deletions | additions       diff --git a/section_Prepositioning_emergency_supplies_to__.tex b/section_Prepositioning_emergency_supplies_to__.tex  index 0bd64b6..47b202d 100644  --- a/section_Prepositioning_emergency_supplies_to__.tex  +++ b/section_Prepositioning_emergency_supplies_to__.tex 
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location-inventory \\  Klibi et al. \cite{KlibiEtal2013} proposed a three-echelon framework for prepositioning of relief supplies. Their model consist of supplier that supplies distribution centers (DCs), DCs that are responsible for distributing relief items among point of distributions (PODs), and PODs that distribute items directly to affected areas. The problem is to determine location and number of DCs, DCs' capacity and their inventory level of each item. The authors assume that multiple natural disasters happening over a discrete time horizon. For minimization of transportation and procurement costs, a multi-period scenario-based framework with three phases is proposed for designing emergency supply network. The first stage, scenario generation phase, uses Monte Carlo simulation for generating hazard scenarios over a planning horizon. The reason for using Monte Carlo simulation is associated complexity of demand scenarios, which has to take account for location of disaster, amount of demand, capacity limit of suppliers and inaccessibility of DCs. the second phase formulate the model as two-stage stochastic problem and solved it using average approximation sample (SAA) approach. next, at the third phase, evaluates and compares candidate designs, those DCs and suppliers that are effected by the disaster are excluded from candidate set.  The evaluation of the model is carried out on a real-data provided by North Carolina Emergency Management Division (NCEM). (NCEM) and solve via a commercial solver.