The Effect of Work Posture on Work Fatigue in the Metal Moulding Department of XYZ Company

Abstract

One of the things that can cause a work accident is manual material handling (MMH). Manual material handling activities are still often found in modern industries because MMH activities are easy to apply, cheap, and very flexible to do. The poor manual activity of material handling can lead to musculoskeletal complaints, spinal cord injuries, and work fatigue. If the worker does his job with a work posture that is not ergonomic then the worker will be vulnerable to work fatigue. Work posture problems and work fatigue are also experienced in XYZ Company which is one of the companies engaged in the metal casting industry. Therefore, the study aimed to examine the effect of work posture on the level of work fatigue in the metal moulding department of XYZ Company using NBM questionnaires, SOFI questionnaires, and REBA methods. The results showed that the segment of the body most felt pain by the operator was the left leg. Wherefrom the results of identification of working posture there is one operator who gets a REBA score of 10 and three operators who get a REBA score of 12. Then, the level of work fatigue from the four operators, namely, amounted to 3.46; 3.21; 2.7; and 3.02. The four values have a value that is in the SOFI score range of 1.13-4.87 which means all four operators experience moderate work fatigue. Then a regression test was conducted to determine the effect of both variables and obtained a correlation coefficient (r) value of 0.754; and a coefficient of determination (R Square) of 0.569. These values show the effect of work posture on work fatigue has a strong relationship and an effect of 56.9%.