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In production inventory systems, there are situations, in which it is not possible to have single rate of production throughout the production period. Items are produced at different rates during sub periods so as to meet various constraints that arise due to change in demand pattern, market fluctuations etc. This paper models such a situation by assuming constant rate of demand a and varying rates...
We study a finite source (s, S) inventory system with postponed demands and server vacation. We adopt a modified M vacation policy which is defined as: Whenever the inventory level reaches zero, the server goes to inactive period which comprises the inactive-idle and vacation period. If replenishment occurs during the inactive-idle period, the server becomes active immediately, or otherwise he goes...
We consider a continuous-review inventory system with perishable items and make-to-stock production facility. The customers are assumed to be generated by a finite number of sources. Each customer demands a single item. The life time of each item is assumed to be exponential. Customers demand is met from stock, if available, otherwise the customer enters into an orbit. The orbiting customer sends...
In this article, we consider a continuous review inventory system with service facility consisting of finite waiting hall and a single server. The customers arrive according to a Poisson process and any arriving customer, who finds the waiting hall is full, is considered to be lost. The individual customer’s unit demand is satisfied after a random time of service, which is assumed to be exponential...
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