Science of Improvement: How to Improve
Institute for Healthcare Improvement (IHI)


IHI has provided the Model for Improvement as the framework to guide improvement work. The Model for Improvement,* developed by Associates in Process Improvement, is a simple, yet powerful tool for accelerating improvement. This model is not meant to replace change models that organizations may already be using, but rather to accelerate improvement.

Learn about the fundamentals of the Model for Improvement and testing changes on a small scale using Plan-Do-Study-Act (PDSA) cycles.


Langley GL, Nolan KM, Nolan TW, Norman CL, Provost LP. The Improvement Guide: A Practical Approach to Enhancing Organizational Performance (2nd edition). San Francisco: Jossey-Bass Publishers; 2009.

Featured Content

Free Videos

Learn more about the fundamentals of improvement in these free videos.

The Science of Improvement… on a Whiteboard!

Introduction to the Model for Improvement

Building Skills in Data Collection and Understanding Variation

Using Run and Control Charts to Understand Variation