Psychophysical bases of perceived exertion", Medicine and Science in Sports and Exercise, 14(5), pp.377-381, 1982.
  2. Kim, C. H. and Fernandez, J. E., "Psychophysical frequency for a drilling task", International Journal of Industrial Ergonomics, 12, pp. 209 -218, 1993.
  3. Lee, J. Y., "A Study of workload change at varying working posture, work/rest ratio and task type in an automobile assembly task", Journal of the Society of Korea Industrial and Systems Engineering, Vol. 24, No. 69, 2001.
  4. Lee, J. Y. and Seo, H, S., "The Method of the risk assessment on ergonomics in large-scale corporations", Spring Conference of Ergonomics Society of Korea, 2007.