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Search Results: 1 - 10 of 14335 matches for " Sant'Anna Annibal Parracho "
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Probabilistic composition of criteria for schedule monitoring
Sant'Anna, Annibal Parracho;
Pesquisa Operacional , 2010, DOI: 10.1590/S0101-74382010000300013
Abstract: time is a key factor in management. along a project execution, keeping the best completion rates, not too slow and not too fast, is a central objective but such a best rate cannot be suitably anticipated in a precise schedule. it must be determined on the job, on a comparative basis. this paper develops an evaluation system involving the measurement of schedule fitting indicators designed to deal with such conditions. this evaluation system is based on a transformation of the data into probabilities of reaching the frontier of best performances that permits precisely composing measurements on correlated attributes. this feature of the system allows for combining criteria evaluated on elementary and on aggregate levels.
Rough sets analysis with antisymmetric and intransitive attributes: classification of brazilian soccer clubs
Sant'Anna, Annibal Parracho;
Pesquisa Operacional , 2008, DOI: 10.1590/S0101-74382008000200003
Abstract: this work aims to develop alternative classifications for teams in a championship. data from the 2005 brazilian national soccer championship are analyzed. rough sets theory (rst) is employed in this analysis. by evaluating the quality of the approximation in terms of probabilities of concordance and discordance between the classification by the set of decision attributes and by the set of condition attributes of a randomly chosen pair of objects as discernible or indiscernible, the modification of rst employed allows to consider antisymmetric and intransitive relations. the balance between the numbers of goals scored by the pairs of clubs in direct confrontations is one such relation.
Aleatoriza??o e composi??o de medidas de preferência
Sant'Anna, Annibal Parracho;
Pesquisa Operacional , 2002, DOI: 10.1590/S0101-74382002000100006
Abstract: models for preferences, established through the ranking of the options according to isolated factors, are developed here. randomization of ranks allows us to compute the probability of each option be raised to the position of best choice. it is verified that, in horses races, measures of preference built through odds of the options to hold the first position according to some criterion or to a combination of criteria are more correlated with the measure of preference given by the final betting distribution than those given directly by the ranks.
Modelagem da produtividade e gest?o da qualidade acadêmica
Sant'Anna, Annibal Parracho;
Produ??o , 1999, DOI: 10.1590/S0103-65131999000100001
Abstract: this paper presents a dynamic hierarchical model for the production of university departments. it is a hierarchical model because technical coefficients of the academic production function are modeled as function of second level explanatory variables in such a way that such production function is allowed to change coherently from one department to another. it is dynamic in the sense that these technical coefficients are also allowed to change through time. moreover, validation and outlier selection techniques are applied to feed an automatic model revision procedure that preserves continuity in the evaluation process.
Aleatoriza o e composi o de medidas de preferência
Sant'Anna Annibal Parracho
Pesquisa Operacional , 2002,
Abstract: Modelos para a forma o das preferências combinando preferências estabelecidas através da ordena o das op es possíveis segundo fatores isolados s o aqui desenvolvidos. é, também, proposta uma sistemática de aleatoriza o dos postos para permitir o cálculo da probabilidade de cada op o ocupar o primeiro posto. Aplicando esta sistemática a apostas em corridas de cavalos, verifica-se que a medida da preferência pela chance relativa de a op o ocupar o primeiro posto segundo um critério qualquer, ou segundo uma combina o dos critérios, é mais correlacionada com a medida de preferência dada pela distribui o final das apostas que a medida dada diretamente pelo vetor de postos. A transforma o dos postos em chances relativas permite detectar a alta correla o com as apostas de uma medida de preferência agregada que envolve a proje o sobre uma op o selecionada como a de maior preferência segundo critério dominante.
