Workers in plastic manufacturing facilities are exposed to repetitive tasks and awkward postures due to massive production. This research aims to evaluate ergonomic risk factors in a factory for plastic household cleaning tools. Focusing on the drilling and tufting brush machine as a real case study. Using the Jack Siemens ergonomic simulation and questionnaires, the study found workers experienced pain in their lower back, wrist, and right arm with a significant level of joint angles in the upper limbs and prolonged standing. Furthermore, the workstation layout was redesigned to include human factors, resulting in substantial ergonomic improvements: a 38% decrease in compression force, a 45% reduction in standing time with a 45% increase in sitting time, and an 8% decrease in the time spent at significant and moderate joint angle levels. This reduction signifies substantial improvements in the ergonomic aspects of the workstation.
Nasser et al. (Thu,) studied this question.