Wednesday, September 20, 2006

A new northern passage?

Scientists shocked as Arctic polar route emerges

This is actually somewhat old news - for several years now folks have been anticipating new northern passages through the Arctic past Canada and past Russia.

Wednesday, August 23, 2006

Wonder Warehouse 1962?

An interesting ad from the November 1956 issue of Modern Mechanix.

Friday, August 18, 2006

Disaster logistics

MIT professor and logistics expert Yossi Sheffi appeared on WBUR's "Here and Now" radio program: Fixing FEMA

Thursday, March 30, 2006

Euclidean TSP in Excel VBA

TSP_draw.xls is a simple Excel VBA program that solves Euclidean traveling salesman problems and displays solutions graphically.

The program is "rough" - it was written such that beginning coders could modify and improve it.

Link: TSP_draw.xls
Capabilities: Euclidean TSP - solution algorithms and graphical display
Author: Michael H. Cole
License: GPL
Platform requirements: Microsoft Excel (VBA)
User-modifiable: Yes
Version: alpha

Tuesday, March 07, 2006

Daskin's "states" software

This software solves a TSP problem and a facilities location problem that use the 48 state capitals (and D.C.) as the underlying data set.

Link: http://users.iems.northwestern.edu/~msdaskin/Software.htm
Capabilities: TSP, location
Author: Mark S. Daskin
License: ?
Platform requirements: Microsoft Excel
User-modifiable: ?
Version: ?

Daskin's "SITUATION" facility location software

Software to accompany Daskin's text: Network and Discrete Location: Models, Algorithms, and Applications.

Link: http://users.iems.northwestern.edu/~msdaskin/BookSoftware.htm
Capabilities: P-median, P-center, Set Covering, Maximal Covering, Uncapacitated Fixed Charge Problems
Author: Mark S. Daskin
License: ?
Platform requirements: Microsoft Windows
User-modifiable: ?
Version: 5.7.0.9

Monday, February 27, 2006

Floyd's shortest path algorithm

floyd.xls is a simple Excel VBA program that implements Floyd's algorithm for finding the shortest paths between all nodes in a network. The program was written such that beginning coders could modify and improve it.

Capabilities: find shortest paths between all pairs of nodes in a network
Author: Michael H. Cole
License: GPL
Platform requirements: Microsoft Excel (VBA)
User-modifiable: Yes
Version: alpha

Tuesday, February 21, 2006

1-center facility location problem

hakimi_5.xls is a simple Excel VBA program that demonstrates Hakimi's algorithm for solving the 1-center facility location problem. The program was written such that beginning coders could modify and improve it.

Capabilities: site a single facility on a network to minimax customer travel time
Author: Michael H. Cole
License: GPL
Platform requirements: Microsoft Excel (VBA)
User-modifiable: Yes
Version: alpha

Friday, February 10, 2006

Houston road network

See www.houstonfreeways.com for an exhaustive pictorial history of Houston's extensive network of freeways.

Tuesday, February 07, 2006

Aggregating customers

Aggregate.xls is a simple Excel VBA program that demonstrates customer aggregation. The program was written such that beginning coders could modify and improve it.

Capabilities: graphically aggregate n customers into 100 customers
Author: Michael H. Cole
License: GPL
Platform requirements: Microsoft Excel (VBA)
User-modifiable: Yes
Version: alpha

Monday, February 06, 2006

City infrastructure

The Works: anatomy of a city (Kate Ascher) examines the infrastructure of a typical large city.

Logistics-related chapters include: Streets, Subway, Bridges & Tunnels, Rail Freight, Maritime Freight, Air Cargo, and Markets.

Tuesday, January 31, 2006

Vending machines on aircraft carriers

StrategyPage has an interesting inventory-related article: Why The World's Largest Vending Machine Matters. Typical soda machines on a carrier's hangar deck might need to be replenished several times a day. The new VIB machine is 3 times larger than a commerical machine, so might need replenishment only once per day.

I wonder what the cost-per-replenishment is on an aircraft carrier?

Friday, January 27, 2006

Material Handling Links

Michael Cole's Material Handing Page has sections on the Material Handling Industry of America trade association, Magazines & Journals, Societies & Associations, Research Groups, Equipment, Continuing Education, and Academic Courses.

InventoryOps Link Page

InventoryOps.com Links Page: Inventory Management, Manufacturing, Material Handling, and Warehousing.

Friday, January 13, 2006

Warehouse design software

Georgia Tech professors Bartholdi and Hackman have written a new book: Warehouse and Distribution Science.

The book's Supplement includes web-based Java software that addresses slotting, flow visualization, and pick-path design.