A methodology for evidence-based health policymaking: the Welsh Protocol Enhancement Project

The emergence of evidence-based health care at an operational level is well underway in the National Health Service, driven on by clinical effectiveness initiatives. Unless evidence-based care is supported by evidence-based policymaking, the environment will not be conducive to effective professional practice. The article describes a methodology that has been developed to meet the needs of the Project for the Enhancement of the Welsh-Protocols for Investment in Health Gain. A detailed description of the background, aims, methods, planning, and supporting documentation of the project is given. The methodological principles are transferable to other policymaking scenarios.