Abstract: One of the models of organizational performance evaluation is excellence diamond although, this model is the model of organizational excellence but with pathology approach is also taken into consideration. Iran power and water export of equipment and services company (Sunir) according to activity environment and to protect market and competitive advantages; needs to further improve in all aspects of the organization. This research seeks to identify the injuries and the problems that on the way of achieve to excellence based on diamond standard model of excellence in the eight dimension (leadership, staff, organizational culture, quality of service, organizational strategy, information management, customer orientation, organizational structure) there is for public company of sunir, statistical population of this research was all employees of sunir company. In this research, standardized questionnaire of diamond model of excellence was used with appropriate validity and reliability that were distributed among statistical population means entire staff of sunir company at 60 persons and number 40 questionnaires returned in full. Research findings showed that the priority criteria for attention in order of priority are: organizational structure, quality of service, information management, service strategy, leadership. Also priority criteria for action in order of priority are: leadership, quality of service, service strategy, organizational structure. The results of research also showed that sunir company in terms of leadership, quality of service, service strategy and organizational structure has serious damages. In the end strategies were proposed to increase level of excellence of sunir public company (treatment of damages).