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Abstract(s)
A dinâmica mundial pressiona cada vez mais a implementação de políticas de manutenção adequadas que permitam uma rápida e organizada resposta às necessidades organizacionais. A escassez de recurso, as limitações dos recursos humanos, elevada procura e pouca capacidade de resposta, diferentes e variadas vias logísticas são fatores modernos que podem influenciar diretamente um processo de manutenção. A manutenção tem de conseguir dar resposta a todas estas adversidades mantendo os seus equipamentos operacionais e disponíveis por forma a manter a organização competitiva no ambiente onde esta inserido. Deste modo, é necessário utilizar ferramentas, métodos e filosofias de manutenção que permitam responder a todas as carências, através dos recursos existentes, de forma eficiente e eficaz. Assim, a Failure Reporting, Analysis and Corrective Action Systems (FRACAS) apresenta-se como uma metodologia moderna que responde, na prática, às necessidades de manutenção de uma dada organização. Esta, devido ao seu cariz prático apresenta limitações na sua utilização nomeadamente no setor operacional, de planeamento, coordenação e logístico. Assim, o presente trabalho tem como objetivo identificar as limitações que a metodologia FRACAS apresenta e desenvolver uma abordagem estruturada na avaliação e gestão da fiabilidade em manutenção. Neste âmbito, foi feito recurso à filosofia Reliability Centered Maintenance (RCM) e política de manutenção Condition Based Maintenance (CBM), que sustentam a base do desenvolvimento da gestão da manutenção e fiabilidade da metodologia. Foi realizada a demonstração da metodologia proposta com recurso as bases analíticas da gestão da manutenção e da fiabilidade. Ainda, foi feita, através de modelos numéricos, uma comparação teórica entre o desempenho da metodologia convencional e a metodologia proposta. Esta aplicação permitiu retirar, teoricamente, importantes ilações que permitem sustentar o modelo proposto, bem como, o incremento da eficiência e eficácia na gestão da fiabilidade.
Global dynamics are putting increasing pressure on the implementation of appropriate maintenance policies that enable a rapid and organised response to organisational needs. Resource scarcity, human resource limitations, high demand and low response capacity, different and varied logistical routes are all modern factors that can directly influence a maintenance process. Maintenance has to be able to respond to all these adversities by keeping its equipment operational and available in order to keep the organisation competitive in its environment. It is therefore necessary to use maintenance tools, methods and philosophies that enable all the shortcomings to be met efficiently and effectively using existing resources. Failure Reporting, Analysis and Corrective Action Systems (FRACAS) is a modern methodology that responds in practice to the maintenance needs of a given organisation. Due to its practical nature, it has limitations in its use, particularly in the operational, planning, coordination and logistics sectors. The aim of this study is therefore to identify the limitations of the FRACAS methodology and to develop a structured approach to assessing and managing reliability in maintenance. In this context, recourse was made to the Reliability Centred Maintenance (RCM) philosophy and the Condition Based Maintenance (CBM) maintenance policy, which underpin the development of the methodology's maintenance and reliability management. The proposed methodology was demonstrated using the analytical bases of maintenance and reliability management. A theoretical comparison between the performance of the conventional methodology and the proposed methodology was also made using numerical models. This application made it possible to theoretically draw important conclusions that support the proposed model, as well as increasing efficiency and effectiveness in reliability management.
Global dynamics are putting increasing pressure on the implementation of appropriate maintenance policies that enable a rapid and organised response to organisational needs. Resource scarcity, human resource limitations, high demand and low response capacity, different and varied logistical routes are all modern factors that can directly influence a maintenance process. Maintenance has to be able to respond to all these adversities by keeping its equipment operational and available in order to keep the organisation competitive in its environment. It is therefore necessary to use maintenance tools, methods and philosophies that enable all the shortcomings to be met efficiently and effectively using existing resources. Failure Reporting, Analysis and Corrective Action Systems (FRACAS) is a modern methodology that responds in practice to the maintenance needs of a given organisation. Due to its practical nature, it has limitations in its use, particularly in the operational, planning, coordination and logistics sectors. The aim of this study is therefore to identify the limitations of the FRACAS methodology and to develop a structured approach to assessing and managing reliability in maintenance. In this context, recourse was made to the Reliability Centred Maintenance (RCM) philosophy and the Condition Based Maintenance (CBM) maintenance policy, which underpin the development of the methodology's maintenance and reliability management. The proposed methodology was demonstrated using the analytical bases of maintenance and reliability management. A theoretical comparison between the performance of the conventional methodology and the proposed methodology was also made using numerical models. This application made it possible to theoretically draw important conclusions that support the proposed model, as well as increasing efficiency and effectiveness in reliability management.
Description
Dissertação de natureza científica para obtenção do grau de Mestre em Engenharia Mecânica
Keywords
Failure reporting Analysis and corrective action systems Manutenção Fiabilidade Reliability centered maintenance Condition based maintenance Failure reporting Analysis and corrective action systems Maintenance Reliability Reliability centered maintenance
Citation
Santos, Marco Antero Afonso dos - Avaliação e gestão da fiabilidade em manutenção. Lisboa: Instituto Superior de Engenharia de Lisboa, 2023. Dissertação de Mestrado