## Data Source
This is a random data set generated by the author of this paper using the same method reported in [Galvão and ReVelle 1996](https://doi.org/10.1016/S0966-8349%2897%2983342-6) and [Galvão et al. 2000](https://doi.org/10.1016/S0377-2217%2899%2900171-X) in which the demand follows the uniform distribution $U (20, 30)$ for G&R100 and normal distribution $N (80, 15)$ for G&R150.
