การปรับปรุงงานเพื่อลดความเมื่อยล้าและความเสี่ยงจากท่าทางการทำงาน: กรณีศึกษาพนักงานในกระบวนการประกอบข้อต่อ

Abstract

This cross sectional study aimed to study subjective muscle fatigue and the risk of working posture by using RULA technique. The study employed 60 workers who work with prolonged sitting at an assembly connector process. Correlation between subjective muscle fatigue and RULA scores was analyzed. Results of the study could be used as guidelines for preventing and controlling of awkward working postures in order to reduce risk of illness and accidents in the workplace. The highest fatigue score was found in right shoulder at 1.65±1.01 points in level 3 of muscle fatigue. The average RULA score was 3.73+0.58 points in level 2 of the risk of working posture. The correlation between subjective muscle fatigue and RULA scores analyzed by Spearman rank correlation coefficient was found to be significant (p<0.05) in the neck region. Working postures with the highest risk score were selected to undergo working condition improvement. RULA score reduced from 7 to 3, and employees felt satisfied and more productivity.