General service should be the highest cost of labor, if the service to special high-value facilities and equipment, then the bells and whistles.
such as high-end medical equipment, luxury hotels, luxury cars (chartered), luxury airplanes (chartered) and so on.
From another point of view, if it is the occurrence of service quality accidents, customer dissatisfaction, then the highest cost of quality.
Because bad service is generally difficult to undo, resulting in customer attrition, which is costly.