What do you do about employees who sneak out early? Some employees just help themselves to a little free time. Others might have obligations after work that leave them pressed for time.
Talk through with them the after-work schedule so they can push back any obligations to a time that does not require them to leave early. Talk through the need to stay until the end of their scheduled work obligations. Spell it out. Break it down. Follow up. One technique is to schedule some concrete to-do items for the employee during the last hour of work in order to help them stay focused up to the last minute.