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Luis G. Vargas
University of Pittsburgh
Mathematical optimizationMathematicsComputer scienceManagement scienceAnalytic hierarchy process
164Publications
35H-index
7,936Citations
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Publications 167
Newest
#1M. Gabriela Sava (Clemson University)H-Index: 1
#2Luis G. Vargas (University of Pittsburgh)H-Index: 35
Last. James G. Dolan (URMC: University of Rochester Medical Center)H-Index: 23
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The decision-making process involves, most of the time, working with limited and/or incomplete information to obtain a one-time synthesis of one’s preferences. However, additional information might be acquired by the decision-maker at a later time. To identify the impact that the additional information could have on the initial result, we developed a new multi-dimensional stability analysis that provides a comprehensive image of how preferences change or evolve, as perturbations are applied to t...
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#1Jing Yang (China Jiliang University)
#2Luis G. Vargas (University of Pittsburgh)H-Index: 35
Last. Lijun Zhou (China Jiliang University)
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#1José Ignacio Peláez (UMA: University of Málaga)H-Index: 9
#2Eustaquio A. Martinez (University of the East)H-Index: 2
Last. Luis G. Vargas (University of Pittsburgh)H-Index: 35
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Technological advances and the Internet have changed the way consumers approach the market for assets and services. Increasingly, consumers use the opinions of others to make their decisions. Web sites have assessment indexes (ORIs, ORS), where consumers value products/services using discrete-value scales, like stars or likes. But these ways of assessing are being questioned for several reasons such as the answers’ reliability, and the opinions representativeness and aggregation. Lack of reliabi...
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#1Shannon Harris (VCU: Virginia Commonwealth University)
#2Jerrold H. May (University of Pittsburgh)H-Index: 20
Last. Krista M. Foster (Mendoza College of Business)
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Abstract This paper studies how appointment cancellations affect scheduling strategies in outpatient healthcare clinics. While cancellation rates in outpatient clinics have been reported to be as high as 27%, cancelled appointments are often ignored, or grouped with no-shows in healthcare scheduling models. We find that there exists a value of total demand that, when calculated over a scheduling horizon, marks the boundary between where cancellations hurt or help a clinic. We refer to that value...
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#1Narayan Ramasubbu (University of Pittsburgh)H-Index: 16
#2Jennifer Shang (University of Pittsburgh)H-Index: 25
Last. Luis G. Vargas (University of Pittsburgh)H-Index: 35
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We conceptualize task interdependence between firms in outsourced service operations as an endogenous design choice made by the outsourcing firm. Then, utilizing relative firm efficiency and Tobin’...
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#2L.G. VargasH-Index: 1
espanolEste trabajo recoge brevemente el concepto, la evolucion historica y las diferentes escuelas de una de las partes de la Investigacion Operativa mas fructifera y con mayor difusion de los ultimos 45 anos: la Decision Multicriterio. Asi mismo, analiza la evolucion que el metodo cientifico ha seguido en este periodo de tiempo y cuales son las nuevas orientaciones que presenta en el contexto de la Sociedad del Conocimiento. Finalmente, se incluyen una serie de ideas sobre cuales pueden ser al...
3 Citations
#1José Ignacio Peláez (UMA: University of Málaga)H-Index: 9
Last. Luis G. Vargas (University of Pittsburgh)H-Index: 35
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Abstract The use of data obtained from social media in decision-making is growing, because people are increasingly using these means to inform themselves, express opinions or make valuations of brands, services, etc. Increasingly, people and organizations use this information to make strategic decisions for their business. This decision process involves, among other thing, obtaining a ranking of alternatives to support the decision. However, in many decision-making models the use of data is done...
3 CitationsSource
#1Janice L. Pringle (University of Pittsburgh)H-Index: 11
#2Aleksandra Sasha Milicevic (University of Pittsburgh)H-Index: 2
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The current study evaluates changes in access as a result of the MyVA Access program—a system-wide effort to improve patient access in the Veterans Health Administration. Data on 20 different measu...
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#1Luis G. Vargas (University of Pittsburgh)H-Index: 35
#2H. J. Zoffer (University of Pittsburgh)H-Index: 3
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