In an increasingly globalized and volatile market environment, supply chain efficiency represents a key driver of competitive advantage, particularly in the fashion industry, where seasonality, rapid trend evolution and strict time-to-market constraints require high levels of coordination and flexibility. This thesis analyzes and improves procurement processes within the supply chain of the Miroglio Group with a specific focus on the raw materials department. The research combines a theoretical framework grounded in supply chain management, Supply Chain 4.0, Lean Manufacturing and strategic procurement with an applied case study developed during an internship experience. After outlining the evolution and organizational structure of the Miroglio Group, the study examines the operational dynamics of the raw materials sourcing process, including fabric and trims research, supplier selection, coding procedures (PLM and ERP systems), quality control and production monitoring.