For a lot of years now, shift work has been a theme of substantial research interest. This fact is supported by the thousands of academic articles published about the topic. Even though many authors in the field of shift work define shift work as work that occurs outside traditional diurnal working hours. This research relies on a traditional definition of shift work as work that is performed outside the traditional daytime hours, with an emphasis on the timing of work, and is inclusive of several shift work variations (Moen, 1989). This is because, some employees may be scheduled to work nights or evenings on a permanent basis. The most common shift schedule is the rotating shift schedule in which employees switch between days, evenings, and/or nights at specific intervals (i.e., daily, weekly, etc.). Alternatively, some employees may work nights occasionally and not as a regular requirement of their work schedule.