MODELAGEM E AVALIA O DA PRODUTIVIDADE DE CURSOS DE MESTRADO EM ENGENHARIA DE PRODU O
Annibal Parracho SantAnna
Relatórios de Pesquisa em Engenharia de Produ??o , 2001,
Abstract: This paper compares different methodologies used to derive global productivity indices from particular criteria. To develop the comparison in a concrete framework, the methodologies are applied to evaluate the productivity of the Faculty resources of the Brazilian M.Sc. courses in the area of Production Engineering. Research is focused on the effect of the quantity of students on the productivity of Faculty, measured with respect to two output variables: students concluding the course and professors having full texts accepted in congresses during the year. The analysis of data and results obtained confirms the importance of taking into account the possibility of random deviations.
CáLCULO PROBABILíSTICO DE PRODUTIVIDADES GLOBAIS
Annibal Parracho SantAnna
Relatórios de Pesquisa em Engenharia de Produ??o , 2001,
Abstract: Criteria to evaluate productivity based on the modeling of resources and products with error are developed here. Proposals to deal with the lack of previous information on the distribution of probabilities of the random disturbances are also developed.The measures of global productivity initially proposed are constructed following the principles of Data Envelopment the Analysis (DEA), of measuring the productivity by proximity of the observed excellent performances. In the orientation to output maximization, the productivity will be measured by the probability of the production unit to present the maximum volume of some output, not presenting the maximum volume of any input. In the orientation for input minimization, it will be measured by the probability to present the smallest volume of some input and not to present the smallest volume of any output.Other measurement strategies are then discussed, appropriate to situations where there is no reason to prefer one or another group of variables, where there are more than two groups of variables to consider or where efficiency is aimed in terms of escaping from a floor of worst performance, instead of reaching a ceiling of excellent performance.
RANDOMIZATION AND COMPOSITION OF PREFERENCES IN HORSE RACES
Annibal Parracho SantAnna
Relatórios de Pesquisa em Engenharia de Produ??o , 2001,
Abstract: Models for preferences, established by ranking the available options according to isolated criteria, are developed here. Randomization of ranks allows us to compute the probability of each option being raised to the position of best choice. These partial measures of preference are finally aggregated into global measures. It is verified that, in horse races, measures of preference built through odds of the options to hold the first position according to some criterion or to a combination of criteria are more correlated with the measure of preference given by the final betting distribution than those given directly by the ranks.
Análise de Eficiência em Tratamentos Cirúrgicos em Período de Mudan a Tecnológica
Douglas Rafael Moreira,Annibal Parracho SantAnna
Relatórios de Pesquisa em Engenharia de Produ??o , 2010,
Abstract: Investigam-se neste trabalho os efeitos da evolu o do emprego de angioplastiascoronarianas e revasculariza es miocárdicas para o tratamento de isquemias cardíacas, noperíodo de 1995 a 2002, no Sistema único de Saúde no Estado de Minas Gerais. Esse é umperíodo de intensa mudan a tecnológica, caracterizada pela amplia o do uso do primeirodesses procedimentos. Estuda-se a evolu o do número de óbitos associados ao uso dessesprocedimentos, levando em conta variáveis como a dimens o da popula o atendida e darede hospitalar em termos de leitos disponíveis no SUS, assim como faixa etária e sexo dospacientes atendidos. Para esse estudo empregam-se técnicas de Análise Envoltória deDados e Composi o Probabilística. As duas abordagens empregadas revelam uma perdade eficiência ao longo do período.
Composi o Probabilística na Avalia o de Call Centers
Felipe Quintas Conde,Annibal Parracho SantAnna
Relatórios de Pesquisa em Engenharia de Produ??o , 2009,
Abstract: O presente estudo apresenta um método de apoio multicritério à decis o que permite às empresas avaliar seus centros de atendimento de forma eficiente e sistemática. O método proposto contempla a análise dos principais critérios associados ao servi o de atendimento ao cliente. Uma análise comparativa, baseada na composi o probabilística de preferências, resulta na ordena o dos centros de atendimento segundo diferentes pontos de vista.
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