Stress, in psychology and biology, any environmental or physical pressure that elicits a response from an organism. In most cases, stress promotes survival because it forces organisms to adapt to rapidly changing environmental conditions. Adaptive stress is sometimes described as eustress. However, when an organism’s response to stress is inadequate or when the stress is too powerful, disease or death of an organism may result. Such maladaptive stress is sometimes referred to as distress.
VTS operators may suffer from acute, chronic, or traumatic stress caused by their workload and other working environmental factors. Workload is defined as the physical and/or mental requirements associated with task or combination of task. Workload refers to the operators have limited capacity that actually required to perform a particular task working environment factors, shiftwork especially night duty, workload, etc.
This study provides the fundamental information for understanding the VTS operators' occupational stress. Our future work is to analyse VTS operators' stress under widely variable for clarifying the relation of these assessment. the acceptable stress can be determined as the level of stress not to impede the operator to manage the system safely and effectively.
This study intended to measure the level of VTS operators’ stress and find out factors influencing it by understanding their characteristics during carrying out their task. For this purpose, analyzed the data collected through conducting surveys on VTS operators as the Korea Occupational Stress Scale(KOSS) and Psychological Well-being Index (PWI). As s results, VTS operators are experiencing higher level of psychological stress than the national average. And the factors to cause VTS operators' occupational stress can be summarized as follows this situation tends to the operator has stress. And, if the last situation ordinary continues, occupational stress will occur automatically and it makes the operator has not satisfied their job. That's why it is the interaction between the operator and assigned task. Furthermore, these workload include the operators' mind stress and their decision under these circumstances. The objective is to determine the level of VTS operators' mind stress that might trigger any human error based on their mental workload during their task.
Workload is classified as physical workload and mental workload. Physical workload is the measurable portion of physical resources expended when performing a given task. Mental workload is defined as the level of processing capacity while performing the task or the difference between the capacity to affect the usable real performance and human-information processing system. The common idea for mental workload is directly proportional with the difference between existing sources and required sources by the task.
Under these explanations, we can consider three kind of loading for performing a task. Firstly, the operator capacity is over to the required performance. This situation tends to the operator bored and then also tends to make mistakes. Secondly, the capacity is equal to the required performance that is the best fitting of the employment not only for human resources but also for the efficient performance of the task. Finally, when the operator capacity is not enough to perform a task due to overlapping task items