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Search Results: 1 - 10 of 49830 matches for " Luis Alberto Duncan Rangel "
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Treatment of uncertainty through the interval smart/swing weighting method: a case study
Gomes, Luiz Flávio Autran Monteiro;Rangel, Luis Alberto Duncan;Leal Junior, Miguel da Rocha;
Pesquisa Operacional , 2011, DOI: 10.1590/S0101-74382011000300004
Abstract: an increasingly competitive market means that many decisions must be taken, quickly and with precision, in complex, high risk scenarios. this combination of factors makes it necessary to use decision aiding methods which provide a means of dealing with uncertainty in the judgement of the alternatives. this work presents the use of the maut method, combined with the interval smart/swing weighting method. although multicriteria decision aiding was not conceived specifically for tackling uncertainty, the combined use of maut and the interval smart/swing weighting method allows approaching decision problems under uncertainty. the main concepts which are involved in these two methods are described and their joint application to the case study concerning the selection of a printing service supplier is presented. the case study makes use of the winpre software as a support tool for the calculation of dominance. it is then concluded that the proposed approach can be applied to decision making problems under uncertainty.
GEST O DO INGRESSO UNIVERSIDADE: UM ESTUDO DE CASO
Luiz Flavio Autran Monteiro Gomes,Luis Alberto Duncan Rangel,Antonio de Ara?ojo Freitas J?onior
Revista de Administra??o FACES Journal , 2002,
Abstract: Este artigo mostra como um m todo anal -tico de apoio decis £o pode ser utilizado numa situa § £o tipicamente encontrada na gest £o de universidades: a avalia § £o de candidatos aos seus cursos. O caso aqui relatado aborda a avalia § £o dos candidatos ao curso de engenharia de produ § £o da Escola de Engenharia Industrial MetaJ orgica de Volta Redonda, no Estado do Rio de Janeiw. A an lise empregada no estudo fez uso do m todo multicrit rio UTA e de uma variante do mesmo que considera os pesos dos crit rios de avalia § £o. Os dois m todos fizeram uso de crit rios de avalia § £o tanto quantitativos como qualitativos, partindo de uma classifica § £o a priori de um subconjunto ou do pr 3prio conjunto de candidatos e da matriz de avalia § £o.Esses m todos, lidando simultaneamente com m oltiplos crit rios de avalia § £o, produziram resultados consistentes com a classifica § £o global dos candidatos provida pelo exame vestibular tradicional.
GEST O DO INGRESSO à UNIVERSIDADE: UM ESTUDO DE CASO
Luiz Flavio Autran Monteiro Gomes,Luis Alberto Duncan Rangel,Antonio de Araújo Freitas Júnior
Revista de Administra??o FACES Journal , 2002,
Abstract: Este artigo mostra como um método analítico de apoio à decis o pode ser utilizado numa situa o tipicamente encontrada na gest o de universidades: a avalia o de candidatos aos seus cursos. O caso aqui relatado aborda a avalia o dos candidatos ao curso de engenharia de produ o da Escola de Engenharia Industrial MetaJúrgica de Volta Redonda, no Estado do Rio de Janeiw. A análise empregada no estudo fez uso do método multicritério UTA e de uma variante do mesmo que considera os pesos dos critérios de avalia o. Os dois métodos fizeram uso de critérios de avalia o tanto quantitativos como qualitativos, partindo de uma classifica o a priori de um subconjunto ou do próprio conjunto de candidatos e da matriz de avalia o.Esses métodos, lidando simultaneamente com múltiplos critérios de avalia o, produziram resultados consistentes com a classifica o global dos candidatos provida pelo exame vestibular tradicional.
Emprego dos métodos Utilité Additive e Utilité Additive - CRiteria na avalia??o de imóveis: um estudo de caso
Rangel, Luís Alberto Duncan;Gomes, Luiz Flávio Autran Monteiro;
Gest?o & Produ??o , 2009, DOI: 10.1590/S0104-530X2009000200006
Abstract: this article presents an application of the uta method and its variant uta-cr to the determination of the utility functions for tackling the problem of evaluating residential real estate. both methods belong to the american school of multicriteria decision aiding. by using these methods, it is possible to determine the utility function of the criteria present in the evaluation analysis making use of previous information from the decision makers. the advantages of uta-cr method over uta are identified through the employment of the mathematical models embedded in each method. it can be observed that uta-cr method makes use of decision-makers' preferences with respect to the criteria that lead to utility functions which are as close as possible to their preferences.
An application of the TODIM method to the evaluation of Broadband Internet plans
Rangel, Luís Alberto Duncan;Gomes, Luiz Flavio Autran Monteiro;Cardoso, Felipe Parussoli;
Pesquisa Operacional , 2011, DOI: 10.1590/S0101-74382011000200003
Abstract: this article presents a case study of the evaluation of the various types of access to the broadband internet available to a small company, located in volta redonda, in the state of rio de janeiro. this small company needs to implement broadband internet in its establishment and sought an evaluation of the companies which work providing this type of service. with the aim of carrying out a technical evaluation of the provision of the broadband internet service and, considering the diverse points of view and needs of this small company, a multicriteria decision aiding method, the todim method, was used. by means of this research, the power of this operational research tool was verified in the search for the solution to the problem of ranking the services offered in the city, according to the criteria chosen by this small company.
