Guilherme Silveira Martins

Gestão de operações no Brasil: uma análise do campo científico a partir da rede social de pesquisadores

Este estudo analisa a rede de pesquisadores que publicam no campo de Gestao de Operacoes no Brasil, baseando-se em 2.668 artigos publicados entre 1997 a 2009. As hipoteses do estudo sao referenciadas na literatura de redes sociais e de avaliacao de campos cientificos. Os resultados apontam que, apesar da existencia de uma rede fragmentada e pouco densa, ha grupos coesos e proximos que dao estabilidade ao campo (redes small worlds). Verificou-se que o numero de lacos do pesquisador (centralidade de grau) esta positivamente associado ao numero de artigos publicados, embora afete negativamente sua produtividade. Quando consideramos os lacos nao redundantes (structural holes), os resultados se mostraram positivos e significativos tanto para a producao quanto para a produtividade. Ademais, observou-se ainda que a centralidade do pesquisador modera o efeito dos lacos nao redundantes, sendo seu efeito sobre a produtividade maior entre pesquisadores com maior grau de centralidade.

Service's scientific community: a social network analysis (1995‐2010)

Purpose – The purpose of this paper is to characterize and discuss the collaborative network formed by researchers that published about services in the top journals in Operations, Marketing, and Human Resources Management, and provide further comparison with major Service journals.Design/methodology/approach – The method used was designed documentary research using papers published in the top three relevant international journals specific to Operations, Marketing, and Human Resources from 1995 to 2010. Papers were selected using a search of the ABI/Inform Global (Proquest) database on the word “service” in the title, abstract, or keywords. Additionally, it included two major Service journals. A total of 1,481 papers and 2,457 authors composed the Social Network Analysis (SNA).Findings – The co‐authorship network revealed that the social structure is highly fragmented. However, its main component can be classified as “small world”, indicating that authors are connected to others outside their group through...

Empowering IT entrepreneurships: what's the contribution of business incubators?

Este artigo tem como tema a analise da contribuicao das incubadoras para o desenvolvimento de empreendimentos em TI, sendo entao realizado um estudo em profundidade nas 3 incubadoras especializadas em TI do Estado de Minas Gerais. Gerentes das incubadoras e empresarios incubados e ja graduados foram entrevistados a respeito da estrutura e do apoio oferecidos pelas incubadoras, interacao com universidades e centros de pesquisa, e sobre a capacitacao gerencial oferecida aos empresarios. Os resultados apontam para a necessidade de uma atuacao mais proficua das incubadoras, fundamentalmente na prospeccao de clientes, busca por recursos financeiros e relacionamento com universidades e centros de pesquisa, principalmente no que tange a transferencia de tecnologia.

Gestão do transporte orientada para os clientes: nível de serviço desejado e percebido

Transport management is traditionally addressed in the literature as a process with its flow contextualized in its operating performance and costs. In this paper, transport is considered as service management, seeking to understand the behavioral aspects of the demand of shippers. We conducted a survey of 400 small and medium-sized Brazilian industrial shippers. The differentiation of services, according to the customers, was obtained by Factor Analysis. The results indicated that the constructs of transport services most valued by shippers were, in order, Security, Reliability, Time, Price, Service for the special needs of customers and Customer Relations, i.e., the shippers showed greater interest in the effectiveness of service. Thus, shippers expect the performance of transport in itself to strengthen the relationship with their customers. Additionally, we detected differences in priorities, according to the groups targeted by the characteristics of customers. The importance attached to the constructs of Security and Reliability can also help understand why many companies maintain their own fleet or establish contracts for the transport of their products.

