İkame mallar üreten monopol için ürün devir stratejileri ve envanter politikası

In many industries, effective management of product rollovers is extremelyimportant for being able to survive. In management of product rollovers, timingdecision; i.e., time to introduce of a secondary product and time to phaseout a primal product is critical. Inventory policy is another factor that affectsmanagement of rollovers.In this study, we analyze primary rollover strategy of a monopoly manufacturingtwo substitute products together with its contingency strategies over a twoperiod planning term. Specifically, we consider four different primary rolloverstrategies, namely Base Strategy, IS Strategy, ISES Strategy and IFES Strategy,derived with existence/non-existence of the products. Base Strategy is associatedwith the case where we decide to introduce and sell only the primary product. Onthe other hand, IS Strategy brings introduction of a newer (secondary) product inthe second period. If monopoly chooses to make its move with IFES Strategy, itintroduces both of the products simultaneously in the first period while phasingout the primary product in the beginning of the next period. Another alternativestrategy, ISES Strategy, would be selling products in different periods, primaryproduct first and secondary product next.When a primary strategy is selected, there is a commitment to this strategy.In this study, to reflect market conditions, we consider two alternative demandforms; multiplicative and additive forms and there is an adjustment to marketthrough inventory policy. Firm replenishes its stocks with an order-up-to policyin each period where demands for these substitute products are assumed to becorrelated and these products assumed to be substitutable; i.e., there exists stockout-induced substitution between the products.In the analysis, we determine the optimal inventory levels when a specifiedrollover strategy is executed. Moreover, we explore the conditions, which playimportant role in making rollover strategies. Furthermore, factors that affectearly and late introduction of a new product into the market are investigated.We also discuss the factors that motivate a monopoly to introduce a new product.