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 12 data files. These data files are taken from J.E.Beasley "Linear programming on Cray supercomputers" Journal of the Operational Research Society 41 (1990) 133-139. Eight problems are from Table 2 of that paper. The following table gives the relationship between test problem set in Table 2 and the appropriate files: Problem set Files 100 assign100 200 assign200 300 assign300 400 assign400 500 assign500 600 assign600 700 assign700 800 assign800 The format of these data files is: number of items to be assigned (n) for each item i (i=1,...,n): the cost of allocating item i to item j (c(i,j),j=1,...,n) Four problems are from Table 3 of that paper. The following table gives the relationship between test problem set in Table 3 and the appropriate files: Problem set Files 800 assignp800 1500 assignp1500 3000 assignp3000 5000 assignp5000 The format of these data files is: number of items to be assigned (n) for each valid assignment: i, j, c(i,j) the cost of allocating item i to item j The value of the optimal solution for each of these data files is given in the file assignopt. The largest file is assign800 of size 2000Kb (approximately). The entire set of files is of size 12000Kb (approximately).
Click here to access these files