Have you ever played a game of telephone, where a whispered message gets hilariously scrambled as it passes from person to person? Supply chains can suffer from a similar problem—except instead of words, it’s order quantities that get distorted, and the results are serious: piles of extra inventory, frustrating stockouts (when a product is out of stock), and wasted money. This chapter explains why this happens and shows how companies can work together to keep information flowing smoothly, using trust and technology.