Metropolitan University of Venezuela

Caracas, Venezuela

Metropolitan University of Venezuela

Caracas, Venezuela
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Hernandez J.G.,Metropolitan University of Venezuela | Garcia M.J.,Gerencia de Investigacion
Proceedings ICIL 2010 - International Conference on Industrial Logistics "Logistics and Sustainability" | Year: 2010

In order to facilitate the learning of enterprise logistics several models of academic origin have been created, one of them is the Logistic Model Based on Positions (MoLoBaC), that explain logistic through the associated positions and between the forty three positions that conform it are included the Order Processing Manager. On the other hand MoLoBaC serves as platform to the Logistic Model Based on Indicators of Position (MoLoBaICa), that analyzes the logistics measuring the indicators of performance for the different positions related to logistics. From the conjunction of these two models, the objective of this work arises: To show through the Order Processing Manager, how it works and as which are the benefits of the MoLoBaICa.


Fernandez-Vine M.B.,Metropolitan University of Venezuela | Gomez-Navarro T.,Polytechnic University of Valencia | Capuz-Rizo S.F.,Polytechnic University of Valencia
Journal of Cleaner Production | Year: 2013

Small and Medium Sized Enterprises (SME) face barriers to the implementation and development of eco-efficiency that could be overcome taking advantage of the adequate stimuli and incentives. A previous research and a thorough literature analysis show Public Administration (PA) is a key stakeholder. PA could use better its tools to stimulate SME to improve their ecoefficiency. Among these tools it can be named well known "command and control" tools like legislation or taxes, but also price policies, green procurement, ecological education, eco-innovation support and others. This paper reviews these tools and how they contribute to overcome barriers to ecoefficiency by offering external and internal incentives for SME. The analysis is focused on the case of Venezuelan public administration and SME but it can be generalized to other case studies. In addition, a panel of experts validates the results and assesses the public administration tools by means of the policy Delphi method. The assessment is based on criteria like: market influence, capability of the public administration for controlling results, tool costs, impact on public administration image, timespan to get results, etc. The assessment, therefore, allows ranking and understanding the tools according to their effectiveness and efficiency to support SME to improve their ecoefficiency. Due to the specific characteristics of the case study: SME of Venezuela, the method shows the best mix of public administration tools includes mainly "command and control" tools. Also the mix includes certain "new-approach" tools like advertising about responsible consumption and eco-efficient products, or education/training in environmental responsibility. The method also allows understanding better how the tools will help accomplishing the objectives for ecoefficiency of the public administration. Therefore, this research provides a method for raising information to be used when planning the actions to improve eco-efficiency of the SME. © 2012 Elsevier Ltd. All rights reserved.


Garcia G. M.J.,Minimax Consultores | Hernandez R. J.G.,Metropolitan University of Venezuela | Hernandez G. G.J.,Minimax Consultores
International Conference on Industrial Logistics, ICIL 2012 - Conference Proceedings | Year: 2012

The Logistic Model Based in Position, studies the enterprise logistics following the functions performed by each one of his forty-four charges. These positions, particularly the Virtual channel Manager, continuously face decisions making, under uncertainty or risk. For this decisions making there are developed two models: The Amplitude Model, under uncertainty and the Model of Amplitude for Risk and Uncertainty, under risk. Of there the objective of this work arises: Showing as upon using The Amplitude Model (TAM) and the Model of Amplitude for Risk and Uncertainty (MARU), is facilitated the decisions making, relating to the functions of the Virtual channel Manager, of the Logistic Model Based on Positions (LoMoBaP).


Garcia-Melon M.,Polytechnic University of Valencia | Gomez-Navarro T.,Polytechnic University of Valencia | Acuna-Dutra S.,Metropolitan University of Venezuela
Environmental Impact Assessment Review | Year: 2012

The evaluation of sustainable tourism strategies promoted by National Parks (NP) related stakeholders is a key concern for NP managers. To help them in their strategic evaluation procedures, in this paper we propose a methodology based on the Analytic Network Process and a Delphi-type judgment-ensuring procedure. The approach aims at involving stakeholders in a participatory and consensus-building process.The methodology was applied to Los Roques NP in Venezuela. The problem included three sustainable tourism strategies defined by the stakeholders: eco-efficient resorts, eco-friendly leisure activities and ecological transportation systems. Representatives of eight stakeholders participated in the methodology. 13 sustainability criteria were selected.Results provide some important insights into the overall philosophy and underlying participants' conception of what sustainable development of Los Roques NP means. This conception is broadly shared by stakeholders as they coincided in the weights of most of the criteria, which were assigned individually through the questionnaire. It is particularly noteworthy that tourists and environmentalists almost fully match in their assessments of criteria but not of the alternatives.Moreover, there is a great agreement in the final assessment. This suggests that the regular contact among the different stakeholders, i.e. tourists with inhabitants, authorities with environmentalists, tour operators with representatives of the ministry, etc. has led to a common understanding of the opportunities and threats for the NP.They all agreed that the procedure enhances participation and transparency and it is a necessary source of information and support for their decisions. © 2011 Elsevier Inc.


