Claudio Fernández-Aráoz, a senior adviser at the global executive search firm Egon Zehnder, makes the case for finding a company’s next CEO inside the firm. But to find the best contenders, organizations have to learn what to look for, how to find it, and how to nurture it. Fernández-Aráoz is the co-author of the new HBR article “Turning Potential into Success: The Missing Link in Leadership Development.”