Direct Store Delivery (DSD) and Distribution Centre (DC) Delivery are two important methods of product distribution in retail supply chain management. Both methods aim to ensure the timely availability of products at retail stores, but they differ in the way goods move from suppliers to retailers and in the responsibilities involved. Direct Store Delivery (DSD) refers to a distribution method in which the supplier or manufacturer delivers products directly to individual retail stores without routing them through a central distribution centre. Under this system, suppliers generally manage transportation, delivery scheduling, merchandising, inventory replenishment and, in some cases, shelf arrangement. DSD is particularly common for products that require frequent replenishment, have short shelf lives, or need specialized handling. Beverages, bread, dairy products, newspapers, snacks and certain fresh foods are typical examples. One major advantage of DSD is faster replenishment. Since products move directly from the supplier to the store, an additional distribution-centre handling stage is eliminated. This can be especially valuable for perishable products where freshness is an important factor. DSD also allows suppliers to maintain closer relationships with retailers and monitor product displays, stock levels and promotional activities directly. It can reduce the retailer's requirement for warehouse space and handling activities. However, DSD may involve higher transportation costs because