Abstract
In this study, the trend of fatigue feeling was researched and analyzed for different work postures. Some work postures are used for the same work purpose. Standing posture or chair sitting posture is common. Recently Multi-process holding system developed in Toyata production system was introduced more often. The system requires standing posture with several walk steps. The "Questionnaire for Subjective Fatigue Feeling", by Industrial Fatigue Research Committee of Japan Association of Industrial Health was used. This study focused on women as the objects of study. The task were sawing, fiber processing or assembling. The subjects for multi-process holding were nine newly employed women (who graduated from senior high school), the subjects for standing were 12 newly employed women, the subjects for chair-sitting were nine newly employed women, and there were seven women whose work posture changed from chair-sitting posture to multi-process holding. As the result of this study, in the case of newly employed women working in the standing posture with several walks steps and women whose work posture changed from chair-sitting posture to multi-process holding fatigue feeling increases at first, but it decreases immediately. Standing posture fatigue feeling becomes high and makes much difference among individuals when compared with other work postures. Daily change was significant, but weekly change was not significant. Chair sitting fatigue feeling was lower compared with other postures in the initial week but afterwards the possibility of fatigue feeling increased. These results offer an effective suggestion as fundamental materials for studying proper work postures in production systems.
