The objective of the present study is to propose a system that provides diagnoses for hospital organizations, which do not have the financial conditions to search for a Hospital Accreditation process, but which aim at quality and continuous improvement in the provision of their services. The bibliographic research supported the theoretical design work of the evaluation instrument, which is based on the Performance Evaluation Model Núcleo Interdisciplinar de Estudos em Gestão da Produção e Custos (NIEPC - Interdisciplinary Center for Studies on Production and Costs Management) and is complemented by observation points recommended by the Manual of Performance Organizations of Health Services of the Organização Nacional de Acreditação (ONA - National Accreditation Organization). The ONA and NIEPC instruments seek to improve the institution, both for results that lead to quality and for quality that leads to positive results. In the case of complex organizations, such as the health services, it is perceived that, although the NIEPC instrument can be applied to any type of organization in its original configuration, its complementarity with some fundamental points pointed out in the ONA Manual will be able to give a more efficient and accurate result in the applications in organizations of the said sector of activity. Thus, it is understood that the result may lead to a greater refinement of data for the elaboration of improvement plans that follow the diagnosis, based on the inclusion of a greater reference for obtaining future processes linked to Hospital Accreditation, if this is the focus or even for organizations that seek quality without being linked to a certifier, and can use the result to ensure safer care services.