So the final goal is improving health of population.

Instead of quality assurance we should adopt quality improvement approach. The philosophy of this approach is the following: improvement is always possible and bad health care is not the fault of health providers, but of the structure and organisation of health care system itself.

Additional reading:

"Promoting Quality in Health Care", a background paper for USAID Conference, 29-31 July, 2002.
(http://www.eurasiahealthtransitionconference.org/qualityseg.pdf)

Christel A. Woodward "Strategies for Improving Health Workers' Skills" (http://hrhtoolkit.forumone.com/mstr_quality_care/mstr_quality_care.pdf).