Deliver

Genetic algorithm and brute force method implementations for Multi Depot Vehicle Routing Problem.

Details ------There are n vehicles roaming around the city and m orders waiting for the delivery. Vehicles have a limited :

• amount of stock
• and predefined service durations.

This project has been developed with an inspiration from the method written by Ombuki-Berman et al.

Ombuki-Berman, Beatrice, and Franklin T. Hanshar. "Using genetic algorithms for multi-depot vehicle routing." Bio-inspired algorithms for the vehicle routing problem. Springer, Berlin, Heidelberg, 2009. 77-99.

Usage

Create a new enviroment and install required packages: :: pip install -r requirements.txt Run script with this command: :: python -m deliver.main -i ./data/input.json --intermediate_prints -o ./data/output.json

To use Cordeau’s Instances please use related input data and set --benchmark_input option. :: python -m deliver.main -i ./data/p01 --intermediate_prints --benchmark_input -o ./data/output.json

To use brute force method add --brute_force to the command: :: python -m deliver.main -i ./data/input.json --intermediate_prints --brute_force -o ./data/output.json

Output

"Deliver" produces a json file shown in data\output.json.

Example outputs can be found in data folder.

• data/output_brute_force_with_no_constraint.json for brute-force approach. In this example that is assumed:

  • There is no predefined service durations
  • Vehicles have infinite capacity

• data/output_brute_force_with_predefined_service_duration.json

  • Included predefined service durations
  • Vehicles have infinite capacity. There is no capacity constraint

• data/output_brute_force_with_capacity_constraint_and_predefined_service_duration.json

  • Included capacity constraint
  • Included predefined service durations

• data/output_genetic_algoritm_with_capacity_constraint_and_predefined_service_duration.json for genetic algorithm approach.

  • Included capacity constraint
  • Included predefined service durations

Installation for Development ------------#. Install the project's development and runtime requirements:

pip install -r requirements-dev.txt

1. Run the tests:

   paver test_all

Authors

• Halil İbrahim Bestil