These Big Data case studies showcase its transformative impact across industries. Macy's adjusts pricing in real-time for 73 million items using SAS technology. A fast-food chain optimizes drive-through menus with data analysis. Walmart.com enhances customer experience, boosting purchases by 10-15%. Tipp24 AG reduces model-building time by 90% with KXEN software. Morton's The Steakhouse gains viral publicity through special orders. Police predict crime using PredPol's algorithm. American Express predicts account closures. Tesco optimizes energy efficiency. Express Scripts improves medication adherence. Infinity Property recovers $12 million from dark data. These cases highlight Big Data's potential across business realms.