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Today’s warehouses are no longer merely places to accumulate and store inventory to meet future demand. Through the use of real-time technology, warehouses are being transformed into distribution centers that speed inventory through the supply chain and configure the goods just prior to shipment to meet customer requirements. Therefore, today’s Warehouse Management System is expected to be a key link in enabling efficiency in the overall supply chain process [3,7]. The modern WMSs are expected to provide extensive warehousing functions as well as a wide range of value-added services. WMS vendors are beginning to bundle other applications that are traditionally associated with Supply Chain packages. This paper introduces an advanced eWarehouse Management System (eWMS), its high level functionality, its architecture, and a high level benefit analysis over existing WMS implementations. In addition, a brief survey of WMS market in Hong Kong is also described.