Submitter Variables Constraints Density Status Group Objective MPS File
Gleb Belov 11659 18442 2.54224e-04 easy piperout 8124 piperout-27.mps.gz

Pipe routing with flexibility constraints. Instances with _GCM in the name are simple routing

Instance Statistics

Detailed explanation of the following tables can be found here.

Size Related Properties
Original Presolved
Variables 11659 9346
Constraints 18442 12571
Binaries 11514 9216
Integers 121 108
Continuous 24 22
Implicit Integers 0 28
Fixed Variables 19 0
Nonzero Density 0.000254224 0.000330781
Nonzeroes 54662 38863
Constraint Classification Properties
Original Presolved
Total 18442 12571
Empty 0 0
Free 0 0
Singleton 0 0
Aggregations 45 45
Precedence 6044 4619
Variable Bound 8160 5310
Set Partitioning 46 55
Set Packing 19 18
Set Covering 0 929
Cardinality 12 0
Invariant Knapsack 3961 1446
Equation Knapsack 2 2
Bin Packing 0 0
Knapsack 0 0
Integer Knapsack 3 5
Mixed Binary 12 8
General Linear 138 134
Indicator 0 0

Structure

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

value min median mean max
Components 1.505150
Constraint % 0.0079500 3.15935 0.0079500 96.9772
Variable % 0.0195637 1.56857 0.0195637 47.5399
Score 0.518358

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 8124 8124 0 0 0 - 2018-10-13 Solution found during MIPLIB2017 problem selection.

Similar instances in collection

The following instances are most similar to piperout-27 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
piperout-08 10399 10245 130 24 14589 44959 Gleb Belov piperout easy 125055
piperout-03 9526 9373 129 24 12246 39067 Gleb Belov piperout easy 74982
piperout-d27 13104 12931 149 24 17470 224457 Gleb Belov piperout easy 8124
supportcase17 1381 732 235 414 2108 5253 Michael Winkler easy 1330
piperout-d20 11961 11788 149 24 15562 190915 Gleb Belov piperout easy 29948

Reference

@Inbook{Belov2017,
author="Belov, Gleb
and Garcia de la BAnda, Maria
and Czauderna, Tobias
and Wybrow, Michael
and Wallace, Mark",
editor="Rueher, Michel",
title="An Optimization Model for 3D Pipe Routing with Flexibility Constraints",
bookTitle="Principles and Practice of Constraint Programming: 23rd International Conference, CP 2017, Proceedings",
year="2017",
publisher="Springer International Publishing",
}

Last Update Nov 17, 2018 by Gregor Hendel
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