Gareth Parry, PhD, senior scientist at the Institute for Healthcare Improvement (IHI), leads the rapid-cycle evaluation system within IHI. In addition, he provides scientific leadership in a number of IHI programs. He also serves as Clinical Assistant Professor at Harvard Medical School. Prior to joining IHI, Dr. Parry was an Improvement Advisor for the National Initiative for Children's Healthcare Quality and Director of Quality Measurement and Analysis at Children's Hospital Boston. In the UK, he was a Reader in Health Services Research at the University of Sheffield, evaluating health services delivery and developing and applying risk-adjustment methods in intensive care.