definition of fill rate relates to inventory management and supply chain performance. It represents the percentage of customer orders fulfilled from available stock without delay. A high fill rate indicates strong inventory accuracy and responsiveness, while a low rate signals stockouts or process inefficiencies. The definition of fill rate is crucial in retail and e-commerce, as it directly impacts customer satisfaction and repeat business. Measuring this metric allows companies to forecast demand better, optimize stocking strategies, and improve fulfillment reliability. Tools like ERP and inventory software often automate this tracking for real-time analysis.