This article discusses the role of service improvement methodology in changing the quality of care delivered. It outlines the six-stage framework for quality improvement recommended by the NHS Institute for Innovation and Improvement. The reader is encouraged to complete a series of activities to plan and deliver a service improvement project. Potential challenges to the successful delivery of a service improvement project are also considered. The article concludes with an example of the use of the six-stage framework to improve the quality of urinary catheter care in one acute NHS trust.