Sage X3 ERP assists in optimising inventory levels by providing a comprehensive, real-time inventory management system. It automates inventory tracking and planning, helping businesses maintain the right stock levels to avoid overstocking and understocking. By using economic order quantity (EOQ) calculations, as part of its comprehensive MRP engine, Sage X3 optimises the amount of inventory to order, balancing carrying costs with ordering costs, which aids in reducing excess stock while ensuring availability to meet customer demand.