Answer: idle production capacity
Step-by-step explanation:
Idle capacity refers to the remaining amount of capacity that is left in a company when both the productive and the protective capacity have been removed from consideration.
Since the plane has a capacity of 120 passengers but he has averaged only 24 passengers, a load factor of 20 percent. Once the plane takes off, the other 96 seats generate no sales and profits to the airline for that flight, then the unique aspect of services does this situation describe idle production capacity.