Those responsible for professional development in public and private-sector organizations have long had to deal with an uncomfortable reality. Billions of dollars are spent on formal education and training directed toward the development of job incumbents, yet the recipients of this training spend all but a fraction of their working life outside the training room--in meetings, on the shop floor, on the road, or in their offices. Faced with the need to promote "continuous learning" in a cost-effective manner, trainers, consultants, and educators have sought to develop ways to enrich the...