You’ve spent months pitching category managers, refining your packaging, and liquidating a massive chunk of your marketing budget to cover slotting fees. Then, the email arrives: Your distribution is approved. You’ve crossed the finish line. You're on the shelf. Time to celebrate, right? Not so fast. In modern grocery retail, the shelf is not the finish line. It is the starting block of a brutal operating test. And if your strategy stops at "sell-in," you are leaving your pro