Determina??o do valor de referência do aluguel de imóveis residenciais empregando o Método TODIM
Rangel, Luís Alberto Duncan;Gomes, Luiz Flávio Autran Monteiro;
Pesquisa Operacional , 2007, DOI: 10.1590/S0101-74382007000200009
Abstract: setting rent reference values for residential housing units is normally performed under multiple, conflicting criteria. this article shows how the todim method of multicriteria decision aiding can be of a significant help in that task. a case study was carried through in the city of volta redonda, in the state of rio de janeiro, brazil. the todim method allows considering quantitative as well as qualitative evaluation criteria and is founded on prospect theory. in order to obtain a maximum adherence of rent reference values to market values, some housing units that had just been rent were taken into account in the study. the application of the todim method produced the ordering of all such housing units and then led to identifying ranges for rent. a sensitivity analysis complemented the study by providing useful insights on the numerical results that were obtained.
Decision theory with multiple criteria: an aplication of ELECTRE IV and TODIM to SEBRAE/RJ
Rangel, Luís Alberto Duncan;Gomes, Luiz Flávio Autran Monteiro;Moreira, Rogério Amadel;
Pesquisa Operacional , 2009, DOI: 10.1590/S0101-74382009000300007
Abstract: this paper presents an application of two methods of multi-criteria decision analysis (mcda), electre iv and todim, in order to tackle the problem of ranking projects with important economic and social consequences in the rio de janeiro state. these projects are ranked under the presence of quantitative and qualitative criteria. electre iv is a method of the french school of mcda whose use does not rely on knowledge of criteria weights. todim, on the other hand, is a method that is based on the paradigm of prospect theory and that has elements of both the french and the american school of mcda. although ranks obtained by both methods were different, the same project was ranked as the best alternative according in both. the practical experience described in this paper has suggested that the use of mcda methods in the ranking of project can significantly clarify the decision making process.
Decision aiding in plastic surgery: a multicriteria analysis
Gomes, Luiz Flávio Autran Monteiro;Rangel, Luís Alberto Duncan;Fernandes, Priscila Pereira;
Pesquisa Operacional , 2012, DOI: 10.1590/S0101-74382012005000011
Abstract: the aim of this article is to present, through a real case, a practical way, based on multicriteria decision aiding, to support decision making in plastic surgery. the case studied was a caucasian woman of 36 years of age with mammarian hypertrophia with ptosis and abdominal lipodystrophy, making it necessary to select the most adequate techniques for the best aesthetic result. for this purpose, the multicriteria methods even swaps and proact were used. three plastic surgeons working in the city of rio de janeiro with equivalent professional experience were consulted as decision agents. in order to define the objectives to be achieved, the criteria relevant to the making of the decision and the alternatives which could be used were identified. throughout this identification and in the later analysis the surgeons participated in the application of the methods, which contributed towards facilitating their acceptance of the multicriteria analysis in their decision making. it was confirmed, in this case study, that the use of multicriteria decision aiding tends to make the medical decision more wide ranging and, above all, transparent. the plastic surgeons themselves validated the analysis, considering it fully consistent with their professional experience.
O Apoio Multicritério à Decis?o na avalia??o de candidatos
Rangel, Luís Alberto Duncan;Gomes, Luiz Flávio Autran Monteiro;
Produ??o , 2010, DOI: 10.1590/S0103-65132010005000016
Abstract: the methods of multi-criteria decision aid are applied to problems of selection, ranking, classifying, and describing alternatives in the presence of multiple criteria, both quantitative and qualitative. this article tackles the problem of using the uta and uta-cr methods for determining the utility function of criteria used to evaluate candidates for the undergraduate program in metallurgical engineering in the fluminense federal university. after presenting the methods and outlining the problem, an analysis of the results shows that the utility functions of criteria obtained using uta-cr are closer to decision-maker preferences than those obtained using uta. it is also shown that, by using uta-cr, it is not necessary to perform the post-optimization analysis that is required by the uta method. in other words, implementation of a single linear program leads to results that are better than those obtained using uta.
O Apoio Multicritério à Decis o na avalia o de candidatos Multicriteria Decision Aid in the evaluation of candidates
Luís Alberto Duncan Rangel,Luiz Flávio Autran Monteiro Gomes
Produ??o , 2010,
Abstract: Os métodos de Apoio Multicritério à Decis o aplicam-se sempre que se deseje selecionar, ordenar, classificar ou descrever alternativas presentes em um processo decisório na presen a de múltiplos critérios - quantitativos e qualitativos. Este artigo aborda o emprego dos métodos UTA e UTA-CR para a determina o das fun es de utilidade dos critérios empregados para avaliar o ingresso de candidatos ao curso de gradua o de Engenharia Metalúrgica da Universidade Federal Fluminense. Após apresentarem-se os métodos e o problema estudado, mostra-se, por uma análise dos resultados, que as fun es de utilidade dos critérios obtidos com o método UTA-CR est o mais próximas das preferências dos decisores do que aquelas obtidas com o método UTA. Observa-se ainda que, pelo método UTA-CR, n o há necessidade de realizar-se a análise de pós-otimiza o feita no método UTA, pois, com apenas uma única implementa o de um programa linear, os resultados obtidos s o melhores que os obtidos pelo método UTA. The methods of multi-criteria decision aid are applied to problems of selection, ranking, classifying, and describing alternatives in the presence of multiple criteria, both quantitative and qualitative. This article tackles the problem of using the UTA and UTA-CR methods for determining the utility function of criteria used to evaluate candidates for the undergraduate program in metallurgical engineering in the Fluminense Federal University. After presenting the methods and outlining the problem, an analysis of the results shows that the utility functions of criteria obtained using UTA-CR are closer to decision-maker preferences than those obtained using UTA. It is also shown that, by using UTA-CR, it is not necessary to perform the post-optimization analysis that is required by the UTA method. In other words, implementation of a single linear program leads to results that are better than those obtained using UTA.
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