I have gone back and researched what a "Hausdame" actually does. Based on the entry on hotel careers (see below), the "Etagen-Hausdame" is responsible for the cleanliness and smooth operations on her floor. Depending on the hotel, this position is identical to that of the "assistant housekeeper". Another term used in English is the "floor supervisor". I can also imagine that depending on what type of hotel and its size, a floor supervisor could be responsible for more than one floor. The floor supervisor reports to the "Hausdame" = the head of housekeeping = head of department role. And I would be very surprised if there weren't any regional differences.
(Als Etagen-Hausdame ist man, wie der Name schon sagt, für die Sauberkeit und die reibungslosen Abläufe auf "seiner Etage" verantwortlich. Diese Position ist, je nach Hotel mit der des Assistant Housekeeper identisch. Eine weitere Bezeichnung im englischen ist ggf. "floor supervisor").
http://www.hotelcareer.de/stellenbeschreibungen/etagen-hausd...