A methodology to rationalize health care? Health technology assessment (HTA) is defined as all the methods, used by health professionals, to promote health, prevent & treat disease and to improve rehabilitation and long term care (Dept of health National Health Service, UK 1994). These methods include “hardware” such as syringes, medicines and diagnostic equipment etc, and “software” as health education, diagnostic & therapeutic policies/procedures as well as skill of people involved in the profession.