This document discusses the impact and benefits of RFID technology on supply chain efficiency. It notes that major retailers like Walmart and the Department of Defense will require RFID tagging on shipments by 2005. RFID allows real-time tracking of inventory from manufacturer to distribution center to store shelves. This reduces the "bullwhip effect" where demand is exaggerated at each supply chain level. RFID also enables vendor-managed inventory where manufacturers replenish retailer inventory based on real-time data. Overall, RFID provides more accurate inventory information and analysis to reduce out-of-stock items, labor, and overall inventory levels across the supply chain for benefits to both retailers and manufacturers.