Most of these services must be available 24 hours a day. Thus managers make sure that people are hired to fill all work shifts. They also make sure that the equipment is working properly. Managers develop procedures and policies for running the services. They explain these policies to the people who supervise the workers.
Managers have many administrative duties.
They read reports of the services income and expenses. Each year they plan a budget. Some managers supervise the schedules for service. For example, at an airport the manager may check that all the flights have enough time on the ground. Managers frequently meet with supervisors and get progress reports.