Scheduling hourly staff is a difficult balancing act for managers. On the one hand, you have to preserve margins by keeping the schedule lean and assigning only as many people as you need to meet customer demand. That means you sometimes need the flexibility to change the schedule in the days leading up to a shift. On the other hand, employees need flexibility too. Last minute scheduling changes make it harder for them to meet family obligations, work a second job, make it to class, or manage other aspects of their daily lives. But a reasonable shift swap policy can enable managers to meet the needs of both their business and their employees.