| Indexes |
| I | set of health centers of city, i = {1 … 51} |
| J | set of affected zones of city, j = {1 … 71} |
| L | set of restricted areas for location, l = {1 … 36} |
| K | set of borderlines, k = {1 … 5} |
| Parameters |
| Aj | coordinate on the x-axis of the affected zone j, j ∈ J |
| Bj | coordinate on the y-axis of the affected zone j, j ∈ J |
| BRk | parameter b of the borderline k, k ∈ K |
| Mk | parameter m of the borderline k, k ∈ K |
| Ci | capacity of the health center i, i ∈ I |
| PXl | location point on x-axis of restricted areas l, l ∈ L |
| PYl | location point on y-axis of restricted areas l, l ∈ L |
| MDl | minimum distance from coordinate (PXl, PYl) to restricted area l, l ∈ L |
| NAj | number of injured at the affected zone j, j ∈ J |
| HXi | coordinate on the x-axis of the health center i, i ∈ I |
| HYi | coordinate on the y-axis of the health center i, i ∈ I |
| HO | number of fixed health centers i, i ∈ I |
| Decision variables |
| Xi | coordinate on the x-axis of the location of the health center i, i ∈ I |
| Yi | coordinate on the y-axis of the location of the health center i, i ∈ I |
| Nji | number of injured patients in the affected zone j attended by the health center i, i ∈ I and j ∈ J |
| with the set of decision variables α = {(Xi, Yi), Nij} |