Errata: Introduction to Computational Optimization Models for Production Planning in a Supply Chain
by Stefan Voß
and David Woodruff
Remarks and code in the book concerning the calculation of "Big M" are not correct in all settings.
The value of this data element must be large enough to exceed all possible production quantities.
A value of the larger of the sum of all demands times the largest R(i,j) or the largest lot size is
certainly safe.Theoretically, there is no problem if it is too large, but as a practical matter, an
overly large value creates round-off and precision problems that may be a nuisance. A value that
is too small, on the other hand, will result in a model that has no feasible solution even though
there would be a feasible solution if "Big M" was big enough.
On page 20, in the first full paragraph, the sentence that begins with
The assembly of AJ8172 requires 1...
should begin with
The assembly of AJ8172 requires two...
dlwoodruff@ucdavis.edu