• 대한인간공학회지
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• 제31권1호
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• pp.185-189
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• 2012

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.

• 한국화재소방학회논문지
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• 제28권4호
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• pp.81-88
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• 2014

본 연구는 119구급대원의 근골격계 증상 호소율을 파악하고 증상 유소견자들에 대한 작업성 근골격계질환(WMSDs)을 유발하는 환자운반 작업에 대한 인간공학적 평가를 통해 작업 위험도를 파악하고자 하였다. 이를 위해 근골격계 유해요인 조사지침(KOSHA Code H-30-2008)을 활용한 설문도구를 이용하여 근골격계 증상 호소율을 파악하였으며, 환자운반 작업의 위험도는 인간공학적 평가도구인 OWAS, RULA, REBA를 이용하여 평가하였다. 연구결과 근골격계 증상 유경험자는 60.9%였으며 허리 부위의 증상 자각율(36.1%)이 가장 높았고 WMSDs을 유발하는 가장 큰 원인은 환자운반 작업(48.4%)이었다. 환자운반 작업의 인간공학적 위험도 평가 결과 주 들것을 구급차에 싣고 내리기, 들 것 장비를 이용하여 환자를 들어올리는 작업에서 OWAS는 3단계, RULA와 REBA는 3~4단계 수준이었고, 응급용들것으로 계단 이송, 척추고정판으로 차량내 환자 이동, 업거나 안고 계단이나 경사로를 이동하는 작업에서 OWAS, RULA, REBA 모두 3~4단계로 작업자세의 개선이 필요한 것으로 평가되어 119구급대원의 WMSDs 예방을 위해서는 즉각적인 작업자세의 개선이 요구된다.

• 대한인간공학회지
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• 제26권2호
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• pp.45-59
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• 2007

The operating tasks of overhead crane have caused undue stress to the operators from physical, mental, and environmental workload. Existing workload assessment models for musculoskeletal disorders such as OWAS, RULA, and QEC have limited applicability to the crane operating tasks because they focus mainly on physical factors and do not consider the relative importance of each factor. The present study was to develop a workload assessment model customized to overhead crane operation, following a systematic process: (1) analyzing task characteristics, (2) selecting workload factors, (3) developing assessment methods, (4) establishing action levels, and (5) computerizing the assessment model. Based on literature review, worksite survey, and focus group interview, 4 physical factors (awkward posture, static posture, repetitive motion, and excessive force), 6 mental factors (visual demand, auditory demand, task complexity and difficulty, time urgency, work schedule related stress, and safety related stress), and 4 environmental factors (noise, vibration, dust, and temperature) were selected and their rating scales and relative weights were determined. Then, based on the workload assessment results of 8 overhead cranes operated at different workplaces, the action levels of each factor category were established. Finally, the crane operation assessment model was computerized for effective analysis and report preparation. The present approach is applicable to develop a customized workload assessment model for an operating task under consideration.