Department responsible for the maintenance and proper operation of all machinery in the hotel, including steam plants, heating, refrigeration, air-conditioning, elevators, lighting, and other systems. Includes skilled craftspeople, such as carpenters, lock- smiths, painters, and plumbers. The department directs the work of subcontractors who are responsible for designated building systems such as elevators and implements a work order system to ensure that the hotel's guests are not inconvenienced by faulty equipment