Browsing by Author "Moreira, Miguel Ângelo Lellis"
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- Design and implementation of a supplier Kanban system in the automotive sector: an empirical studyPublication . Pereira, Maria Teresa; Lyra, Raquel; Moreira, Miguel Ângelo Lellis; Oliveira, Marisa; Ferreira, Fernanda A.; Silva, Francisco J. G.In an increasingly competitive automotive sector subject to rapid transformation, efficient supply chain management emerges as a critical component for success. In this context, this study explores a Kanban system within an automotive supplier to address the challenges of demand variability and inventory management. Employing an Action Research methodology, the case study unfolds four iterations, each advancing the Kanban solution towards greater efficiency and responsiveness. The initial phase identifies the critical issue of demand variability in part components, prompting a solution that integrates outlier analysis for forecast accuracy. Subsequent iterations refine this approach, evolving from fixed safety margins to a dynamic system based on service levels. A significant breakthrough is achieved in the latter stages, where the demand is aligned with the maximum machine consumption capacity, transitioning from weeks to days in lead time. This adjustment results in a notable reduction of Kanbans, effectively covering forecast peaks and optimizing space utilization. The final solution, entails a reconfiguration of storage racks tailored to the revised Kanban requirements. The outcome demonstrates a significant improvement in inventory management, aligning with the real-time production needs and showcasing the efficacy of a tailored Kanban system in a high variability environment.
- PROMETHEE-SAPEVO-M1 a Hybrid Approach Based on Ordinal and Cardinal Inputs: Multi-Criteria Evaluation of Helicopters to Support Brazilian Navy OperationsPublication . Moreira, Miguel Ângelo Lellis; de Araújo Costa, Igor Pinheiro; Pereira, Maria Teresa; dos Santos, Marcos; Gomes, Carlos Francisco Simões; Muradas, Fernando MartinsThis paper presents a new approach based on Multi-Criteria Decision Analysis (MCDA), named PROMETHEE-SAPEVO-M1, through its implementation and feasibility related to the decision-making process regarding the evaluation of helicopters of attack of the Brazilian Navy. The proposed methodology aims to present an integration of ordinal evaluation into the cardinal procedure from the PROMETHEE method, enabling to perform qualitative and quantitative data and generate the criteria weights by pairwise evaluation, transparently. The modeling provides three models of preference analysis, as partial, complete, and outranking by intervals, along with an intra-criterion analysis by veto threshold, enabling the analysis of the performance of an alternative in a specific criterion. As a demonstration of the application, is carried out a case study by the PROMETHEE-SAPEVO-M1 web platform, addressing a strategic analysis of attack helicopters to be acquired by the Brazilian Navy, from the need to be evaluating multiple specifications with different levels of importance within the context problem. The modeling implementation in the case study is made in detail, first performing the alternatives in each criterion and then presenting the results by three different models of preference analysis, along with the intra-criterion analysis and a rank reversal procedure. Moreover, is realized a comparison analysis to the PROMETHEE method, exploring the main features of the PROMETHEE-SAPEVO-M1. Moreover, a section of discussion is presented, exposing some features and main points of the proposal. Therefore, this paper provides a valuable contribution to academia and society since it represents the application of an MCDA method in the state of the art, contributing to the decision-making resolution of the most diverse real problems.
- A Systematic Approach to the Management of Military Human Resources through the ELECTRE-MOr Multicriteria MethodPublication . Costa, Igor Pinheiro de Araújo; Terra, Adilson Vilarinho; Moreira, Miguel Ângelo Lellis; Pereira, Maria Teresa Ribeiro; Fávero, Luiz Paulo Lopes; Santos, Marcos dos; Gomes, Carlos Francisco SimõesPersonnel selection is increasingly proving to be an essential factor for the success of organizations. These issues almost universally involve multiple conflicting objectives, uncertainties, costs, and benefits in decision-making. In this context, personnel assessment problems, which include several candidates as alternatives, along with several complex evaluation criteria, can be solved by applying Multicriteria Decision Making (MCDM) methods. Uncertainty and subjectivity characterize the choice of personnel for missions or promotions at the military level. In this paper, we evaluated 30 Brazilian Navy officers in the light of four criteria and 34 subcriteria. To support the decision-making process regarding the promotion of officers, we applied the ELECTRE-Mor MCDM method. We categorized the alternatives into three classes in the modeling proposed in this work, namely: Class A (Promotion by deserving), Class B (Promotion by seniority), and Class C (Military not promoted). As a result, the method presented 20% of the officers evaluated with performance corresponding to class A, 53% of the alternatives to class B, and 26.7% with performances attributed to class C. In addition, we presented a sensitivity analysis procedure through variation of the cut-off level λ, allowing decision-making on more flexible or rigorous scenarios at the discretion of the Naval High Administration. This work brings a valuable contribution to academia and society since it represents the application of an MCDM method in state of the art to contribute to solving a real problem.
- A Systematic Approach to the Management of Military Human Resources through the ELECTRE-MOr Multicriteria MethodPublication . Costa, Igor Pinheiro de Araújo; Terra, Adilson Vilarinho; Moreira, Miguel Ângelo Lellis; Pereira, Maria Teresa; Fávero, Luiz Paulo Lopes; Santos, Marcos dos; Gomes, Carlos Francisco SimõesPersonnel selection is increasingly proving to be an essential factor for the success of organizations. These issues almost universally involve multiple conflicting objectives, uncertainties, costs, and benefits in decision-making. In this context, personnel assessment problems, which include several candidates as alternatives, along with several complex evaluation criteria, can be solved by applying Multicriteria Decision Making (MCDM) methods. Uncertainty and subjectivity characterize the choice of personnel for missions or promotions at the military level. In this paper, we evaluated 30 Brazilian Navy officers in the light of four criteria and 34 subcriteria. To support the decision-making process regarding the promotion of officers, we applied the ELECTRE-Mor MCDM method. We categorized the alternatives into three classes in the modeling proposed in this work, namely: Class A (Promotion by deserving), Class B (Promotion by seniority), and Class C (Military not promoted). As a result, the method presented 20% of the officers evaluated with performance corresponding to class A, 53% of the alternatives to class B, and 26.7% with performances attributed to class C. In addition, we presented a sensitivity analysis procedure through variation of the cut-off level λ, allowing decision-making on more flexible or rigorous scenarios at the discretion of the Naval High Administration. This work brings a valuable contribution to academia and society since it represents the application of an MCDM method in state of the art to contribute to solving a real problem.