Looking at the most successful AI transformations of the past decade, we have observed a common thread: what we call the 70/20/10 rule. Seventy percent of the effort involves people: processes, ways of working, incentives, and performance targets. Twenty percent entails getting the data right. The remaining ten percent is about the technology foundation. This empirical finding comes from reviewing the level of resources we and our clients have deployed across hundreds of digital transformations....