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Construção de um modelo de identificação e manutenção da rastreabilidade dos custos de avaliação de uma empresa do setor dos semicondutores
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A presente dissertação teve como objetivo desenvolver um modelo capaz de identificar, quantificar e reduzir os custos associados às atividades de avaliação da qualidade numa empresa do setor dos semicondutores. Partindo de estimativas financeiras genéricas e desagregadas, foi implementado um projeto com enquadramento Seis Sigma, seguindo a metodologia DMAIC, para garantir uma abordagem estruturada à análise do problema. Pela
primeira vez, foi calculado o custo de avaliação por produto e processo, revelando valores superiores aos padrões de referência do grupo. Esta análise foi aplicada a três produtos representativos da organização. Com base na informação recolhida, foram propostas soluções de racionalização dos planos de controlo, assentes em critérios técnicos de elegibilidade e na introdução de modelos de amostragem mais adequados à realidade produtiva. Neste contexto, foi desenvolvido o Plano de Controlo de Processo de Alta Performance (PCP-AP). A avaliação do
impacto económico deste plano, através de simulações em diferentes cenários, evidenciou o seu potencial para reduzir os custos de avaliação em mais de 20%. Por fim, foram delineadas propostas para garantir a sustentabilidade das melhorias identificadas, reforçando a importância de integrar critérios técnicos e económicos na gestão da qualidade e de promover uma revisão contínua dos planos de controlo em ambiente industrial.
This dissertation aimed to develop a model capable of identifying, quantifying, and reducing the costs associated with quality assessment activities in a company from the semiconductor industry. Starting from generic and disaggregated financial estimates, a Six Sigma project was implemented, following the DMAIC methodology to ensure a structured approach to problem analysis. For the first time, the cost of quality assessment was calculated by product and process, revealing values above the group’s reference standards. This analysis focused on three representative products of the organization. Based on the information collected, solutions for the rationalization of control plans were proposed, grounded in technical eligibility criteria and the introduction of sampling models better suited to the production reality. In this context, the High-Performance Process Control Plan (PCP-AP) was developed. The economic impact of this plan, evaluated through simulations in different scenarios, demonstrated its potential to reduce quality assessment costs by more than 20%. Finally, proposals were outlined to ensure the sustainability of the identified improvements, reinforcing the importance of integrating technical and economic criteria into quality management and promoting the continuous review of control plans in an industrial environment.
This dissertation aimed to develop a model capable of identifying, quantifying, and reducing the costs associated with quality assessment activities in a company from the semiconductor industry. Starting from generic and disaggregated financial estimates, a Six Sigma project was implemented, following the DMAIC methodology to ensure a structured approach to problem analysis. For the first time, the cost of quality assessment was calculated by product and process, revealing values above the group’s reference standards. This analysis focused on three representative products of the organization. Based on the information collected, solutions for the rationalization of control plans were proposed, grounded in technical eligibility criteria and the introduction of sampling models better suited to the production reality. In this context, the High-Performance Process Control Plan (PCP-AP) was developed. The economic impact of this plan, evaluated through simulations in different scenarios, demonstrated its potential to reduce quality assessment costs by more than 20%. Finally, proposals were outlined to ensure the sustainability of the identified improvements, reinforcing the importance of integrating technical and economic criteria into quality management and promoting the continuous review of control plans in an industrial environment.
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Cost of Quality Quality Assessment Semiconductors Six Sigma DMAIC Sampling Custos da qualidade Avaliação da qualidade Semicondutores Seis sigma Plano de controlo