Chang Seong Ko

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As cost pressures continue to mount in this era of economic slowdowns, a growing number of firms have begun to explore the possibility of managing product returns in a more cost-efficient and timely manner. However, few studies have addressed the problem of determining the number and location of initial collection points in a multiple time horizon, while(More)
As the result of an explosive growth in e-tailing, telemarketing, and television home-shopping industries, the demand for the direct shipment of purchased goods by express couriers has increased over the last several years. The success of an express courier service often depends heavily on the direct marketing firm’s ability to extend its cutoff time(More)
Recently, the demand for the direct shipment of purchased goods by express couriers has increased as the result of an explosive growth in e-tailing, telemarketing, and TV home-shopping industries. However, since too many express courier companies have been emerging over the last several years, competitiveness for market share is very severe among them. This(More)
The success of express courier services often depends on both how to assign service centers to consolidation terminals and how to extend their cutoff time (deadline) for direct home deliveries coordinated by service centers near customers. This study suggests an approach to design express courier service networks with respect to assignment of service(More)