Mental Workload Analysis of Liquid and Solid Division Employees at PT Sanbe Farma Using NASA-TLX

Abstract

This study aims to analyze the mental workload of employees in the Liquid and Solid Production Divisions at PT Sanbe Farma Unit I using the NASA-Task Load Index (NASA-TLX) method. High mental workload can affect performance, productivity, and work safety, particularly in production processes that are not yet fully integrated. The research involved 30 respondents (16 employees from the Liquid Division and 14 from the Solid Division) through questionnaires covering six mental workload indicators: mental demand, physical demand, temporal demand, own performance, effort, and frustration level. Data were analyzed through weighting, rating, product value calculation, and weighted workload (WWL) computation. The results showed that most employees experienced high to very high workload levels, with NASA-TLX scores ranging from 54.67 to 96.00. The highest average score was found in the own performance indicator, followed by mental demand and temporal demand. The main factors contributing to the high mental workload included tight production targets, manual recording processes, heavy physical tasks, and the lack of integrated systems between departments. Recommendations include increasing rest periods and improving work systems to reduce employees’ mental workload.