Own Performance Research Articles

Analysis of Mental Workload in Sugar Factory Production Workers Using the NASA-TLX Method

Company XYZ is a sugar manufacturing company where it has several processing sequence including milling until crystallization. Methods used in this research are NASA-TLX in order to measure mental workload of employees caused by a severe work environment such as dust and gas exposure, and a not optimum temperature. The findings shed a light on the significant of Own Performance (OP) among the others parameter of NASA-TLX. Showing that the main component of workers’ stress are coming from the performance itself with 534.333 index of OP. With the laboratory works at the company makes the top compared to the other jobs. This study shows company XYZ to improve in certain aspects. This will help improvements to be on target.

BEBAN KERJA PSIKOLOGIS DAN FISIK DENGAN NASA-TLX DAN CARDIOVASCULAR LOAD (CVL)

The unsafe behavior of workers causing work injuries and accidents is an important concern of the world so it is embraced by psychological and physical work measurements. The study aims to analyze the psychological and physical workload of employees in the quality control (QC) division, psychological workload measured by the National Aeronautics and Space Administration Task Load Index (NASA-TLX) method, and physical workload based on the percentage of Cardiovascular Load (% CVL) of 15 employees in the QC division. The research step was carried out by measuring psychological workload based on 5 aspects, namely: Psychological demand (MD), Physical Demand (PD), Own Performance (OP), Effort (EF) and Frustration Level (FR), weighting, rating and calculating the Weighted Workload (WWL) Value, determining the average WWL and interpretation based on the physical workload score value with CVL. Physical workload measurement is carried out by calculating the maximum pulse rate based on the pulse rate at work (DNK) and pulse rate at rest (DNI) to determine the percentage value of CVL. The results of the psychological workload score study using the NASA-TLX method, that 2 employees (13.33%) were in a low category while 11 employees (73.33%) were in the medium category, and 2 employees (13.33%) in the high category, proposed improvements with the addition of employees to reduce the psychological workload. The physical workload score value using the CVL method is less than 30% so the physical workload of employees is categorized as "No Fatigue" so that there is no improvement to reduce the physical workload or quality control division employees do not experience physical workload. The scale of the data with a larger population is recommended to be tested in future studies.

Workload Identification Using the National Aeronautics and Space Administration Task Load Index (NASA-TLX) Method of Rolling Mill Operators in the Production Department at PT Jaya Pari Steel Surabaya

This study aims to determine the level of the workload of rolling-mill operators in the production department at PT Jaya Pari Steel. The study includes four steps: surveying, making questionnaires, distributing questionnaires, and data processing. The main problem faced by the company is the high workload that must be carried out by the operators so that the measurement of workload, in this case, using the NASA-TLX method, is required. The criteria emphasized in measuring workload covers six indicators: Mental Demand (MD), Physical Demand (PD), Temporal Demand (TD), Effort (EF), Own Performance (OP), and Frustration (FL). This study involved 168 respondents and found that the value of an indicator of physical need (PD) has an average value that is greater than other indicators. The results showed that: 1) seven operators felt the workload with a very high level in the range 80-100 while 11 other operators felt the workload with a high level in the range of 50-79, 2) the working environment conditions at PT Jaya Pari Steel needed to be improved to elevate the operator performance. The unsupportive working environment, such as weather, room temperature, noise, and lack of lighting and ineffective shifting of work systems are factors in the high workload of rolling mill operators.

Subjective responses of mental workload during real time driving: A pilot field study

This study evaluated drivers’ mental workload in real time driving to identify the driving situation’s complexity influences in an attempt to further design on a complete experimental study. Three driving settings were prepared: Session A (simple situation); Session B (moderately complex situation); Session C (very complex situation). To determine the mental workload, the NASA-Task Load Index (TLX) was administered to four drivers after each experimental driving session. The results showed that the Own Performance (OP) was the highest for session A (highway), while Physical Demand (PD) recorded the highest mean workload score across the session B (rural road) and C (city road). Based on the overall results of the study, it can be concluded that the highway is less demanding compared to rural and city road. It can be highlighted in this study that in the rural and city road driving situation, the timing must be set correctly to assure the relevant traffic density. Thus, the sensitivity of the timing must be considered in the future experiment. A larger number of experience drivers must be used in evaluating the driving situations to provide results that can be used to draw more realistic experiments and conclusions.