A calculator that is used to determine how many 50-pound boxes a delivery driver can safely lift per 8 hours of work is MOST concerned with ergonomics.
Ergonomics is the scientific study of human factors in relation to their work environment. The use of such a calculator indicates a concern for the physical well-being of the delivery driver and a focus on designing work environments and tasks that are safe and comfortable for workers to perform. By taking into account the weight of the boxes, the duration of the work shift, and other factors related to the driver's physical capabilities, the calculator helps to minimize the risk of injury, fatigue, or strain on the driver's body. Overall, the use of an ergonomics calculator helps to promote safe and healthy working conditions for delivery drivers.