Abstract
The company mentions the frequent inaccuracies between coal unloading data on barges with coal availability in coal silos and stockpiles carried out by Coal handling Control Room (CHCR) operators. Moreover, unloading coal on barges by Ship Unloader (SU) operators took a longer time than the specified estimated time. Therefore, this study aims to investigate whether the physical workloads of CHCR and SU operators are heavy and cause fatigue, which eventually causes a number of problems that lead to company losses, or whether the cause of these problems is not in operator's physical workload. This study involved 16 CHCR and SU operators with 3 work shifts. Physical workload measurement is referred on operator's pulse and temperature. Pulse measurement is manually done to both working and resting operators. Meanwhile, body temperature measurement is done before, when, and after working by using digital thermometer. Cardiovascular Load (CVL) approach is used to check pulses, to find out whether the workload is considered as heavy or light, while body temperature is referred to indicators or normal temperature range. The results of pulse measurements were processed and analyzed using the Cardiovascular Load (CVL) approach. Then, body temperature measurement is carried out to the operator’s before work, during work, and after work using a thermometer. The results show that the physical workload of CHCR and SU operators are classified as light and do not potentially lead them to work fatigue. In other words, the source of company's problems is not from physical workloads of CHCR and SU operator but likely from other aspects. Keywords: body temperature, cardiovascular load, operator, physical workload, pulse rate
Highlights
The depiction of a corporation system is economically valuable and can be used in form of finished product which going through a series of transformational processes driven by human as the designer as well as the driving force in either internal or external activities
The aim of this study is to find out whether the workload of Coal handling Control Room (CHCR) and Ship Unloader (SU)’s operators is considered physically heavy which leading to work fatigue symptoms and caused a number of problems that resulted in company losses, or in the contrary, whether the workload is light and does not cause fatigue to operators
We could see from the average pulse of working operator was at 86.44% or less than 100%, meant that the workload experienced by the operator could be categorized as light (Christensen and Christensen, 1991)
Summary
The depiction of a corporation system is economically valuable and can be used in form of finished product which going through a series of transformational processes driven by human as the designer as well as the driving force in either internal or external activities. The success of a corporation system highly depends on the composition subsystem which interacted each other and show a good performance (Rusnock and Borghetti, 2018). Human cannot avoid the subsystem as the composition of the system itself, because human is the important factor in the success of a company system performance (Jex, 1998; LePine et al 2005; Kahya, 2007; Balfe et al 2015; Rusnock and Borghetti, 2018). In the context of manufacturing company, repetition activities are inevitable, and human is the one who run the task. The potential of error might arises and affects the safety of operator and working environments (Bommer and Fendley, 2018). The potential for errors will be greater if the operator is not thorough in their work, or when their workload is excessive
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