Omnichannel retailing demands a fundamental shift in supply chain strategy because it transforms the way products flow, information is shared, and customer expectations are fulfilled. Traditionally, retail supply chains were designed either for brick-and-mortar stores or for online channels, operating in relatively separate silos. Physical stores focused on bulk replenishment to outlets, while e-commerce emphasized centralized warehouses and direct-to-customer delivery. However, in an omnichannel environment, customers expect seamless integration between online and offline touchpoints, such as buying online and picking up in store, returning online purchases at physical outlets, or checking in-store availability through digital platforms. These expectations require a synchronized, flexible, and responsive supply chain structure rather than isolated channel-based systems. The fundamental shift lies in moving from a channel-centric to a customer-centric supply chain model. Inventory must be visible and accessible across all channels in real time. Instead of maintaining separate stock pools for online and offline sales, retailers increasingly adopt a unified inventory management system. This approach improves stock utilization and reduces the risk of stockouts or overstocking. Advanced technologies