چكيده به لاتين
The present thesis concern with a two echelon-supply chain composing one supplier and two competing farmers for breeding growing-mortal items. The items grow in the supplier site and then in the farmers’, and next, the farmers sell the items to price-dependent market in a competing environment in which each farmer faces a price-dependent demand that depends on his/her own and the other competitor sale price. In this study, the presented inventory model is investigated under two approaches. In the first approach, the problem is modeled in a general form to which each growing-mortal items can applied. In the second approach, a new class of inventory model is proposed in which growth and mortality rates are simultaneously considered for a specific growing-mortal item (rainbow trout). Moreover, a novel feeding function is proposed to calculate the growth costs, which accounts for main part of trout breeding, much accurate. Indeed, we study the growth period of items in the supplier and then in the farmer sites to maximize the profit of the supplier as a leader and the farmers as a follower in under a Stackelberg game. To show how can reduce the production cost under two aforementioned approach by two coordination mechanisms, revenue-sharing and revenue and cost sharing, the model is solved under centralized and decentralized cases. Finally, the proposed model is solved by numerical method using Mathematica 10.2, and sensitivity analysis on key parameters is also conducted to derive some managerial insights for growing-mortal item breeding.
