Assessment and development centres have been established for some years as an effective method for selecting and developing people. This book provides guidance on how to run them, examining the entire process, from the underlying concepts to the most effective methods of validation. The main objectives of the book are: to establish a thorough understanding of the principles and practice of assessment centres; to provide sufficient knowledge to enable practitioners to run their own events in a professional manner; to help readers to recognize when they may need to call on outside expertise; and to equip readers to ask pertinent questions of any prospective advisers.