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논문 기본 정보

자료유형
학술저널
저자정보
MAHAPATRA, NIRMAL KUMAR (Department of Mathematics, Panskura Banamali College) BHUNIA, ASOKE KUMAR (Department of Mathematics, University of Burdwan) MAITI, MANORANJAN (Department of Applied Mathematics with Oceanology and Computer Programming, Vidyasagar University)
저널정보
한국전산응용수학회 Journal of applied mathematics & computing Journal of applied mathematics & computing 제19권 제1호
발행연도
2005.1
수록면
397 - 414 (18page)

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In the existing literature, most of the purchasing models were developed only for retailers problem ignoring the constraint of storage capacity of retailers shop/showroom. In this paper, we have developed a deterministic model of wholesaler-retailers' problem of single product. The storage capacity of wholesaler's warehouse/showroom and retailers' showroom/shop are assumed to be finite. The items are transported from wholesaler's warehouse to retailers' Own Warehouse (OW) in a lot. The customer's demand is assumed to be displayed inventory level dependent. Demands are met from OW and that spaces of OW will immediately be filled by shifting the same amount from the Rented Warehouse (RW) till the RW is empty. The time duration between selling from OW and filling up its space by new ones from RW is negligible. According to relative size of the retailers' existing (own) warehouse capacity and the demand factors, different scenarios are identified. Our objectives are to optimize the cost functions of wholesaler and two retailers separately. To solve this problem, a real coded Genetic Algorithm (GA) with roulette wheel selection/reproduction, whole arithmetic crossover and non-uniform mutation is developed. Finally a numerical example is presented to illustrate the results for different scenarios. To compare the results of GA, Generalised Reduced Gradient Method has been used for the problem. Also, a sensitivity analysis has been performed to study the variations of the optimal average cost with respect to the different parameters.

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