A facility manager is the person responsible for coordinating all the employees and entities involved in the facility to ensure that they work on behalf of the facility and help meet its short- and long-term goals and objectives. Many people are in fact facility managers in their daily lives and do not realize it. The person who is the head of a household is really a facility manager. That person needs to purchase the house, pay the mortgage, paint the rooms, install new equipment such as air conditioners, maintain existing systems such as the roof, manage facility "subletting" (as in determining who is going to get which room), interact with government entities to pay taxes, and employ tradespeople such as plumbers and electricians.
Hope this helps.