Original Title: Operations Research Models Applied For Allocation Of Public Resources Under The Efficiency Effectiveness Equity 3e PerspectiveAbstract: The main difference among operation research models for the private sector and the public sector is the inclusion of the equity criteria. In this sense, one of the objectives of this project was identifying proposed models to solve allocation problems in the public sector, under the efficiency, effectiveness and equity (3E) principles as the providers of public services need to guarantee non-discriminatory access to the services to all of the population, and at the same time make the best use of the limited resources. We identified various models that include the equity perspective, but we focused on the data envelopment analysis (DEA) resources allocation model developed by Goaz Golany and Eran Tamir, as it integrates the 3E. This integration is important as the tradeoffs among certain decisions at each dimension could affect the performance in other dimension. The second objective of this thesis is validating a systematic budget allocation methodology for the primary health care sector in Costa Rica. The institution evaluated is the area of health Jiménez Núñez (Goicoechea 2) which is composed of 10 Basic Teams for Comprehensive Care in Health (EBAIS). The EBAIS were selected as the decision making units for the validation. We applied the model under study progressively, as the first evaluation done was the DEA to obtain the efficiency scores per EBAIS: four EBAIS out of ten were found efficient. Then, to demonstrate how the DEA allocation model improves the efficiency of the DMUs under study, we applied the model for the multi-input and multi-output scenario. As a result of the proposed allocation, now eight EBAIS were found efficient. Finally, we include the equity perspective into the analysis. The DEA proved to be a useful management tool as it performs the efficiency assessment from a comparison between DMUs through data and among data by generating the efficiency frontier. To run this operations research model, various analytical choices must be made. When these choices depend heavily on the analysts, the appropriateness of the model depends on the consistency between the analytical choices and the judgment of experienced decision makers. There may exist generally accepted standards in the efficiency and equity literature, but the mathematical model developed will always have to address different factors depending on the object of study. The DEA model has been widely used in health institutions and many other public sector organizations in the world, but this is the first application at the primary health system at Costa Rica and additionally it is including the equity perspective, as most of the literature shows DEA case studies for efficiency assessment only. We can also think of standardizing and systematizing the decision making at the health areas by disseminating the use of the DEA-RAM with equity model and then applying the extensions along the model to be broadened to incorporate resource allocation at the national level as it would be valuable to develop this analysis for the 103 health areas at Costa Rica as DMUs.