A framework for the continual improvement of health care: building and applying professional and improvement knowledge to test changes in daily work.

We seem to lack a well-defined, comprehensive, and shared understanding of what is required for the continual improvement of health care--at the organizational and the industry levels. This article presents a framework that defines the new body of knowledge which, when joined with the professional knowledge of health care workers, can make continual improvement possible; and gives requirements for building and applying this knowledge to bring about improvement in health care organizations.