An open shift is a shift that is scheduled for a job but without an employee assigned to work it. Open shifts help managers to identify shifts that are either not yet or are no longer scheduled for a specific employee to work. They serve as placeholders until an employee is assigned. An example of an open shift is when an employee who was scheduled to work the Day shift next Monday takes an approved vacation day instead. The solution creates an open shift in the schedule when the time off is approved to remind the manager to find a replacement to work the shift.