Complexity of health technologies and increased demands for health care services concomitant with globalization in health care and finite resources have resulted in shortcomings in health delivery and have raised issues regarding equity. Most people experience some sort of denial, delay, deflection, dilution, deterrent, or selection when need health care services and profit is going to be the prevailing variable. Policy makers struggle to circumvent these problems in different ways, none of which prevail across a broad range of health care system. Evidence indicates priority SETTING in health care services inevitably requires explicit criteria. A variety of criteria which have been used in different health care system are discussed, focusing on experiences in community participation and approaches for community appraisal. Adopting experience from health care system, and evaluation adapted to respect national values will strengthen the burgeoning health sector reform in Iran. According to worldwide health care principals it seems crucial to establish a regulatory health council to underpin the evidence based priority SETTING process in Iran.

Let H be a complex Hilbert space. We study the geometry of the space of pairs (A, E), for A a (semidefinite bounded linear) positive operator on H and E a (bounded linear) projection on H such that AE=E*A.