Wal-Mart has highly efficient supply chain management practices that have contributed to its success. It uses advanced IT systems and large distribution centers to procure goods directly from manufacturers. This allows Wal-Mart to replenish stores within 2 days, faster than competitors. Wal-Mart also owns thousands of trucks that deliver goods, keeping transportation costs lower than competitors. Through constant communication between stores and suppliers, Wal-Mart keeps close track of inventory levels and sales data to forecast demand. These integrated supply chain practices help Wal-Mart offer consistently low prices that drive high sales volumes.