Submitter | Variables | Constraints | Density | Status | Group | Objective | MPS File |
---|---|---|---|---|---|---|---|

Andrew Stamps | 10752 | 27169 | 6.86222e-04 | easy | gasprod | 983.039488258 | gasprod1-2.mps.gz |

Production planning model for an industrial gas process. Three instances of the model included.

Detailed explanation of the following tables can be found here.

Original | Presolved | |
---|---|---|

Variables | 10752 | 6890 |

Constraints | 27169 | 13577 |

Binaries | 3716 | 1592 |

Integers | 0 | 0 |

Continuous | 7036 | 5298 |

Implicit Integers | 0 | 0 |

Fixed Variables | 988 | 0 |

Nonzero Density | 0.000686222 | 0.000731344 |

Nonzeroes | 200460 | 68414 |

Original | Presolved | |
---|---|---|

Total | 27169 | 13577 |

Empty | 626 | 0 |

Free | 0 | 0 |

Singleton | 861 | 0 |

Aggregations | 1172 | 461 |

Precedence | 3126 | 2483 |

Variable Bound | 3894 | 2263 |

Set Partitioning | 0 | 0 |

Set Packing | 0 | 0 |

Set Covering | 0 | 0 |

Cardinality | 0 | 0 |

Invariant Knapsack | 3360 | 1689 |

Equation Knapsack | 0 | 0 |

Bin Packing | 2664 | 1007 |

Knapsack | 333 | 319 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 11133 | 5355 |

General Linear | 0 | 0 |

Indicator | 0 | 0 |

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

Decomposed structure of original problem (dec-file)

Decomposed structure after trivial presolving (dec-file)

value | min | median | mean | max | |
---|---|---|---|---|---|

Components | 2.513218 | ||||

Constraint % | 0.0074000 | 0.185795 | 0.0074000 | 32.1891 | |

Variable % | 0.0224215 | 0.151225 | 0.0224215 | 18.7668 | |

Score | 0.524123 |

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 | 983.0395 | 983.041 | 0 | 9e-07 | 0 | - | 2018-10-10 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to gasprod1-2 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.

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Last Update 2024 by Julian Manns

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