Vargas R.,Simon Bolivar University of Venezuela | Diaz S.,Simon Bolivar University of Venezuela | Viele L.,Simon Bolivar University of Venezuela | Nunez O.,Simon Bolivar University of Venezuela | And 4 more authors.
Applied Catalysis B: Environmental | Year: 2013

The effects of electrode potential and the initial concentration of 2,2-dichlorovinyl dimethyl phosphate (dichlorvos, DDVP) on its oxidation/mineralization reaction kinetics, using an electrochemical oxidation system based on SnO2Sb2O5 anodes, have been studied. Electrochemical degradation followed the Langmuir-Hinshelwood mechanism, with adsorption equilibrium constant K=0.082Lmg-1 of dichlorvos on the electrode material surface, and reaction rate constant k=0.021mgL-1s-1 of the organic compound-electrocatalyst adduct. Chemical oxygen demand and CO2 measurements in neutral media suggest that the rate limiting step for mineralization is the same as for the electrochemical oxidation. The results show that the electrochemical mineralization of dichlorvos was readily possible at potentials more positive than 2.5V vs. SCE, with lower reaction half-lives than obtained with other advanced oxidation process. The fastest overall degradation rate constants were obtained at limiting low concentrations of dichlorvos in aqueous solution, kobs=kK=0.0017s-1. © 2013 Elsevier B.V.


Smith-Perera A.,Metropolitan University of Venezuela | Garcia-Melon M.,Universidad Politécnica de Ingeniería | Poveda-Bautista R.,Universidad Politécnica de Ingeniería | Pastor-Ferrando J.-P.,Universidad Politécnica de Ingeniería
Renewable and Sustainable Energy Reviews | Year: 2010

In this paper a new approach to prioritize project portfolio in an efficient and reliable way is presented. It is based on strategic objectives of the company and multicriteria decision methods. The paper introduces a rigorous method with acceptable complexity which seeks to assist managers of a big Electrical Company of Venezuela to distribute the annual budget among the possible improvement actions to be conducted on the electrical network of Caracas. A total of 15 network improvement actions grouped into three clusters according to the strategic objectives of the company have been analyzed using the Project Strategic Index (PSI) proposed. The approach combines the use of the Analytic Network Process (ANP) method with the information obtained from the experts during the decision-making process. The ANP method allows the aggregation of the experts' judgments on each of the indicators used into one Project Strategic Index. In addition, ANP is based on utility ratio functions which are the most appropriate for the analysis of uncertain data, like experts' estimations. Finally, unlike the other multicriteria techniques, ANP allows the decision problem to be modelled using the relationships among dependent criteria. The participating experts coincided in the appreciation that the method proposed in this paper is useful and an improvement from traditional budget distribution techniques. They find the results obtained coherent, the process seems sufficiently rigorous and precise, and the use of resources is significantly less than in other methods. © 2010 Elsevier Ltd. All rights reserved.


Garcia-Melon M.,Polytechnic University of Valencia | Poveda-Bautista R.,Polytechnic University of Valencia | Del Valle M. J.L.,Metropolitan University of Venezuela
International Journal of Production Economics | Year: 2015

In this paper a new approach that uses the alignment of projects with corporate strategic objectives to prioritize project portfolio in an efficient and reliable way is presented. For this purpose, corporate strategic objectives will be used as prioritization criteria to obtain the Relative Alignment Index (RAI) of each project which indicates how close or far each project is from the strategic objectives of the company. The approach presented uses the Analytic Network Process. This technique allows considering the influences among all the elements within the network, that means, the strategic objectives, and specially the projects within a portfolio. The proposed RAI index helps to select the best strategically aligned projects for the organization. The proposed RAI index and its form of evaluation have not previously been considered in the project portfolio literature until now. The research methodology for the development of RAI is based on a combination of a synthesis of the literature across the diverse fields of project management, project alignment, multicriteria decision methods and a parallel analysis of an industrial case study. The use of the proposed RAI index is demonstrated using a rigorous methodology with acceptable complexity which seeks to assist managers of the National Electricity Corporation of Venezuela, recently founded and composed by 13 merging old companies, both public and private, in their yearly resources' assignment on their projects portfolio. The aim being to determine a projects ranking based on their degree of alignment to corporate strategy and on the judgments of a group of experts, such as the management board. The new corporation assumed the challenge of setting strategic directions (Mission, Vision, Values, Strategic objectives, Plans, Programs, etc.) common to all merging companies. This approach with multi-stakeholders support allows managers to strategically allocate resources to each project in a consensual way. © 2015 Elsevier B.V. All rights reserved.


