Submitter Variables Constraints Density Status Group Objective MPS File
Gerald Lach 923564 440134 1.10969e-05 open 1234700* rwth-timetable.mps.gz

University Course Timetabling from the RWTH Aachen

Instance Statistics

Detailed explanation of the following tables can be found here.

Size Related Properties
Original Presolved
Variables 923564 401544
Constraints 440134 323365
Binaries 317079 248523
Integers 0 2471
Continuous 606485 150550
Implicit Integers 0 2471
Fixed Variables 1 0
Nonzero Density 1.10969e-05 3.31275e-05
Nonzeroes 4510790 4301450
Constraint Classification Properties
Original Presolved
Total 440134 323365
Empty 18908 0
Free 0 0
Singleton 45896 0
Aggregations 21137 20924
Precedence 64128 15959
Variable Bound 34057 33908
Set Partitioning 7987 30186
Set Packing 162749 160101
Set Covering 0 0
Cardinality 19687 0
Invariant Knapsack 0 0
Equation Knapsack 132 0
Bin Packing 0 0
Knapsack 0 0
Integer Knapsack 0 0
Mixed Binary 65453 62287
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
Constraint %
Variable %
Score

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 1234700 1234700 0 0 0 - 2018-10-13 Solution found during MIPLIB2017 problem selection.

Similar instances in collection

The following instances are most similar to rwth-timetable 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
nursesched-medium04 29667 29613 54 0 8668 621829 Haroldo Gambini Santos nursescheduling easy 237.0
nursesched-sprint02 10250 10230 20 0 3522 204000 Haroldo Gambini Santos nursescheduling easy 58.0
neos-498623 9861 8500 0 1361 2047 148434 NEOS Server Submission neos-pseudoapplication-5 easy 16.6
savsched1 328575 252731 0 75844 295989 1770510 Gerardo Gonzalez easy 3217.7
neos-933966 31762 27982 0 3780 12047 180618 NEOS Server Submission neos-pseudoapplication-34 easy 318.0

Reference

@article{lach2015solving,
  title={Solving huge real-world timetabling instances},
  author={Lach, G and Lach, M and Zorn, E},
  journal={MISTA},
  pages={370--378},
  year={2015}
}

Last Update Nov 19, 2018 by Gregor Hendel
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