Nvestigation of musculesketetal discomfort and ergonomicrisk factors for non-desktop computer user

• Main Authors: Yi Li, 李易
• Other Authors: Swei-Pi Wu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/12734554301212833346

碩士 === 華梵大學 === 工業工程與經營資訊學系碩士班 === 102 === With the advent of the information era, non-desktop computers (notebook computers and tablet computers) have become increasingly prevalent, leading to increased musculoskeletal injuries. In order to reduce adverse effects on nondesktop computer users, an NMQ questionnaire survey was conducted targeting notebook computer and tablet computer users in order to gain an insight into musculoskeletal discomfort. In addition, RULA was adopted to verify the users’ work postures and risk levels. Finally, cross analysis was conducted on body part discomfort obtained from the NMQ questionnaire survey and the scoring classes in the RULA checklist in order to confirm the risk factors of different types of computers. As for the NMQ questionnaire survey, 300 respondents (150 were notebook computer users; 150 tablet computer users) took the survey. Findings show that body part discomfort had the prevalence rate of 55.3% (notebook computers accounting for 48.7% and tablet computers accounting for 66%). Among the body part discomfort rates for notebook computers, eyes, neck, right shoulder, left shoulder, and upper back accounted for higher ratios; as for tablet computers, the neck, eyes, right shoulder, left shoulder, upper back, and right wrist accounted for higher ratios. In addition, the body part discomfort ratios for tablet computers were higher than those of notebook computers. For work posture analysis using RULA, a total of 30 respondents (15 notebook computer users; 15 tablet computer users) took the survey. RULA was adopted for individual analysis. Results show that those with RULA scores of higher than 2 points and needed investigation and correction or quick improvement reached 93%; those whose scores were between 3-4 points and needed investigation and correction accounted for 60%; those with scores of between 5-6 points using RULA and needed quick improvement accounted for 26%; those scored 7 points using RULA and needed immediate improvement accounted for 7%. Finally, through the cross confirmation using NMQ and URLA, it was found that the risk factors of notebook computers are: excessive table height, without wireless keyboard, without elbow support, without appropriate seat adjustment, without foot rest, without two-hand support design, lacking foot rest and excessive frequency of use. Overall, non-desktop computer-induced musculoskeletal discomfort is attributed to: improper workplace design, poor posture, improper workstation configuration, repetitive operation, etc. Keywords: notebook computers, tablet computers, NMQ, RULA, musculoskeletal discomfort, risk factor