OR-Library is a collection of test data sets for a variety of OR problems.
A full list of the test data sets available in OR-Library can be found here.
There are currently 15 data files. These data files are the test problem sets VII, X, XIII and A to C in Table 2 of J.E.Beasley "Lagrangean heuristics for location problems" European Journal of Operational Research, vol.65, 1993, pp383-399. The following table gives the relationship between test problem set and the appropriate files: Problem set Files VII cap71, ..., cap74 X cap101, ..., cap104 XIII cap131, ..., cap134 A capa B capb C capc The format of these data files is: number of potential warehouse locations (m), number of customers (n) for each potential warehouse location i (i=1,...,m): capacity, fixed cost for each customer j (j=1,...,n): demand, cost of allocating all of the demand of j to warehouse i (i=1,...,m) As these test problems are derived from test problems for the capacitated warehouse location problem they include capacity figures for each potential warehouse location and demand figures for each customer. These figures should (obviously) be ignored when solving these problems as uncapacitated warehouse location problems. The value of the optimal solution for each of these data files is given in the file uncapopt. The largest file is capc of size 1300Kb (approximately). The entire set of files is of size 4500Kb (approximately).
Click here to access these files
Other test problems are also available here