A pattern of three success factors for CQI emerges: (1) continuous and reliable information, including measurement, about best and current practice; (2) engagement of everybody in all phases of the improvement work: the patient and family, the leadership, the professional environment and the staff; and (3) an infrastructure based on improvement knowledge, with multidisciplinary teams, available coaching, learning systems and sustainability systems.

The determinants for success derived from this qualitative study (preparedness, management, networking, ability to improvise) may be universally applicable to understanding the conditions for resilient and safe healthcare services, and of general interest for quality improvement in healthcare.