Vargas R.,Simon Bolivar University of Venezuela | Borras C.,Simon Bolivar University of Venezuela | Mostany J.,Simon Bolivar University of Venezuela | Scharifker B.R.,Simon Bolivar University of Venezuela | Scharifker B.R.,Metropolitan University of Venezuela
Electrochimica Acta | Year: 2012

The diffusive-convective equation under the hydrodynamic conditions of rotating disk electrodes was solved for electrochemical reactions following the Langmuir-Hinshelwood kinetic mechanism, and an expression has been obtained for the current (reaction rate) as a function of the rotation rate, considering adsorption-desorption equilibrium and slow reaction of adsorbed species on the electrode surface. This expression has been applied to the experimental evaluation of electrochemical oxygen transfer to p-methoxyphenol and p-nitrophenol on lead dioxide electrodes. The Langmuir equilibrium constants and kinetic reaction rate constants obtained with the rotating disk electrode compare well with the corresponding values determined from independent adsorption isotherm and electrolysis studies, respectively, demonstrating that the approach presented appropriately describes the kinetic couplings between mass transport, adsorption-desorption equilibrium, and surface reactions, occurring in processes following the Langmuir-Hinshelwood mechanism. © 2012 Elsevier Ltd.


Fernandez-Vine M.B.,Metropolitan University of Venezuela | Gomez-Navarro T.,Universidad Politécnica de Ingeniería | Capuz-Rizo S.F.,Universidad Politécnica de Ingeniería
Journal of Cleaner Production | Year: 2010

This paper presents a comparison analysis of eco-efficiency in the small and medium sized enterprises (SMEs) of Venezuela. The research can be divided into three parts: the first part reviews similar studies in the literature on the level of eco-efficiency exhibited by the companies of Venezuela and other countries. In the second place, the findings of a survey conducted on Venezuelan SMEs allowed the definition of 54 eco-efficiency profiles. Thirdly, six national experts in cleaner production and eco-efficiency were interviewed. The interview was based on a questionnaire similar to that used in the survey of the Venezuelan SMEs. At a second meeting, the experts were asked to discuss on the similarities and differences between their answers and those of the company's managers. The findings of the survey allow us to conclude that Venezuelan SMEs understand the legal environmental regulations that affect them but they do not perceive the influence of external driving forces like customers demand for green products or institutional incentives. The adoption of eco-efficiency practices is not perceived as an incentive to improve competitiveness so that the environmental strategies adopted generally aim at reducing costs or avoiding non-compliance sanctions and negative effects on the company image. Materials recycling and reuse, especially packaging materials, are common practices; however, other environmental tools or practices have not been implemented yet, e.g. environmental management systems (EMS), process, product and services design tools based on the product life cycle, renewable energy resources or green marketing. There are also differences among the eight industrial sectors analyzed, food and chemical industries having the higher index of eco-efficiency practices, and plastic and wood industries the lower. © 2010 Elsevier Ltd. All rights reserved.


Poveda-Bautista R.,Polytechnic University of Valencia | Baptista D.C.,Metropolitan University of Venezuela | Garca-Melon M.,Polytechnic University of Valencia
International Journal of Production Research | Year: 2012

In this paper a new approach to assess companies' competitiveness performance in an efficient and reliable way is presented. It introduces a rigorous methodology, based on multi-criteria techniques, which seeks to assist managers of companies within a specific industrial sector in providing information about their relative position in order to define improvement action plans. The approach combines the use of the analytic network process (ANP) method with the balanced scorecard (BSC) to achieve competitiveness indicators. The ANP method allows the aggregation of experts judgments on each of the selected indicators used into one company competitiveness index (CCI). To demonstrate the goodness of the methodology, a case study of the plastic sector of Venezuela has been carried out. Three companies have been analysed using the CCI proposed. The participating experts agreed that the methodology is useful and an improvement from current competitiveness measurement techniques. They found the results obtained coherent and the use of resources significantly less than in other methods. © 2012 Copyright Taylor and Francis Group, LLC.

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