Supply chain network design is a strategic process that involves mapping and optimizing the movement of goods from suppliers to end customers, encompassing stages from sourcing and production to inventory management. This process aims to improve facility placement, transportation routes, and labor allocation, ultimately reducing costs and enhancing efficiency. Geographic information systems (GIS) play a critical role by providing visibility into demand patterns and helping with location-based decisions. Supply chain network optimization, a subsequent step, fine-tunes logistics and transportation aspects to meet customer demand cost-effectively, enabling organizations to adapt quickly to market changes. The benefits of a well-designed supply chain network include reduced operating costs, improved risk management, and minimized environmental impact, as well as facilitating better decision-making through enhanced visibility of product movement. Best practices in network design involve mapping current networks, aligning with business strategies, segmenting inventory, evaluating supplier relationships, leveraging data and forecasting, incorporating GIS technology, designing for flexibility, and regularly reviewing and refining the network. Tools like Felt's browser-based platform simplify the visualization and optimization of supply chain networks through intuitive design and collaborative features.