DAVID L. WOODRUFF
PROFESSOR OF MANAGEMENT
- Curriculum Vitae
Graduate School of Management
University of California, Davis
Davis, CA 95616-8609
Notation lecture for 252 and 206 (a huge file)
Notation example for 252 and 206 (a very large file)
Introduction to Computational Optimization for Production Planning in Supply Chain examples: MPL, MOSEL, AMPL, GAMS, OPL, AIMMS
I am past chair of the INFORMS Computing Society,
which has a lot of interesting members working on optimization, computer science and artificial intelligence.
There is a typo in the "Sizes" paper: The paper
"Optimal Selection of Subsets of Sizes for Production," with S. Jorjani and C. Scott International Journal of Production Research, 37 (1999), 3697-3710 has a typographical error in constraint (7): the summation is for j greater than or equal to i, so i and j should be reversed in the summand, i.e., it should be x_jits (you cannot cut something and make it bigger). This error was repeated (via cut and paste) in the appendix of the paper
"A Class of Stochastic Programs with Decision Dependent Random Elements," with T.W. Jonsbraaten and R. J.-B. Wets,
Annals of Operations Research 82 (1998) 83-106 where the "sizes" problem was used as an example.
The smps file sizes.cor did not have this error. However, sizes.cor does have one error:
Y06JJ01 P06JJ01 -1.0 P05JJ02 -1.0
Y06JJ01 P06JJ01 -1.0 P06JJ02 -1.0
This error also appears in deterministic equivalents generated from the file sizes.cor, such as sizes3.mps, etc. None of the algorithmic conclusions are affected by this, but I regret the error nonetheless because I know it creates confusion if you try to duplicate the results.