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

Andrew Stamps | 10752 | 27169 | 6.86233e-04 | easy | gasprod | 2310.0993127 | gasprod1-3.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 | 6896 |

Constraints | 27169 | 13608 |

Binaries | 3717 | 1596 |

Integers | 0 | 0 |

Continuous | 7035 | 5300 |

Implicit Integers | 0 | 0 |

Fixed Variables | 987 | 0 |

Nonzero Density | 0.000686233 | 0.000731835 |

Nonzeroes | 200463 | 68676 |

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

Total | 27169 | 13608 |

Empty | 626 | 0 |

Free | 0 | 0 |

Singleton | 858 | 0 |

Aggregations | 1175 | 462 |

Precedence | 3130 | 2487 |

Variable Bound | 3890 | 2274 |

Set Partitioning | 0 | 0 |

Set Packing | 0 | 0 |

Set Covering | 0 | 0 |

Cardinality | 0 | 0 |

Invariant Knapsack | 3374 | 1692 |

Equation Knapsack | 0 | 0 |

Bin Packing | 2665 | 1008 |

Knapsack | 346 | 317 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 11105 | 5368 |

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 % | 0.0073800 | 0.185778 | 0.0073800 | 31.3847 | |

Variable % | 0.0224014 | 0.151296 | 0.0224014 | 17.5627 | |

Score | 0.529249 |

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

`## Warning in lapply(df["exactobjval"], as.numeric): NAs introduced by coercion`

ID | Objective | Exact | Int. Viol | Cons. Viol | Obj. Viol | Submitter | Date | Description |
---|---|---|---|---|---|---|---|---|

1 | 2310.099 | 6.2e-06 | 7e-07 | 2.9e-06 | - | 2018-10-10 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to gasprod1-3 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.

`No bibliographic information available`

Last Update 2024 by Julian Manns

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