Control Charts For Attributes
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Indicadores críticos da manufatura de pisos de madeira maciça / Critical indicators applied to manufacture of solid wood flooring
The implementation of quality programs in line production has been used by companies to guarantee the competitiveness in a market more competitive every day. The search for balance between quality and costs is a constant in industrial area and, in this context, improvements in the productive process are fundamentals. In the forest sector, responsible for 3,5
Publicado em: 2010
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2. Ferramentas para modelagem e monitoramento de características de qualidade do tipo fração / Tools for modelling and monitoring of the type fraction quality characteristics
Esta tese apresenta a modelagem e o monitoramento de características de qualidade do tipo fração, que apresentam valores restritos ao intervalo [0,1] A motivação inicial é que a característica de qualidade do tipo fração pode ser melhor aproximada pela distribuição de probabilidade Beta e, geralmente, a modelagem e o monitoramento utilizados não
Publicado em: 2010
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3. MÉTODOS ESTATÍSTICOS APLICADOS À AVALIAÇÃO DA QUALIDADE DA MATÉRIA-PRIMA E CLASSIFICAÇÃO DOS FORNECEDORES DE UMA INDÚSTRIA DE LATICÍNIOS / STATISTICAL METHODS APPLIED TO THE QUALITY ASSESSMENT OF RAW MATERIALS AND CLASSIFICATION OF SUPPLIERS OF A DAIRY INDUSTRY
The aim of this study was to evaluate the quality of raw materials delivered by suppliers of a dairy industry based on physicochemical specifications. The development of the work consisted of literature research, followed by a case-study with descriptive approach involving variables of quantitative nature. In order to develop the analysis of data, the follow
Publicado em: 2009
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4. Statistical measurement and analysis for software process improvement / MediÃÃo e AnÃlise EstatÃstica na Melhoria de Processos de Software
Based on the premise that the quality of a software product is mostly the result of the quality of the process in which it is developed, models for the improvement of the process of software have been established as the essencial part of some efforts, including governments, universities and industries from different countries trying to change the condition o
Publicado em: 2006
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5. DOUBLE-SAMPLING CONTROL CHARTS FOR ATTRIBUTES / GRÁFICOS DE CONTROLE POR ATRIBUTOS COM AMOSTRAGEM DUPLA
In this thesis, it is proposed the incorporation of the double-sampling strategy, used in lot inspection, to the np control chart (control chart for the number nonconforming), with the purpose of improving its efficiency, that is, reducing the out-of-control average run length (ARL1), without increasing the average sample size (ASS) or the in-control average
Publicado em: 2005
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6. GRÁFICO DE CONTROLE EWMA PARA NÃO-CONFORMIDADES COM INTERVALO DE TEMPO ENTRE AMOSTRAS VARIÁVEL / EWMA CONTROL CHART FOR NONCONFORMITIES WITH VARIABLE SAMPLING INTERVAL
The process control charts created by Shewhart in the 20`s and still in use today are efficient in signaling large shifts in the quality characteristics of a process (e.g. shifts greater than two standard deviations, in the case of the chart for means); they are however slower in the case of small and moderate shifts, in which case CUSUM and EWMA schemes are
Publicado em: 2004
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7. GRÁFICOS ADAPTATIVOS DE CONTROL DE PROCESO POR ATRIBUTOS / GRÁFICOS ADAPTATIVOS DE CONTROLE DE PROCESSO POR ATRIBUTOS / ADAPTIVE CONTROL CHARTS FOR ATTRIBUTES
It is important to investigate ways to improve the efficiency of the statistical control charts for attributes, because the controls for attributes typically require very large sample sizes for quick detection of changes in the process, and these sample sizes can be extremely undesirable or eventually unfeasible in many practical situations. The adaptive sch
Publicado em: 2000