Mental workload analysis using NASA-TLX method between various level of work in plastic injection division of manufacturing company

Abstract

This work presents the mental workload analysis within the manufacturing industry that produced automotive product. The productivity of company dropped to 77, 13 % from January to March 2015 while product defects and absenteeism increased from 1.63 to 3.49 %. This paper aimed to measure the mental workload based on job position and the shift work. The method that used is NASA-TLX, which involved 48 employees. The result shown that the highest mental workload (MWL) was in night shift with MWL score 71.9, and iindicator of temporal demand on the morning shift by 18.2. Whereas the post of leader has the highest score which is 70.2. Because the mental workload is high, the researchers proposed to conduct relaxation training, where most of employees stated that their body and mind become fresh and willingly to continuously apply the relaxation training.