ABSTRACT The Brazilian Navy (BN) has its combatant force concentrated in an area with only one exit to the sea. Nevertheless, Brazil has an extensive coast that needs to be patrolled and, in case of any kind of conflict, the BN must be able to defend the sovereignty and interests of the country. For this purpose, a robust and decentralized naval force is necessary, which allows the fulfillment of its mission. This paper aims to classify the most suitable cities in Brazil to be established as naval bases by applying the ELECTRE-MOr hybrid method. Seventeen cities were analyzed, which have an opening to the sea and a pre-existing minimum port structure. The alternatives were evaluated by specialists from the BN, with more than twenty years of active service, in the light of operational, economic and strategic criteria. As a result, five alternatives were classified as the most indicated headquarters for the decentralization of the naval power: Belém/PA, São Luis/MA, Fortaleza/CE, Recife/PE and Aratu/BA. This article presents relevance to academia and society, as it represents the application of a method in the state of the art to support the decision-making process in a significant problem for the sovereignty of Brazil, presenting a methodology that can be applied in issues of tactical, operational, strategic and political levels. (BN Nevertheless conflict country purpose necessary mission ELECTREMOr ELECTRE MOr analyzed preexisting pre existing structure service operational criteria result power BelémPA Belém PA Belém/PA LuisMA Luis MA Luis/MA FortalezaCE Fortaleza CE Fortaleza/CE RecifePE Recife PE AratuBA Aratu BA Aratu/BA society decisionmaking decision making tactical levels

Abstract Paper aims This paper aims to select the best helicopter to be acquired by the Brazilian Navy (BN), enabling greater logistical and combat capacity in marine operations. For this purpose, we applied the AHP-TOPSIS-2N, a hybrid multicriteria method composed by the Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and two normalization procedures (2N). Originality In this paper, a real military case study is conducted to support the decision-making process in BN, contributing to the better performance of the Brazilian Armed Forces. The application of the methodology resulted in two lists of ordering and prioritization of helicopters, providing transparency and simplicity to the decision-making process. Research method We analyzed six aircraft models, considering attack helicopters used by the Armed Forces of developed countries, in the light of their operational and tactical criteria. The selected helicopter would be employed in the fire support and reconnaissance, required by the Brazilian Marine Corps Amphibious Operations. Main findings After the application of the method, the AH-64E APACHE was chosen as the most suitable helicopter to be acquired by the Brazilian Navy. Implications for theory and practice This study brings valuable contribution to academia and society, since it represents the application of a Multi-criteria Decision Analysis (MCDA) method in the state of the art to contribute to the solution of a real problem of the BN. The methodology presented in this paper can notably be used to solve real problems of the most varied types – tactical, operational and strategic – thus being a very useful method for decision-making.

RESUMO OBJETIVO: Aplicar o método multicritério THOR 2 para selecionar o navio de assistência hospitalar (NAsH) da Marinha do Brasil mais indicado para apoiar o combate à pandemia de covid-19. MÉTODOS: Para a estruturação e modelagem do problema, foram usados os três primeiros estágios da Soft Systems Methodology. Já para a avaliação e ordenação das alternativas, foi utilizado o método de análise multicritério Thor 2, comparando quatro classes de NAsH à luz de seus critérios operativos e hospitalares: “Dr. Montenegro”, “Soares Meirelles”, “Oswaldo Cruz” e “Tenente Maximiano”. O navio escolhido apoiaria o sistema hospitalar do Amazonas, que apresenta número cada vez maior de casos de covid-19. RESULTADOS: Após a aplicação dos métodos, foi possível analisar três cenários distintos de ordenação das alternativas, o que permitiu uma análise de sensibilidade robusta, conferindo maior transparência e confiabilidade ao processo decisório. O NAsH “Oswaldo Cruz” foi selecionado para ser empregado no combate à pandemia. CONCLUSÕES: Este trabalho traz valiosa contribuição para academia e sociedade, uma vez que representa a aplicação de um método de auxílio à decisão multicritério no estado da arte para contribuir com a solução de um problema real que afeta milhões de pessoas no Brasil e no mundo.

ABSTRACT OBJECTIVE: To apply the THOR 2 multi-criteria support system to select the Brazilian navy's most suitable hospital care vessel (NAsH) to support the fight against the covid-19 pandemic. METHODS: We used the first three stages of the Soft Systems Methodology for structuring and modeling of the problem. For the evaluation and ordering of alternatives, we used the Thor 2 multi-criteria support system, comparing four classes of NAsH in the light of their operational and hospital criteria: “Dr. Montenegro,” “Soares Meirelles,” “Oswaldo Cruz” and “Tenente Maximiano.” The chosen ship would support the amazon hospital system, which has an increasing number of cases of covid-19. RESULTS: After the application of the methods, we analyzed three distinct scenarios of ordering the alternatives, which allowed a robust sensitivity analysis, conferring greater transparency and reliability to the decision-making process. The NAsH “Oswaldo Cruz” was selected to be used in the fight against the pandemic. CONCLUSIONS: This study brings valuable contribution to academia and society, since it represents the application of a multi-criteria decision-aid method in the state of the art to contribute to the solution of a real problem that affects millions of people in Brazil and worldwide.

RESUMO OBJETIVO: Aplicar o método multicritério THOR 2 para selecionar o navio de assistência hospitalar (NAsH) da Marinha do Brasil mais indicado para apoiar o combate à pandemia de covid-19. MÉTODOS: Para a estruturação e modelagem do problema, foram usados os três primeiros estágios da Soft Systems Methodology. Já para a avaliação e ordenação das alternativas, foi utilizado o método de análise multicritério Thor 2, comparando quatro classes de NAsH à luz de seus critérios operativos e hospitalares: “Dr. Montenegro”, “Soares Meirelles”, “Oswaldo Cruz” e “Tenente Maximiano”. O navio escolhido apoiaria o sistema hospitalar do Amazonas, que apresenta número cada vez maior de casos de covid-19. RESULTADOS: Após a aplicação dos métodos, foi possível analisar três cenários distintos de ordenação das alternativas, o que permitiu uma análise de sensibilidade robusta, conferindo maior transparência e confiabilidade ao processo decisório. O NAsH “Oswaldo Cruz” foi selecionado para ser empregado no combate à pandemia. CONCLUSÕES: Este trabalho traz valiosa contribuição para academia e sociedade, uma vez que representa a aplicação de um método de auxílio à decisão multicritério no estado da arte para contribuir com a solução de um problema real que afeta milhões de pessoas no Brasil e no mundo.

ABSTRACT OBJECTIVE: To apply the THOR 2 multi-criteria support system to select the Brazilian navy's most suitable hospital care vessel (NAsH) to support the fight against the covid-19 pandemic. METHODS: We used the first three stages of the Soft Systems Methodology for structuring and modeling of the problem. For the evaluation and ordering of alternatives, we used the Thor 2 multi-criteria support system, comparing four classes of NAsH in the light of their operational and hospital criteria: “Dr. Montenegro,” “Soares Meirelles,” “Oswaldo Cruz” and “Tenente Maximiano.” The chosen ship would support the amazon hospital system, which has an increasing number of cases of covid-19. RESULTS: After the application of the methods, we analyzed three distinct scenarios of ordering the alternatives, which allowed a robust sensitivity analysis, conferring greater transparency and reliability to the decision-making process. The NAsH “Oswaldo Cruz” was selected to be used in the fight against the pandemic. CONCLUSIONS: This study brings valuable contribution to academia and society, since it represents the application of a multi-criteria decision-aid method in the state of the art to contribute to the solution of a real problem that affects millions of people in Brazil and worldwide.