Recently, the environment requires more emphasis on reverse logistics in order to maintain sustainability of the human civilization. The article introduces a sustainable model for reverse logistics that is based on two storage facility. Generally speaking, the essential commodities are...

The paper deals with a joint project of fishery and poultry while growth rates of both the species depend on the available nutrients and environmental carrying capacities of biomasses. The demand rates of both the species in the market vary with the selling prices and on-hand stock of the...

In this paper, for the first time, an inventory control model to determine the optimal order and shortage quantities of a perishable item when the supplier offers a special sale is developed. Four possible cases based on decision that the purchaser might make about the first replenishment policy...