Why the other line is likely to move faster - Bill Hammack

http://www.youtube.com/watch?v=F5Ri_HhziI0

engineerguyvideo
Bill reveals how "queueing theory" - developed by engineers to route phone calls - can be used to find the most efficient arrangement of cashiers and check out lines. He reports on the work of Agner Erlang, a Danish engineer who, at the opening of the 20th century, helped the Copenhagen Telephone Company provide the best level of service at the lowest price.