When highly skilled subject matter experts, engineers, and managers leave their organizations, they take with them years of hard-earned, experience-based knowledge--much of it undocumented and irreplaceable. Organizations can thereby lose a good part of their competitive advantage. The tsunami of "boomer" retirements has created the most visible, urgent need to transfer such knowledge to the next generation. But there is also an ongoing torrent of acquisitions, layoffs, and successions--not...