William A.V. Cecil owns the largest private home in America, the Biltmore mansion in Asheville, North Carolina. He used to go to the estate every day to make sure every detail was done right. When he left one area, employees would get on their two-way radios and warn people in the next area he was coming so they could be at their best.
Didn't Jesus tell some stories that make the same point? It is best always to be ready when the king or master returns.