280 resultados para equações estruturais

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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Este artigo tem como objetivo identificar as práticas de gestão da cadeia de suprimentos que estão sendo adotadas no setor eletroeletrônico brasileiro e verificar se as prioridades competitivas da produção das empresas desse setor se relacionam com a adoção de tais práticas. Desenvolveu-se uma pesquisa empírica, de cunho quantitativo, a partir da realização de uma pesquisa survey por e-mail com gerentes de empresas do setor eletroeletrônico da Associação Brasileira da Indústria Elétrica e Eletrônica. Técnicas estatísticas descritivas e multivariadas de segunda geração (modelagem de equações estruturais) foram empregadas para analisar os dados obtidos. Como principais resultados deste artigo destacam-se: a) as práticas de gestão da cadeia de suprimentos que estão sendo mais implantadas são voltadas à integração e apoio das atividades de desenvolvimento de produtos com os clientes; e b) não foram verificadas relações significativas entre as prioridades competitivas das empresas estudadas e a adoção de práticas de gestão da cadeia de suprimentos.

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Pós-graduação em Engenharia de Produção - FEB

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This paper presents some results from a study of undergraduate students from different regions of the State of São Paulo that sought to better understand the relationships between society and perceptions and attitudes towards technological development. Noting that the media, academia and official documents regulating education understand and present the technology in a distinct and often contradictory ways, this paper seeks to review existing literature on the different ways to conceptualize this term, and thereafter, to develop a Likert' scale for mapping the concepts of students. Using the confirmatory analysis of structural equation modeling, this research concludes that the sample studied shows a classical view, but outdated, what means technology, by linking it to science and technology without distinction or critical viewpoints.

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A gestão de recursos humanos é frequentemente apontada como uma variável que influencia positivamente no desempenho das organizações. Enquanto argumentos e proposições teóricas de teor similar se multiplicam na literatura especializada, ainda são raras as pesquisas que lançam luzes sobre essa relação para empresas brasileiras. Nesse sentido, foi realizada uma pesquisa com o objetivo de verificar, empiricamente, se a gestão de recursos humanos influencia de maneira positiva o desempenho de empresas do segmento de autopeças e componentes automotivos em suas operações. Metodologicamente, realizou-se um survey com 75 empresas do setor mencionado, cujos dados foram analisados por meio de modelagem de equações estruturais, uma análise multivariada de segunda geração. A principal hipótese da pesquisa foi confirmada, revelando que, de fato, a gestão de recursos humanos está positivamente relacionada com o desempenho operacional das empresas analisadas.

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Argumentos de que a gestão ambiental pode se relacionar positivamente com o desempenho operacional das empresas vêm se propagando pela literatura especializada desde a década de 1990. Esses argumentos ficaram conhecidos como abordagem verde e competitiva ou Hipótese ganha-ganha, de que tanto o Meio Ambiente quanto as empresas se beneficiariam com a adoção de práticas de gestão ambiental. Entretanto, há uma lacuna sobre tal temática, que carece de evidências empíricas que validem ou refutem tais argumentos para a realidade brasileira. Por isso, esta pesquisa tem o objetivo de verificar empiricamente, se a gestão ambiental influencia positivamente o desempenho das operações de empresas do setor automotivo brasileiro, com foco no segmento de autopeças e componentes automotivos. Metodologicamente, realizou-se um survey com 75 empresas do setor mencionado, cujos dados foram analisados por meio de Modelagem de Equações Estruturais, uma análise multivariada de segunda-geração. Os principais resultados indicam que a adoção de práticas de gestão ambiental se relaciona positivamente com o desempenho operacional das empresas analisadas, confirmando a hipótese da pesquisa. Entretanto, a gestão ambiental explica o desempenho operacional com intensidade fraca, o que pode indicar que há outras variáveis de gestão organizacional influenciando o desempenho operacional das empresas, merecendo pesquisas futuras.

