Appendix . About the Authors

William C. Byham, Ph.D.

William C. Byham is chairman, CEO, and cofounder of Development Dimensions International (DDI), a global human resource consulting firm specializing in leadership development and selection system design and implementation. Before founding DDI in 1970, Dr. Byham was manager of selection, appraisal, and general management development for J.C. Penney Company.

At both J.C. Penney and DDI, Dr. Byham pioneered a number of important human resource technologies that have had a significant impact on how people are managed. These technologies include the assessment center method, behavior-based interviewing, behavior modeling, behavioral job analysis methodology, and Acceleration Pools. These technologies ...

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