The need for accurate assessment and accountability is of paramount professional concern to psychiatry. The authors state that ego functions assessment (EFA) is reliable and valid quantitative technique, useful for these purposes in a variety of psychiatric settings. They suggest the various uses of EFA in five such areas: Professional Standards Review Organizations (PSRO) and third-party funding, forensic psychiatry and legal responsibility, the monitoring of psychotherapeutic drugs, research and planning in psychotherapy, and psychological testing. The authors condlude the EFA is a dynamically sophisticated and easily learned form of mental status examination and that its refinement by extensive use and simplification is likely.