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Arguments that lean manufacturing can positively relate with the operational performance of companies have been spreading the literature since the 1990s. However, there is a theoretical and empirical gap on this issue that needs further empirical evidence to validate or refute these arguments to the Brazilian reality. Hence, this research aims to, empirically, verify if the lean manufacturing positively influences the performance of the operations of companies in the Brazilian automotive industry, focusing on the segment of automotive parts and components. Methodologically, we carried out a survey of 75 companies in the mentioned sector. The data were analyzed using Structural Equation Modeling, a second-generation multivariate analysis. The main results of this research are: in fact, lean manufacturing positively affects the operational performance of the studied companies, validating the main hypothesis stated in this article, but this relation is just considered weak, although positive; all lean manufacturing practices analyzed were encountered in the reality, especially for the variable continuous improvement, with the highest average and the correlation between the adoption of Kanban and Just in Time; the operational performance construct has some practices/measures identified by the literature, which have not been validated by the studied sector, as innovation (new products) and quality.

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The aim of this paper is to verify whether the practices of human resource management have a positive influence on the adoption of lean manufacturing practices in Brazilian companies in the automotive sector. To this aim, we proposed a framework linking these concepts to the proposed research hypothesis. Data collected from 75 companies were analyzed using structural equation modeling. The research demonstrates that human resource management indeed tends to influence the adoption of lean manufacturing practices in a weak-moderate manner.

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Pós-graduação em Engenharia de Produção - FEB

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A growing number of companies is adopting quality management systems to achieve better performance and remain competitive in the market. These systems, however, can prove quite complex because they involve different practices and factors. This paper seeks to identify and analyze how each of these factors and practices, defined as quality constructs, influence the performance and competitiveness in the organizational environment and thus contribute to the strategic decisions in the area of quality. To achieve that, a survey was conducted with industrial companies located in the state of São Paulo, and the data was analyzed by a structural equation software. As a result, it was observed that the constructs Customer Focus and Human Resources are the most influent for the competitive criteria of a company, while the constructs Supplier development and Customer Focus exert greater impact on performance

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The objective of this research is to examine if the environmental management evolution is positively related towards the adoption of green supply chain management practices (GSCM) by companies in the electronics sector in Brazil. To reach this objective, a quantitative research was conducted by survey with 100 companies in the electronics sector in Brazil. The collected data were processed using descriptive statistics, Exploratory Factor Analysis and Structural Equation Modeling. The most important results are: in the sample, GSCM practices to the recovery of investment, as the resale of scrap and other waste materials, and the adequacy with legislation and auditing, obtained high scores; and research hypothesis (H1) was confirmed and considered statistically valid, indicating that, in fact, the evolution of environmental management influences the adoption of GSCM practices.

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Pós-graduação em Ciência e Tecnologia de Materiais - FC

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Any failure process that may occur in a part probably is located where the stress exceeded the level of resistance. When a part or component has a sharp change in geometry, such as slots, holes, grooves, bumps or other irregularities, there is an increased concentration of stress at a specific location of the part. The objective of this study is to determine the maximum stresses in structural parts and components using the equations of elasticity theory in conjunction with the stress concentration factor experiment and compare them with results obtained by finite element method

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The objective of this work was to determine the crude protein requirements for broiler breeder pullets, using the factorial method. The protein requirements for maintenance were obtained by comparative slaughter technique and also by nitrogen balance technique, as usual. In the case of comparative slaughter technique we have examined the nitrogen retained as function of different nitrogen intake levels (ad libitum, 54, 24 and 19% of the ad libitum). For the nitrogen balance technique it has been investigated the nitrogen balance as function of nitrogen intake, at different protein levels (16, 10 6 and 3% CP). The results obtained were 3.77 and 2.02 CP/kg(0.75)/day for comparative slaughter and nitrogen balance techniques, respectively. The protein requirements for weight gain were achieved by weekly following the nitrogen level in the body, during the period from 3 to 20 weeks of age. The results were 350, 406 and 463 mg of CP/g of gain in the phases of 3 to 8, 9 to 14 and 15 to 20 weeks, respectively.