When Virginia “Ginni” Rometty became the CEO of IBM, in early 2012, she dutifully adopted her predecessor’s strategy. Sam Palmisano, who held the position for a decade, had vowed in 2010 that IBM would roughly double its per-share earnings within five years. Two-plus years into her tenure, Rometty concluded that trying to meet that goal would end up crippling IBM’s efforts to reinvent itself. She abandoned the plan in October 2014, thereby taking full ownership of the company’s future strategy and financial health. It’s been an interesting ride ever since. Rometty, 59, is on a protracted mission to make IBM a cloud-based “solutions” business. She has invested billions in advanced technologies while selling off legacy divisions that don’t fit the new model.

A version of this article appeared in the July–August 2017 issue of Harvard Business Review.