Are airlines good at inventory demand planning? If you answered yes, why are operators ordering more parts on an aircraft-on-the-ground (AOG) basis? A number of people say the rising AOG orders are not correlated with problematic aircraft or engines that need new parts. In many cases, the need to receive parts via express delivery-in hours instead of several days or weeks-links to the fact that airlines generally hold less inventory, and suppliers can expedite deliveries.
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