Years ago Indra Nooyi made an audacious strategy shift beyond unhealthy snacks and drinks. She was prescient—as well as disciplined and tough—but the challenges are still daunting. ... The infractions might seem insignificant—one missing can of Pepsi on one shelf in one store in one city in one country—but for Nooyi it is this level of detail that sets her company apart. “We ought to keep pushing the boundaries to get to flawless execution,” she declares. “Flawless is the ultimate goal.” ... You can’t blame anyone at PepsiCo for feeling a sense of urgency—or embattlement—in recent years. Their staple products, soda pop and potato chips, are only slightly less demonized these days than cigarettes. ... now in her eighth year in the grueling crucible that is the leadership of one of America’s most globally recognized brands, it just may be a moment to exhale. You could even call it vindication. From the start of her tenure she dared to acknowledge what was obvious to everyone outside the business but unutterable to those inside it: Junk food makes people fat and harms their health. Nooyi began emphasizing products that are at least a bit healthier than the traditional chips and soda—a pivot some observers thought could sink the company. Now shoppers are proving her right.