Proposta de fluxograma orientativo para aplicação de índices de capacidade

Souza, Fernanda Timm Seabra; Pedrini, Danilo Cuzzuol; Caten, Carla Schwengber ten

doi:10.1590/0104-530x496-13

Cited by 3 publications

(4 citation statements)

References 29 publications

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“…Control charts are the main statistical methods of SPC for analyzing data from sampling, replacing the mere detection and correction or exchange of defective products by the study and prevention of problems related to quality, aiming to prevent defective products from being produced (Souza et al, 2014). A process is under statistical control or stable when the variability is associated only with random causes.…”

Section: Introductionmentioning

confidence: 99%

“…For all of them, process stability and normality of the random variable are required. Souza et al (2014) reported that, depending on the index used, the conclusions about the process capability can be differentiated, demonstrating the importance of choosing appropriate capability indices according to the behavior of each process.…”

Section: Introductionmentioning

confidence: 99%

“…Given the importance of capability indices for CEP, several authors have compared capability indices, described guidelines for their use, analyzed theory and practice, among other studies. Some important references are: Pearn et al (1992), Kushler & Hurley (1992), Kotz et al (1993), Vannman (1995), Pearn et al (1998), Stoumbos (2002), Parchami & Mashinchi (2007), Wu et al (2009), Miao et al (2011), Souza et al (2014, Álvarez et al (2015) and Wang et al (2021).…”

Section: Introductionmentioning

confidence: 99%

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Consistencies of the capability indices based on the normal probability distribution

et al. 2023

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Capability analysis seeks to estimate the probability that a process will produce compliant products. The capability indices are dimensionless parameters that measure how well the process can meet specifications. In the literature, eight capability indices are listed, among others, considering a stable process under statistical control and based on the normal probability distribution, defined by: Cp, Pp, Cpk, Ppk, Cpm, Ppm, Cpmk, and Ppmk. Basically, the index formulas differ in the calculations of the variability within and total, and of the shifts of the mean in relation to the nominal value and the nearest specification limit. The objective of this article was to compare these capacity indexes, and for that, it was chosen the most consistent estimator, that is, the one that improved the accuracy and efficiency as the number of observations increased. Thus, a simulation of 30,000 values of a normal random variable with a mean equal to zero and a standard deviation equal to one was performed. This made it possible to sample this process 1,000 times using 5, 10, 15, 20, 25, and 30 rational subgroups with individual observations or sample elements. Subsequently, 20 mean shifts were provoked, with values ranging from 0.1 to 2 and varying by 0.1 unit. According to the results, it was concluded that the indexes Cpk and Ppk were the most consistent in presenting higher accuracy and efficiency for at least 15 rational subgroups or sample elements, regardless of the magnitude of the mean displacement in relation to the nominal value.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Consistencies of the capability indices based on the normal probability distribution

et al. 2023

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“…According to specialized scientific literature, studies such as those by Müller et al (2010), Carvalho et al (2013), Schwaab et al (2013), Souza et al (2014) and Schimitz et al (2014), among others, show that the use of process management methodologies is up-to-date and aims at increasing organizational performance and competitiveness.…”

Section: Introductionmentioning

confidence: 99%

Using the view of Business Process Management (BPM) for process improvement in the shipping industry and offshore construction sector: a case study of the Rio Grande (RS) naval pole

et al. 2019

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The current study describes the mapping and analysis processes of a company in the Brazilian shipbuilding and offshore construction sectors, according to Business Process Management assumptions. As for methodology, applied research using a case study, where semi-structured interviews were conducted as data collection tools. As for the interview scripts, six process parameters were established and used for data collection, which was of qualitative nature. Creation of the flowchart, resorted to the standard flowgram tool ANSI, this allowed for detailed viewing of the activities that compose the process as well as a general view of the process.

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Análise do processo produtivo e capacidade operacional de uma organização de coleta seletiva de resíduos sólidos – estudo de caso asnov garanhuns

Feitosa

Silva

2018

Revista PO: R. Eletr. de Eng. de Produção e Correlatas

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Gerenciar adequadamente um processo produtivo é determinante para alcançar os objetivos organizacionais, porém a ausência de conhecimento técnico torna essa gestão desafiadora e leva a resultados aquém do que a organização poderia obter. Associações e cooperativas de catadores de materiais recicláveis, bastante relevantes na implantação da gestão integrada de resíduos, através da Política Nacional de Resíduos Sólidos (PNRS), contam, na maior parte das vezes, com um gerenciamento incipiente de seus processos e atividades. Nesse sentido, propôs-se a análise do processo produtivo de uma organização de coleta seletiva de resíduos sólidos recicláveis e reutilizáveis, enfocando sua capacidade de absorver o volume gerado desses resíduos em sua área de atuação. Utilizou-se de questionário semiestruturado e entrevistas, construindo-se o fluxograma do processo, e de mensurações da capacidade operacional da produção. Os resultados obtidos, da organização atuante no município de Garanhuns, Pernambuco, a única a realizar coleta seletiva na cidade, demonstraram sua capacidade operacional de absorver os resíduos recicláveis e reutilizáveis gerados no município. O processo produtivo é apresentado em detalhes e sua capacidade de absorção dos resíduos ainda que pequena, contribui inegavelmente para a redução do volume considerável de resíduos destinados a aterros.

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Proposta de fluxograma orientativo para aplicação de índices de capacidade

Cited by 3 publications

References 29 publications

Consistencies of the capability indices based on the normal probability distribution

Consistencies of the capability indices based on the normal probability distribution

Using the view of Business Process Management (BPM) for process improvement in the shipping industry and offshore construction sector: a case study of the Rio Grande (RS) naval pole

Análise do processo produtivo e capacidade operacional de uma organização de coleta seletiva de resíduos sólidos – estudo de caso asnov garanhuns

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