Jack J. Phillips, PhD, is chairman of the ROI Institute and a world-renowned expert on measurement and evaluation. Phillips provides consulting services for Fortune 500 companies and workshops for major conference providers worldwide. Phillips is also the author or editor of more than 100 articles and more than 75 books, including Measuring the Success of Leadership Development: A Step-by-Step Guide for Measuring Impact and Calculating ROI (ATD Press). His work has been featured in the Wall Street Journal, Bloomberg Businessweek, Fortune, and on CNN.