Krzysztof Michalak

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This page contains hard IRP instances generated using the method described in the paper:

K. Michalak Generating hard inventory routing problem instances using evolutionary algorithms GECCO '21 Proceedings of the Genetic and Evolutionary Computation Conference, Prague, Lille, France - July 10-14, 2021, ISBN: 978-1-4503-8350-9, pp. 243-251, ACM New York, NY, USA, 2021.

You can view the presentation accompanying the paper here.

These instances are made available for non-commercial use only. In particular it is prohibited to use these instances for the development of commercial software products.
If you publish a paper using the instances presented here, please cite the paper listed above.

Name	Instance	Solution	Cost
hard1n10	hard1n10.dat	hard1n10.sol	5982.16
hard1n15	hard1n15.dat	hard1n15.sol	5830.22
hard1n20	hard1n20.dat	hard1n20.sol	7995.11
hard1n25	hard1n25.dat	hard1n25.sol	9202.31
hard1n30	hard1n30.dat	hard1n30.sol	5864.77
hard1n35	hard1n35.dat	hard1n35.sol	5917.19
hard2n10	hard2n10.dat	hard2n10.sol	5911.11
hard2n15	hard2n15.dat	hard2n15.sol	7682.56
hard2n20	hard2n20.dat	hard2n20.sol	6950.62
hard2n25	hard2n25.dat	hard2n25.sol	5241.9
hard2n30	hard2n30.dat	hard2n30.sol	9568.57
hard2n35	hard2n35.dat	hard2n35.sol	9440.06
hard3n10	hard3n10.dat	hard3n10.sol	7164.72
hard3n15	hard3n15.dat	hard3n15.sol	5958.00
hard3n20	hard3n20.dat	hard3n20.sol	9535.86
hard3n25	hard3n25.dat	hard3n25.sol	6273.89
hard3n30	hard3n30.dat	hard3n30.sol	8905.87
hard3n35	hard3n35.dat	hard3n35.sol	5589.58
hard4n10	hard4n10.dat	hard4n10.sol	7091.61
hard4n15	hard4n15.dat	hard4n15.sol	6815.92
hard4n20	hard4n20.dat	hard4n20.sol	8381.88
hard4n25	hard4n25.dat	hard4n25.sol	7626.69
hard4n30	hard4n30.dat	hard4n30.sol	11394.15
hard4n35	hard4n35.dat	hard4n35.sol	5043.55
hard5n10	hard5n10.dat	hard5n10.sol	5131.55
hard5n15	hard5n15.dat	hard5n15.sol	6951.92
hard5n20	hard5n20.dat	hard5n20.sol	4898.61
hard5n25	hard5n25.dat	hard5n25.sol	10734.47
hard5n30	hard5n30.dat	hard5n30.sol	5465.78
hard5n35	hard5n35.dat	hard5n35.sol	5706.3

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