What is a schedule built by the company that shows reserve availability periods for flight attendants?

A reserve line refers to a schedule created by the company specifically for flight attendants who are on reserve status. These individuals are not assigned to a specific flight schedule but are available to be called in for duty as needed. The reserve line provides detailed information about the periods during which these flight attendants are available to cover flights, ensuring that staffing needs are met while also allowing for flexibility.

This option is particularly important as it helps manage the operational requirements of the airline, ensuring that there are always qualified personnel ready to respond to last-minute changes or staffing shortages. The other choices, while related to flight schedules and duty assignments, do not specifically denote the concept of a schedule that outlines reserve availability for flight attendants.