Order lead time is the time it takes for a company to receive an order after placing it with a supplier. It includes the time it takes for the supplier to process the order, manufacture or procure the products, and transport them to the company's location. Order lead time is an important factor in inventory management, as it affects the level of safety stock needed to meet customer demand and avoid stockouts. By reducing lead times, companies can improve their responsiveness to customer needs, reduce inventory costs, and improve their competitive advantage.