We consider the one-warehouse multiple retailer inventory model with a submodular joint setup cost function. The objective of this model is to determine an inventory replenishment policy that minimizes the long-run average system cost over an infinite time horizon. Although the optimal policy for this problem is still unknown, a class of easy-to-implement power-of-two policies are 98% effective...

Any industry has its own supply chain where it is not necessary to have all stages in the supply chain and the optimal o rdering policies of those indiv idual stages may be different. This paper p resents an extension of two–level supply chain inventory model d iscussed in related works. The main consideration of this paper is to determine the optimal ordering policy according to inventory and ...

With the large-scale introduction of the data warehouse concept, a new phenomenon has appeared in the field of information systems development. Facts in a data warehouse – as opposed to those in an operational database – mainly represent immutable, aggregated or otherwise derived, historical information. The aggregation level and specific layout of management information reports often cannot be...

In this paper we turn our attention to comparing the policy function obtained by Beck and Wieland (2002) to the one obtained with adaptive control methods. It is an integral part of the optimal learning method used by Beck and Wieland to obtain a policy function that provides the optimal control as a feedback function of the state of the system. However, computing this function is not necessary...

Given a picker-to-part warehouse having a simple rectilinear aisle arrangement with north2 south storage aisles and east-west travel aisles (or “cross aisles”), this paper investigates the 3 optimal placement of the cross aisles as a consequence of the probability density function of the 4 order pick locations, as determined by the storage policy. That is, for a given storage policy, 5 what pla...

Data warehouse is an archive that stores the data of an enterprise gathered from multiple sources making it an environment suitable for optimal information processing. For any enterprise, a data warehouse is crucial since this comprehensive information stored in the data warehouse could be used to analyze long term data and carry out analysis of trends over a period of time. Since the data invo...

In order to solve the problem of poor refrigeration performance during operation system under low temperature conditions, this paper designs a test bench study effect different air volumes on cooling capacity conditions 32?C outside warehouse and -10?C inside warehouse. The results show that when volume condenser is set 65% unit evaporator 100%, 8.62 kW, compressor power 1.88 COP 4.55 energy ef...

background and objectives: a sudden jump in blood demand during natural disasters may have strong negative impact on the performance of blood supply chain. appropriate response to the emergency situations, requires predictive approach to determining the optimal allocation of blood supply chain resources for various disaster scenarios. the present study, thus, presents an optimization model aime...