topic Re: Shop-Customer-Assignment in Mathematical Optimization, Discrete-Event Simulation, and OR

Shop-Customer-Assignment

deleted_user — Wed, 09 Sep 2009 09:13:54 GMT

Hello!

I need an idea to following problem:

Given: 300 shops, 800.000 customers

Problem:

250.000 customers should be assigned to the shops, optimized via distance.
There are different classes of shops (A,B,C,D) with different amounts of customers to assign (A=1000, B=500, C=300, D=100).

In some areas are a lot of shops in a small circle.

My first solution is:
1. Estimation of distance to nearest shop.
2. Order customers with sorting by shops and distance to nearest shop with the lowest amount of potential costumers first.
3. Select correct amount of costumers with nearest shop considering this sorting and the amount in classes.

After that I got 83% correct classification, 83% of the customers are assigned to the nearest shop. In 17% are assigned to other shops (second best, third best, ...). The Problem is to achiev the correct amount of costumers in the classes. It is not possible to become 100% correct assignments ... but I think it is possible to get more then 83%. You can see it in a map.

Any idea to do it in a job and not 'hand-made'?

Thank you and greetings,

Martin

Re: Shop-Customer-Assignment

sbb — Wed, 09 Sep 2009 11:20:36 GMT

Unstated, but presumably you have zip code? You will find useful technical and conference topic-related reference information as well as SAS-hosted documentation at the SAS support http://support.sas.com/ website.

Scott Barry
SBBWorks, Inc.

Usage Note 5325: Calculating the distance between ZIP codes
http://support.sas.com/kb/5/325.html

Re: Shop-Customer-Assignment

RAAgnew — Sat, 19 Sep 2009 03:38:47 GMT

How come the class quantities don't add to 250,000?

Re: Shop-Customer-Assignment

deleted_user — Thu, 24 Sep 2009 12:38:26 GMT

In sum there are 250.000, but 17% are not signed to the nearest shop.

The cause is, if there are a lot of shops at the same location and I firstly fill up the shops with a small costumer density around, I get a lot of wrong classifications. I think I need a re-classification in a second step to change some customers between the shops.