Instances for the Capacitated Mobile Facility Location Problem

These data files correspond to p-med instances in Raghavan, S., Sahin, M., and Salman, F. S., "The Capacitated Mobile Facility Location Problem", published in the European Journal of Operational Research (https://doi.org/10.1016/j.ejor.2019.02.055).

The zip file contains two folders named "heterogeneous_facilities" and "homogeneous_facilities". Each of these folders contains further subfolders named "large_C_over_F" (where the |C|/|F| ratio is greater than 10) and "small_C_over_F" (where the |C|/|F| ratio is less than or equal to 10).

There are 28 instances in the "small_C_over_F folder" and 17 instances in the "large_C_over_F" folder. The tables in the paper report results for each of 28 instances (both homogeneous and heterogenous) in the "small_C_over_F" folders.

The format of these data files is:

|V|

d_{1,1} d_{1,2} ... d_{1,|V|}
d_{2,1} d_{2,2} ... d_{2,|V|}
...
d_{|V|,1} d_{|V|,2} ... d_{|V|,|V|}

w_{1} w_{2} ... w_{|V|}

Q_{1} Q_{2} ... Q_{|V|}

u_{1} u_{2} ... u_{|V|}

q_{1} q_{2} ... q_{|V|}

where:

|V| is the number number of vertices;
d_{i,j} (i,j = 1,...,|V|) is the distance between i and j
w_{j} (j = 1,...,|V|) is the facility locations and weights, if w_{j} > 0, there is a facility located at j and w_{j} is the facility weight
Q_{j} (j = 1,...,|V|) is the facility locations and capacities, if Q_{j} > 0, there is a facility located at j and Q_{j} is the facility capacity
u_{j} (j = 1,...,|V|) is the client locations and weights, if u_{j} > 0, there is a client located at j and u_{j} is the client weight
q_{j} (j = 1,...,|V|) is the client locations and demands, if q_{j} > 0, there is a client located at j and u_{j} is the client demand

Further details on these instances are provided in the paper mentioned above.