HBR Case Study. Bob’s Meltdown. There’s big trouble at Concord Machines. Bob Dunn, head of Concord’s most profitable business unit, just blew his top at Annette Innella, a new executive brought in to lead the company’s knowledge management initiative. CEO Jay Nguyen doesn’t want to lose either of them at least he doesn’t think he does. What should he do about his star manager’s tantrum?