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Advisor(s)
Abstract(s)
A necessidade de aumentar a disponibilidade operacional tem sido nos últimos tempos um tema com bastante atenção por parte da academia, mas também, e principalmente, pela indústria, devido aos requisitos subjacentes ao que as empresas procuram para sustentarem e expandirem o seu negócio, isto é, aumento da produtividade, da qualidade, e da competitividade. Apesar dos investimentos, as empresas não têm verificado grande aumento da disponibilidade dos seus equipamentos. Tratar da disponibilidade operacional é considerar aspetos importantes da manutenção e da produção como cultura do chão de fábrica, recursos humanos e materiais, gestão coordenada de ativos físicos ou aquisição e partilha de conhecimento.
A disponibilidade operacional é afetada pelos aspetos inerentes e decorrentes da aplicação, manutenção e uso do equipamento, e pelas particularidades da sua conceção e fabrico, sendo largamente condicionada por fatores com interferência direta como a sua operação e planeamento de produção, as ações de manutenção envolvendo o planeamento das suas atividades, a gestão dos seus recursos e das peças de reposição, o tipo de manutenção envolvido, e também pela formação, fiabilidade humana e envelhecimento do próprio equipamento.
Assim, é foco deste trabalho, apresentar uma metodologia que, recorrendo à aplicação das ferramentas Analytic Hierarchy Process (AHP) e Análise de Modos de Falha e seus Efeitos (FMEA), quantifique a influência direta de oito fatores na disponibilidade operacional de um equipamento.
Demonstrou-se a metodologia numa linha de corte de fita de aço encontrando desta forma os fatores que de modo efetivo estão a afetar o desempenho do equipamento, fornecendo assim à manutenção uma informação muito importante para a otimização da sua gestão e para a melhoria da qualidade das suas atividades.
The need to increase operational availability has been an issue that is focusing attention not only by the Academy, but also and especially by the industry due to the underlying requirements for companies to support and expand their business, namely to increase productivity, quality and competitiveness. Despite the investment organizations have not seen a large increase in the availability of their equipment. To deal with operational availability it is necessary to consider important aspects of maintenance and production as shop floor culture, human and material resources, coordinated management of physical assets or the acquisition and sharing of knowledge. The operational availability is affected by inherent and arising aspects from the implementation phase, maintenance and use of the equipment, and the specificities of its design and manufacture, being largely conditioned by factors with direct interference as production planning and operation, maintenance actions involving the planning of its activities, the management of resources and spare parts, the type of maintenance involved, and also by training, human reliability, and equipment ageing. Thus, the focus of the present work is to present a methodology, using the Analytic Hierarchy Process (AHP) and Failure Mode and Effects Analysis (FMEA) that is able to quantify the direct influence of eight factors in the operational availability of the equipment. The methodology was applied in a steel coil shear line to find the factors that in an effective way are affecting the performance of the equipment, providing the maintenance with very important information for management optimization and for improving the quality of its activities.
The need to increase operational availability has been an issue that is focusing attention not only by the Academy, but also and especially by the industry due to the underlying requirements for companies to support and expand their business, namely to increase productivity, quality and competitiveness. Despite the investment organizations have not seen a large increase in the availability of their equipment. To deal with operational availability it is necessary to consider important aspects of maintenance and production as shop floor culture, human and material resources, coordinated management of physical assets or the acquisition and sharing of knowledge. The operational availability is affected by inherent and arising aspects from the implementation phase, maintenance and use of the equipment, and the specificities of its design and manufacture, being largely conditioned by factors with direct interference as production planning and operation, maintenance actions involving the planning of its activities, the management of resources and spare parts, the type of maintenance involved, and also by training, human reliability, and equipment ageing. Thus, the focus of the present work is to present a methodology, using the Analytic Hierarchy Process (AHP) and Failure Mode and Effects Analysis (FMEA) that is able to quantify the direct influence of eight factors in the operational availability of the equipment. The methodology was applied in a steel coil shear line to find the factors that in an effective way are affecting the performance of the equipment, providing the maintenance with very important information for management optimization and for improving the quality of its activities.
Description
Trabalho final de mestrado para a obtenção de grau de mestre em Engenharia Mecânica
Keywords
Disponibilidade Availability FMEA/FMECA AHP Manutenção Maintenance Operação Operation
Citation
CARVALHO, António Joaquim de Oliveira de - Análise da influência das atividades de operação e manutenção na disponibilidade operacional de um ativo físico. Lisboa: Instituto Superior de Engenharia de Lisboa, 2019. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa