This document summarizes Dr. John Boulton's experience as the 2012-13 Quality Improvement Fellow at Sheffield Teaching Hospitals. It discusses his work leading cultural change towards quality improvement, building improvement capability through teaching tools and techniques, analyzing patient data, and achieving results such as reducing wait times for infusions from over 5 hours to the target of 4 hours or less. The document emphasizes the need to understand healthcare systems and how excursions outside the field can provide deep learning opportunities to drive improvement.