การเปรียบเทียบความเสี่ยงทางการยศาสตร์และความเหนื่อยล้าในการปรับปรุงการทำงานของพนักงานโรงงานผลิตยางแผ่นรมควัน

This study aimed to compare ergonomic risk and fatigue before and after work improvement among workers in a rubber smoked sheet factory. The sample consisted of three workers. Ergonomic risk was assessed using the Rapid Upper Limb Assessment (RULA) and the Rapid Entire Body Assessment (REBA), while fatigue was evaluated using a standardized fatigue questionnaire. The results showed that the mean RULA score decreased from 10.00 to 7.00, and the mean REBA score decreased from 13.00 to 6.67 after the ergonomic work improvement, indicating reduced levels of ergonomic risk. In addition, the mean fatigue score decreased from 6.32 to 4.80. Paired t-tests revealed that the RULA and REBA scores before and after the work improvement were significantly different at the 0.05 level. Similarly, the fatigue subscales, namely fatigue characteristics, perceived vigor, and overall feeling, also showed statistically significant differences at the 0.05 level. These findings indicate that ergonomic work improvement in rubber smoked sheet processing can reduce both ergonomic risk and work-related fatigue among workers. Future studies should include records of injuries in specific body regions, accidents, and absenteeism with their causes to support more comprehensive data analysis and application of the findings to improve work efficiency.