Submitter Variables Constraints Density Status Group Objective MPS File
Andrew Stamps 29568 73448 1.30241e-04 easy gasprod 1628548.2968 gasprod2-1.mps.gz

Production planning model of a second industrial gas system. Two model instances included.

Instance Statistics

Detailed explanation of the following tables can be found here.

Size Related Properties
Original Presolved
Variables 29568 23131
Constraints 73448 39540
Binaries 7389 4657
Integers 0 0
Continuous 22179 18474
Implicit Integers 0 0
Fixed Variables 1348 0
Nonzero Density 0.000130241 0.000140586
Nonzeroes 282846 128580
Constraint Classification Properties
Original Presolved
Total 73448 39540
Empty 116 0
Free 0 0
Singleton 683 0
Aggregations 3591 3180
Precedence 18301 7024
Variable Bound 15356 9572
Set Partitioning 0 0
Set Packing 316 0
Set Covering 0 0
Cardinality 0 0
Invariant Knapsack 3661 2305
Equation Knapsack 0 0
Bin Packing 1002 658
Knapsack 528 0
Integer Knapsack 0 0
Mixed Binary 29894 16801
General Linear 0 0
Indicator 0 0

Structure

Available nonzero structure and decomposition information. Further information can be found here.

value min median mean max
Components 2.655138
Constraint % 0.00262 0.124811 0.0078600 13.13530
Variable % 0.00737 0.101258 0.0110477 9.70355
Score 0.533232

Best Known Solution(s)

Find solutions below. Download the archive containing all solutions from the Download page.

ID Objective Exact Int. Viol Cons. Viol Obj. Viol Submitter Date Description
1 1628548 8.6e-06 9e-07 3.35e-05 - 2018-10-13 Solution found during MIPLIB2017 problem selection.

Similar instances in collection

The following instances are most similar to gasprod2-1 in the collection. This similarity analysis is based on 100 scaled instance features describing properties of the variables, objective function, bounds, constraints, and right hand sides.

Instance Variables Binaries Integers Continuous Constraints Nonz. Submitter Group Status Objective
gasprod2-2 29568 6826 0 22742 72728 280740 Andrew Stamps gasprod easy 1375631.6625
gasprod1-3 10752 3717 0 7035 27169 200463 Andrew Stamps gasprod easy 2310.0993127
gasprod1-2 10752 3716 0 7036 27169 200460 Andrew Stamps gasprod easy 983.039488258
gasprod1-1 10920 4053 0 6867 27695 201348 Andrew Stamps gasprod open 291.5247315909*
unitcal_7 25755 2856 0 22899 48939 127595 R. O’Neill easy 19635558.244

Reference

No bibliographic information available

Last Update Nov 19, 2018 by Gregor Hendel
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