Benchmark Instances in .mps format

The first two columns of the following table give information about the problem domain of the instances. The third column gives the number of instances in the collection which are available in the .mps format. The “ASCII” column contains links to the instances in text format (if available), where as the “MPS” column contains links to the instances in .mps format. An entry of “email” in the “MPS” column indicates that the .mps instances are accessible only via email to anureet “at” cmu “dot” edu. The ASCII-to-mps format conversion code is available for some of the instances as indicated in the column titled “Code”. The format conversion code uses COIN-OR libraries and is otherwise self-contained. In order to assess the computational hardness of these instances, the result of running CPLEX for a fixed period of time is also provided in the form of two files – input_configuration.txt and instance_info.txt. The former contains the CPLEX configuration which was used (time limit and  MIP emphasis) and the later contains a summary of the experiment for each instance which includes the number of (rows, columns, binary variables, integer variables), best-solution value & best-bound found by CPLEX, number of branch and bounds enumerated and the version of CPLEX used for the experiment. This information can be accessed via the “CPX info” column of the table.