*********************************
There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
*********************************
TITLE: MIP Models for Production/Distribution and Production/Sequencing
SPEAKER: Dr. Laurence Wolsey
ABSTRACT:
After a brief introduction on single item lot-sizing, we present tight or tighter formulations for a couple of single and multi-item constant capacity lot-sizing variants.
We then examinehow reformulation resultsforbasic(typically) single-itemproblems can be used or extended to tackle realistic multi-item, multi-site problems. As a first application we consider a two-level supply chain, namely a multi-item n-period model with production sites and sales areas with production at the sites and transportation to the areas. We demonstrate the effectiveness of a multi-commodity reformulation combined with the use of inequalities for family set-ups when there are capacities at the transportation level..
The second application is a multi-item parallel machine model with start-up and/orsequencedependent changeovercosts. Hereweshowhowtoextend existing valid inequalities and formulations to deal with identical parallel machines. Some limited computational results are presented.