Design of a dynamic bi-objective relief routing network in the earthquake response phase

In humanitarian relief operations, especially when a disaster occurs, the transportation of both injured people to the medical centers and relief commodities to the affected area are vital. On the other hand, these disasters usually continue with a secondary disaster (e.g., Aftershocks of an earthquake) which decreases the service level of the affected area due to disruptions in the connection routes. This paper proposes a dynamic bi-objective, multi-commodity, multi-mode relief routing network, in which an inventory is taken into account for each affected area in preliminary periods of an earthquake response to overcome the probable shortages in subsequent periods. The objective functions attempt to simultaneously minimize total transportation and inventory cost and unserved injuries. Finally, a numerical example is solved using GAMS software.