In the 1990s, the new public administration (New Public Management) brought the consolidation of private sector administration practices into the public management environment. In Brazil, one of the aspects of this new administration was through the implementation of quality systems in public bodies that demonstrated an interest in offering services with quality in their deliveries and processes. In this context, the ISO 9001 standard spread your recognition from the private to the public environment, becoming a reference tool for the implementation of quality systems in government entities. Identifying the need for an approach closer to the governmental environment, the International Organization for Standardization – ISO developed and published a specific standard for local governments (city councils) to implement the ISO 9001 standard, which is a supporting standard called ISO 18091. Given the panorama presented and identifying the need to implement ISO in the General Comptroller of Maceió, this work proposes to carry out a case study whose main objective will be to investigate the institutional development index for good governance, in accordance with the parameters established in ISO 18091. This study can be characterized as pratical, descriptive in nature and qualitative in approach. As a means of investigation, bibliographical research, participant observation and the application of the standard's self-assessment tool are initially proposed. For data analysis, classification is suggested based on the prism established by the standard in its guidelines for the 39 qualitative indicators based on the “tricolor matrix”, which will indicate the different levels of maturity. The expected results of the study focus on the diagnosis of the most fragile areas among the four groups of indicators of the standard and the possibility of easy identification of the main causes of these deficiencies, with a view to proposing action plans to resolve these deficiencies, as suggested by ISO 18091 standard. Finally, it is proposed to consolidate the information obtained in a Conclusive Technical Report, a technical technological product that must be presented as an annex to this study.