Which military procurement strategy was pioneered during WWII that revolutionized retail analytics for defense contractors?

During times of conflict, military procurement becomes a critical aspect of national defense strategy. Throughout history, certain periods have seen unprecedented spikes in defense spending and product development. This poll explores an interesting fact about retail analytics in the context of military procurement during a major global conflict. Test your knowledge about the economic aspects of warfare and how governments managed massive supply chain challenges.

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Operations Research - mathematical modeling to optimize resource allocation and supply chain management
Fixed-Price Contracting - standardizing costs across all military equipment to prevent price gouging
Regional Procurement Zones - dividing the country into procurement regions to streamline distribution
Vertical Integration Model - requiring manufacturers to control all aspects from raw materials to finished products