Which procurement innovation was first developed specifically for government contracting but later widely adopted by private retail supply chains?

Government procurement represents a massive market, with the U.S. federal government alone spending over $600 billion annually on products and services. Supply chain management in the public sector faces unique challenges including strict regulatory requirements, transparency mandates, and political considerations that private sector retailers don't encounter. Test your knowledge about how governments source, purchase, and manage their supply chains in this trivia challenge!

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Reverse auctions (where suppliers bid down prices to win contracts)
Just-in-time inventory management
RFID tracking systems for inventory
Drop shipping direct-to-consumer delivery model