Improving The Work Position of Worker's Based on Quick Exposure Check Method to Reduce the Risk of Work Related Musculoskeletal Disorders

摘要

The manufacturing process of brick and well rings were conducted by workers who must bend down, sit, and stand to do the job. This body positions occur repeatedly, so it can cause muscular and back bone injury. This monotonous and repetitive work, plus unergonomic working tools can cause Work Related Musculoskeletal Disorders (WMSDs) to workers, and will have impact to work productivity. Because of that, analysis was conducted to assess work risk relating to worker muscular disorder in the work place by using Quick Exposure Check (QEC) to every task elements, and working position that have potential to cause WMSDs. QEC assess damage to the back, shoulder, wrist, and neck. Research results shows that parts of manufacturing process of brick and well rings that have potentials to cause WMSDs are material mixture and the bucket filling, with exposure level of 73.8% and 71.5%. Other activity elements need further investigation and change soon with exposure level of 54.5-67%, and another elements need investigate and change immediately action with exposure level of 41.9% - 49,3%. Working risk emerge because of worker's back and neck bend while working and wrist rotate while lifting load. Position improvements were conducted by making new design of working tools such as cement mixing container, brick making table, shovel, and brick plate. Therefore perform the design of the stirring bath aids, materials and work desk operators to minimize the risk of WMSDs using anthropometric data. Once the design is done, the exposure value decreased to 48.8% and 47,7 %.