The Oxford HAI–PwC AI Transformation Series brings together insights from our global 360° AI Transformation Survey, which gathers data from companies across industries and regions worldwide. Designed using the Human–AI Interaction Lab’s pioneering four-level framework—spanning automation, personalization, operational innovation, and business model innovation—the survey offers a powerful lens for understanding where organisations truly are in their AI journey and what separates incremental adoption from transformative impact. This series distills the survey’s findings into clear, actionable insights, revealing how leading firms are progressing across the four levels and why many remain stuck in early stages. The first article introduces the framework itself, setting the foundation for all subsequent analyses. Grounded entirely in real-world data, the series provides executives, practitioners, and policymakers with a rare, evidence-based view of how to accelerate AI maturity, unlock higher-order value, and build the capabilities needed to thrive in the intelligent era.