This is not new, search for "MM1 queue" and you will get a lot of mathemathical ...

		santimt on Dec 8, 2011 \| parent \| context \| favorite \| on: A single line to 3 cashiers is ~3x faster than a s... This is not new, search for "MM1 queue" and you will get a lot of mathemathical results explaining why this effect happens. Is a study case of queueing models.