# OR-Library

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.

## Linear programming

There are currently 27 data files.

These test problems are taken from J.E.Beasley "Linear programming
on Cray supercomputers" Journal of the Operational Research Society
41 (1990) 133-139.

The problems in Table 1 of the above paper are based on the LP relaxation
of a set of test problems for the set covering problem given by Balas and
Ho. See the file scpinfo for details of how to obtain these problems (15
data files in total).

The problems in Tables 2 and 3 of the above paper are based on the LP
relaxation of a set of test problems for the assignment problem. See the
file assigninfo for details of how to obtain these problems (12 data files
in total).

The values of the optimal solutions for these test problems can be found
in the files lpopt and assignopt.

Click here
to access these files

OTHER SOURCES

Linear programming problems can also be obtained from NETLIB

A variety of linear programming problems are also available
here