MEXCLP.py

This is an implemenation of the MEXCLP model.

By solving MEXCLP (Maximum Expected Coverage Location Problem), ambulances are assigned to bases to maximize on-time arrivals. Below, all parameters are discussed.

Parameters:

• q (float) – Input parameter called the busy fraction. Can be interpreted as the probability that any ambulance is busy at any time.

• NUM_AMBULANCES (int) – The number of ambulances that should be assigned to bases.

• TIME_THRESHOLD (float) – Represents the threshold for the driving time in minutes.

• DATA_DIRECTORY (str) – The folder, relative to the ROOT_DIRECTORY (automatically determined), where the input data is located.

• OUTPUT_DIRECTORY (str) – The folder, relative to the ROOT_DIRECTORY (automatically determined), where the output files should be saved.

• NODES_FILE (str) – The name of the file that contains the data with the nodes of the region.

• BASE_LOCATIONS_FILE (str) – The name of the file that contains the nodes where bases are located.

• TRAVEL_TIMES_FILE (str) – The name of the file that contains the data with the siren travel times between nodes.

• RESULTS_FILE (str) – The name of the lp and csv output files.

• SOLVER_NAME (str) – The name of the solver that should be used. Examples are “GUROBI_CMD” and “PULP_CBC_CMD”.