I use to work for a cleaning company. Cleaning private houses apartments from top to bottom cleaning ceilings, walls,windows working our way through household. Depending on what type of cleanse the clients wanted. Then our manager would go round inspecting with the white gloves to make sure no where was missed. I have also worked in hotels sorting the rooms with the timer against the clock. Each pair had 15 minutes to do each room as there were amounts of rooms between floors we had to do through out the our shifts