The phrases in this definition bring into focus three aspects of quality, services (interventions), targeted health outcomes, and consistency with current knowledge (research evidence). It expresses an underlying belief that research produces the most reliable knowledge about the likelihood that a given strategy will change a patient's current health status into desired outcomes. Alignment of services with current professional knowledge (evidence) is a key goal in quality. The definition also calls into play the aim of reducing illogical variation in care by standardizing all care to scientific best evidence.
The EBP movement began with the characterization of the problem—the unacceptable gap between what we know and what we do in the care of patients (IOM, 2001). เท the report, Crossing the Quality Chasm (IOM, 2001), IOM experts issued the statement