BOVAS ABRAHAM, PhD, is Associate Professor in the Department of Statistics and Actuarial Science at the University of Waterloo, Ontario, Canada. He is a Fellow of the American Statistical Association, and a member of the Statistical Society of Canada and the Royal Statistical Society. Dr. Abraham received his PhD in statistics from the University of Wisconsin–Madison.

JOHANNES LEDOLTER, PhD, is Associate Professor in both the Department of Statistics and Actuarial Science and the Department of Management Sciences at the University of Iowa. He is a Fellow of the American Statistical Association and a member of the International Statistical Institute. Dr. Ledolter is coauthor of Statistical Quality Control: Strategies and Tools for Continual Improvement and Achieving Quality Through Continual Improvement, both published by Wiley. He received his PhD in statistics from the University of Wisconsin–Madison.