The correct answer is A. fatigue study.
A fatigue study is a type of work study that examines the effects of fatigue on worker productivity. It is used to determine the optimal amount of rest and breaks that workers need to take in order to avoid fatigue and maintain a high level of productivity.
A time study is a type of work study that measures the amount of time it takes to perform a task. It is used to determine the most efficient way to perform a task and to set standards for worker productivity.
A motion study is a type of work study that analyzes the movements that workers make when performing a task. It is used to identify and eliminate unnecessary movements and to improve the efficiency of work methods.
A work study is a general term for any type of study that examines the way work is performed. It can include fatigue studies, time studies, motion studies, and other types of studies.
Fatigue is a state of physical or mental exhaustion. It can be caused by a number of factors, including overwork, lack of sleep, and poor nutrition. Fatigue can lead to a decrease in productivity, an increase in errors, and an increased risk of accidents.
Rest periods are periods of time during which workers are allowed to rest and recover from fatigue. Rest periods can be scheduled or unscheduled. Scheduled rest periods are typically scheduled into the workday at regular intervals. Unscheduled rest periods are taken as needed by the worker.
The optimal amount of rest and breaks that workers need to take in order to avoid fatigue and maintain a high level of productivity varies depending on a number of factors, including the type of work being performed, the level of physical and mental exertion required, and the individual worker’s tolerance for fatigue.