Strategic outsourcing? The Philips case in the LCD TV Market

This work seeks to assess the outsourcing process adopted by Philips for producing LCD televisions. The authors used the Resource-based Theory and the Transaction Cost Theory for analyzing the case. Based on industry data and interviews with ten of the company’s senior executives, this study sought to understand how the decision making process was carried out and how it affected the company’s activities in the field of LCD televisions. Philips has lost its competitiveness in the Brazilian market – it went from being the leader in 2006 to fourth place in 2009, both as far as regards its sales volume and value. The executives pointed out that the LCD panel is an important resource and that its supply by third parties represented a high transaction cost. The results illustrate the complementarity that exists between the RBT and TCT theories in a competitive environment that has few players.

Supply chain relationships: exploring the effects of both relational and structural embeddedness on operational performance

Few studies approach supply chain relationships from the perspective of integration with customers and suppliers at the same time. In this paper the effects of both relational and structural embeddedness with suppliers and buyers on operational performance were evaluated in terms of productivity and quality. Hypotheses were tested by hierarchical linear regression models (OLS models) with a sample of Brazilian furniture firms. The results showed that relational embeddedness alone has positive effect only on quality, and paradoxically, higher levels of relational embeddedness lead to a reduction of the effect of structural embeddedness. One implication of the results involves the recognition that higher levels of trust and cooperation do not always lead to more benefits or greater levels of operational performance. If isolated from other governance mechanisms, these can even lead to the loss of one of the parties, reinforcing the idea that relational and structural embeddedness are complementary governance mechanisms.

IMERSÃO SOCIAL NA CADEIA DE SUPRIMENTOS E SEU EFEITO PARADOXAL NO DESEMPENHO OPERACIONAL

This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness trust and solidarity reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness - trust and solidarity - reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.

Inmersión social en la cadena de suministros y su efecto paradójico en el desempeño operativo

This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness trust and solidarity reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness - trust and solidarity - reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.

Social embeddedness in supply chain and its paradoxical impact on operation performance

This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness trust and solidarity reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated furniture companies and its customers and suppliers ties. Specifically, we analyze how relational embeddedness - trust and solidarity - reinforces structural embeddedness, which was evaluated from outsourcing costs and sales concentration. Our results point out that customers’ relational embeddedness improves quality performance, whereas with suppliers leads to productivity gains. We found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.

Imersão Social na Cadeia de Suprimentos e Seu Efeito Paradoxal no Desempenho Operacional (Social Embeddedness in Supply Chain and Its Paradoxical Effect on Operational Performance)

Portuguese Abstract: O objetivo deste artigo e analisar os efeitos da imersao relacional e estrutural no desempenho operacional em termos de ganhos de produtividade e qualidade. Assim, investigamos 75 industrias moveleiras, e seus lacos com clientes e fornecedores. Especificamente, analisamos como a imersao relacional, em termos de confianca e solidariedade, reinforca a imersao estrutural, que foi avaliada a partir da margem de custos com fornecedores e da concentracao de vendas. Nossos dados apontam para maior influencia da imersao relacional com clientes na qualidade, enquanto que a imersao relacional com fornecedores e mais sensivel a produtividade. Adicionalmente, encontramos dois efeitos paradoxais. Enquanto que no primeiro, niveis baixos de confianca e solidariedade nos fornecedores gera efeito negativo da imersao estrutural na produtividade, em niveis mais altos esses efeitos sao positivos. No segundo, a contradicao reside no efeito positivo da combinacao dos dois tipos de imersao na produtividade, mas negativo na qualidade. English Abstract: This paper aims to analyze structural and relational embeddedness effects in operational performance in terms of productivity and quality gains. We investigated 75 furniture companies, and its customers and suppliers ties. Specifically, we analyze how relational embeddedness, in terms of trust and solidarity, reinforces structural embeddedness, which was evaluated from margin costs with suppliers and sales concentration. Our results point out that relational embeddedness with customers improves manufacturing quality, whereas with suppliers leads to productivity gains. Additionally, we found two paradoxical effects. First, lower levels of trust and solidarity generates negative effect on suppliers of structural embeddedness in productivity, but at higher levels these effects are positive. Second, the contradiction can be observed when we found a positive effect of two types of immersion combination in productivity, but negative on quality.