Gauge capability studies for attribute data

Lyu, JrJung; Chen, Ming Nan

doi:10.1002/qre.868

Cited by 14 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sob o mesmo ponto de vista, dentre os métodos aplicados junto ao GR&R, o ANOVA é amplamente utilizado em trabalhos como [21,[25][26]29,[34][35][36][37][38][39][40][41]. Alguns estudos recentes também realizam análise do sistema de medição no processo de RSW como [11,[42][43][44].…”

Section: /504unclassified

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Almeida

Gomes

et al. 2018

Soldag. insp.

View full text Add to dashboard Cite

Resumo Neste estudo, buscou-se analisar a variabilidade de instrumentos utilizados na indústria para avaliar as características geométricas de um ponto de solda. Para tal, inicialmente, utilizou-se da técnica de planejamento de experimentos para gerar um arranjo fatorial fracionado para as configurações dos parâmetros de soldagem em corpos de prova de aços galvanizados por imersão a quente, a fim de representar a amplitude real do processo de soldagem por pontos. Para as análises, utilizou-se o estudo de repetitividade e reprodutibilidade (GR&R), pelo método de análise de variância, para identificar os componentes de variação do sistema de medição avaliando três instrumentos distintos, comparando as medições realizadas por um analisador de imagens, a partir do ensaio metalográfico, e métricas de instrumentos convencionais de metrologia como o relógio apalpador e o paquímetro manual. Foram avaliadas duas características da qualidade, sendo elas: a profundidade de indentação e o diâmetro do ponto. A partir dos resultados foi possível verificar que o analisador de imagem apresentou uma menor variabilidade nas medições, caracterizando-se como a melhor escolha para as medições das respostas de qualidade do processo de solda por pontos apresentando um GR&R classificado como aceitável.

show abstract

Section: /504unclassified

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Almeida

Gomes

et al. 2018

Soldag. insp.

View full text Add to dashboard Cite

show abstract

“…In addition, at least three inspectors are required to ensure that variance and mean square error is not too large. Lyu and Chen [33] used a generalized linear model (GLM), iterative weighted least squares (IWLS), andrepeatability variance to develop a statistical method for calculating variance between measurement systems, which is used to calculate the reproducibility variance. A simplified table provides a reference for actual operation in industry.…”

Section: Measurement Of Gauge Repeatability and Reproducibilitymentioning

confidence: 99%

Using Fuzzy Theory in %GR&R and NDC of Measurement System Analysis

Yeh¹,

Pai²,

Huang³

2015

ENG

View full text Add to dashboard Cite

ISO9001:2000 and TS 16949 have become the major quality system management models in present traditional and Hi-tech industries. The Measurement System Analysis (MSA) Reference Manual, on the other hand, is one of the core tools in ISO/TS 16949. MSA aims to evaluate Gauge Repeatability and Reproducibility (GR&R) where the control, monitoring, and maintenance of the measurement process are required in measurement systems so that the measurement capability could be ensured under statistical control. An ideal measurement system should present the statistical characteristic of zero error on any measured product. Nevertheless, such an ideal measurement system hardly exists. Managers therefore have to adopt such measurement systems with unsatisfactory statistical characteristics. Traditional MSA indexes are constructed with definite observed values. Nevertheless, measurements with observed values are not entirely error-free. For this reason, this study proposes to research three cases in a case company and apply the integration of Fuzzy Theory and GR&R to discuss the differences in the evaluation index GR&R and the Number of Distinct Categories (NDC). Substituting fuzzy numbers for definite numbers found that the data of %GR&R were increased and NDC was decreased after fuzzification. Such results verify that the fuzzified %GR&R and NDC become stricter in the determination criterion. The research outcomes could assist the case company in improving the reference data of measurement systems and promoting the measurement quality.

show abstract

“…A reasonable starting value is a slightly positive value for VBMS (0) , such as 10 -8 [25]. The values of D ð0Þ and G ð0Þ can be obtained by equation (15) and (16).…”

Section: Variance Between Measurement Systemsmentioning

confidence: 99%

Enhancement of measurement capability for precision manufacturing processes using an attribute gauge system

Chen

Lyu

2011

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

This research discusses precision manufacturing processes that have near-zerodefect manufacturing environments with occasional non-conformities in some samples when random shocks arise. Repeatability variance and reproducibility variance are commonly used to assess measurement precision, but they may fail to estimate measurement parameters in precision manufacturing processes. This paper proposes a novel attribute gauge system that consists of five modules. The measurement parameters estimation module derives equations for the random shock probability and measurement parameters using the Expectation-Maximization algorithm and zero-inflated Poisson model. The variance between measurement systems module derives the equation of variance within operators and gauges from the laboratory component of the bias. The repeatability variance module derives a repeatability measurement equation and the reproducibility variance module derives the reproducibility measurement equation using the ASTM E691 standard. Finally, the measurement system acceptability criteria module derives a measurement capability index and assesses measurement precision based on the ASTM F1469 standard. A thin-film transistor liquid crystal display manufacturing case study is used to illustrate the process and potential of the proposed system. Findings can be used as a reference for evaluating measurement systems with attribute data. Analytical results are also useful to quality practitioners attempting to improve measurement system effectiveness.

show abstract

Gauge capability studies for attribute data

Cited by 14 publications

References 28 publications

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Using Fuzzy Theory in %GR&R and NDC of Measurement System Analysis

Enhancement of measurement capability for precision manufacturing processes using an attribute gauge system

Contact Info

Product

Resources

About

Gauge capability studies for attribute data

Cited by 14 publications

References 28 publications

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Using Fuzzy Theory in %GR&amp;R and NDC of Measurement System Analysis

Enhancement of measurement capability for precision manufacturing processes using an attribute gauge system

Contact Info

Product

Resources

About

Using Fuzzy Theory in %GR&R and NDC of Measurement System Analysis