On-call
SEGMENT OF TIME IN WHICH A WORKER IS EXPECTED TO BE AVAILABLE AT SHORT NOTICE TO PERFORM UNPREDICTABLE WORK, OR THE STATUS OF SUCH A WORKER
On call shift; On call
On-call scheduling, sometimes referred to as on-call shifts, are processes used in business where employee work schedules are intentionally unpredictable. Employees who work on-call are expected to be available at any time during their shift, usually with short notice, to carry out their working duties.