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Title: Why the other line is likely to move faster

Added: Dec 20, 2010

Author: engineerguyvideo

Duration: 3:43

Description:
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.

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Channel: Tech

Tags: bill hammack  queues  queueing theory  queuing  lines  waiting  shopping  engineering  university of illinois u 



bill hammack  queues  queueing theory  queuing  lines  waiting  shopping  engineering  university of illinois u 

Youtube Comments: 394

Matrix29bear Says:

Nov 23, 2011 - On the other hand, if you have clumps of elderly folks or Welfare Queens, then you get all 3 cashiers blocked with slow moronic check writers, or granny puttering through her purse for that last exact penny. Otherwise you are not factoring in the "Humans are not machines" aspect. Cashiers get tired (lifting to scan over a thousand items heavy & small per hour is calorie taxing), bored, distracted, need their change & small bills restocked. With this queuing the cashiers are working non-stop.

Matrix29bear Says:

Nov 23, 2011 - There are other obvious factors in play. Blacks line-jump constantly (part ego, part ignorance, & part genetic-assholery) so they will constantly be starting fights in this system. What if you need to jump out of line to get something, well now you're wedged into a cattle line (sometimes with brass bumpers). What of the elderly (whom don't handle well the standing for long periods), well in a brass bumper line, they have to steer heavy carts in tight turns. It's all great if we were robots.

Matrix29bear Says:

Nov 23, 2011 - I also agree with a previous comment here in that this method, although okay for banks, does not work at supermarkets because customers have large quantities of items laid on the conveyer belts. Eliminating the belt preloading while the cashier is finishing up with the previous customer results in added delay. Since belt-preloading also determines how groceries will be bagged, this also increases inconvenience for the customers. It also voids the value of 20-items-or-less lines.

IAmTheWalrusGuy Says:

Dec 30, 2011 - you mean fluorescent lighting?

Uzamaki312 Says:

Jan 6, 2012 - there is a store in a mall around my house that does lines like that

CarlosIsDown Says:

Feb 7, 2012 - Fry's does one line for all the cashiers.

DanielMelAU Says:

Feb 16, 2012 - Mind blown.

bacon31 Says:

Feb 18, 2012 - Walmart does this at the new locations.

exxx247 Says:

Mar 6, 2012 - Belt preloading can occur while scanning is occurring..it should be almost no difference for most customers

exxx247 Says:

Mar 6, 2012 - That's not correct. With this system you are effectively splitting average customer delay times by the number of cashiers that are present. If two people in a row are holding up the line, you have one other line, what are the odds of three people being very slow? So you should always have less wait time on average than what you would spend in a segregated line structure.

crampssss Says:

Mar 28, 2012 - O_O Let the odds be with you?!?! And this was made 2 years before Hunger Games O_O

jackasskillthecow Says:

Mar 28, 2012 - i love your videos they are very help full to me :D much thansks

heyheyheysniper Says:

Mar 29, 2012 - This video is freaking awesome!!!!!

timerider4 Says:

Apr 3, 2012 - Barns & Noble is pretty much the only major store I've seen to do this regularly. Best Buy does it during the holiday season.

poptheman1 Says:

Apr 5, 2012 - may the odds be ever in your favor

CloverFuchs Says:

Apr 20, 2012 - Every Military BX/PX and Commissary uses a single line, at least all of the ones I've been to.

khajiit92 Says:

May 5, 2012 - single lines are used for loads of things, post offices and banks for example (in UK at least)

squirrel86401 Says:

May 11, 2012 - Fry's electronics (at least every one I've ever been to) set up their stores to use one line from the get go.

sadisticoctopus Says:

May 11, 2012 - False. The Hunger Games book came out in 2008.

ExcludedLayman Says:

May 12, 2012 - The most strangely apropos memory just surfaced: The Erlang is a unit in telephony.Huh.

perh11 Says:

May 15, 2012 - jeg kan læse det der står :D

hardwarejunkie9 Says:

May 22, 2012 - Absolutely brilliant. As an industrial and systems engineer, this is an excellent primer video for the basis of efficiency analysis of networks.It actually is a full engineering discipline!

TheChosenBlox Says:

May 22, 2012 - It's a common phrase. he didn't even quote it exactly.

BlindGuardian050 Says:

May 24, 2012 - Nice vid

DarkMoonDroid Says:

May 25, 2012 - Your old skool red phone is AWESOME!!! :-D

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