Examinando por Materia "Costs"
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Ítem Análisis del comportamiento de los gastos de administración en Isa-intervial y sus concesionarias en Chile(Universidad EAFIT, 2020) Arango Vargas, John Bayron; Escalante Gómez, Juan EstebanÍtem Aplicación de técnicas econométricas y estadísticas en el modelo financiero integral de planeación, previsión y proyección para una empresa de consultoría(Universidad EAFIT, 2024) Prieto Salinas, David Fernando; Quiroz Castellanos, Maira Andrea; Sánchez Ribero, Gustavo AlbertoÍtem Application of virtual technologies for the representation of physical phenomena in maintenance tasks(IOP PUBLISHING LTD, 2020-01-01) Dueas Ramírez L.M.; Villegas López G.A.; Chamat Torres C.P.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)Maintenance during industrial development has evolved, always seeking the in-depth study of the physical phenomena that occur in the elements and systems that have suffered functional failures. Maintenance has been adapted to each challenge presented. The progress and development of computer science have opted for the massive use of information and communication technologies that support industrial processes, generating new possibilities in maintenance management and operation. These tools could contribute to improving the efficiency of maintenance processes, taking into account that these costs represent a third of the total production cost in an organization. This work seeks to identify the evolution of these technological tools in the applications that they have had in representing the physical phenomena of maintenance management. This research also seeks to establish the minimum requirements that these tools must consider in their applications and uses. Considering the appropriation of these technologies in Colombia, in order to determine where the country is in terms of development and technological use, being important information for the recognition of the scenario and decision-making that prevail in a competitive Colombian industry world level. © 2020 Published under licence by IOP Publishing Ltd.Ítem Costos de producción lechera en Colombia, problemas y oportunidades(2009-05-21) López Ramírez, Andrés; Vásquez Hernández, Sebastián; Marín Pérez, FranciscoÍtem Desarrollo de un modelo de costos para empresas de consultoría en servicios de ingeniería para la industria en general(Universidad EAFIT, 2022) Cárdenas Sánchez, Sandra Liliana; Cuéllar Carvajal, Robinson; Uribe Álvarez, Margarita MaríaÍtem Diseño del modelo de control de costos operacionales para Amerisur exploración Colombia limitada(Universidad EAFIT, 2020) Araque González, Andrés Felipe; Cuervo García, Jorge Enrique; Escalante Gómez, Juan EstebanThrough this academic piece we intend to create a business control cost design that will identify and explain all variable and fixed costs that are incurred in oil production at Amerisur Colombia. This academic work, captures operations, profitability, techniques and external factors that make the functionality of the company and projects possible. In addition, the results of this investigation left us with tangible and useful information that could be used to identify if the company should continue or stop working on a specific project due to its profitability and efficiency.Ítem Effects on Electricity Markets of a Demand Response Model Based on Day Ahead Real Time Prices: Application to the Colombian Case(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018-05-01) Rivera, Juan Carlos; Paramo, Oscar Alejandro; Lopez, Gustavo Adolfo; Rivera, Juan Carlos; Paramo, Oscar Alejandro; Lopez, Gustavo Adolfo; Universidad EAFIT. Departamento de Ciencias; Matemáticas y AplicacionesThis paper presents an alternative methodology, based on a cost optimization model, for evaluating some effects of the implementation of an alternative Demand Response (RD) program based on Day Ahead Real-Time Pricing (DA-RTP) in electricity markets. The proposed methodology has three special characteristics: the first one is to assume that users can modify their consumption patterns without altering the quantity demanded daily; second one, users flexibility to shift demand between hours depend of the kind of user and the time (peak vs off peak hours); finally, consumers have limited capability to shift demand outside of certain periods withing the day. The model is tested with a simulation exercise for the Colombian electricity market. The results show a significant improvement in system and market performance, including consumer savings, a flattened load curve, and reduced operational risk in the system. © 2003-2012 IEEE.Ítem Effects on Electricity Markets of a Demand Response Model Based on Day Ahead Real Time Prices: Application to the Colombian Case(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018-05-01) Rivera, Juan Carlos; Paramo, Oscar Alejandro; Lopez, Gustavo Adolfo; Universidad EAFIT. Escuela de Ciencias; Modelado MatemáticoThis paper presents an alternative methodology, based on a cost optimization model, for evaluating some effects of the implementation of an alternative Demand Response (RD) program based on Day Ahead Real-Time Pricing (DA-RTP) in electricity markets. The proposed methodology has three special characteristics: the first one is to assume that users can modify their consumption patterns without altering the quantity demanded daily; second one, users flexibility to shift demand between hours depend of the kind of user and the time (peak vs off peak hours); finally, consumers have limited capability to shift demand outside of certain periods withing the day. The model is tested with a simulation exercise for the Colombian electricity market. The results show a significant improvement in system and market performance, including consumer savings, a flattened load curve, and reduced operational risk in the system. © 2003-2012 IEEE.Ítem Estudio de prefactibilidad para la construcción de un glamping en el Cerro Morasurco en la ciudad de Pasto(Universidad EAFIT, 2023) Gomajoa Montaño, Héctor Marlon; Díez Benjumea, Jhon MiguelÍtem Evolución de los costos de transporte de Wire Mesh Corporation (WMC) a partir de la reciente entrada en vigencia de la Norma ELD (Electronic Logging Device Rule) en el marco de la economía actual de Estados Unidos(Universidad EAFIT, 2019) Vélez Gutiérrez, Juan David; Ríos Castaño, Francisco Javier; Uribe De Correa, Beatriz AmparoThis degree paper examines transportation costs and its evolution from the recent entry into force of the ELD Rule in the United States and the consequences derived from the current state of its economy, analyzing, with economic data –unemployment and inflation figures–, the rule, the impact it generates on manufacturers who need to ship their products to customers and the context of the transportation industry. Additionally, the work presents a measurement of transport costs and the increase they have had in the 2017-2018 period in Wire Mesh Corporation (WMC), reviewing figures, statistical data, reports of the transport industry and the drivers which have led to companies that offer transportation services to drastically increase their rates due to the lack of drivers and the changes in the contractual conditions they must offer in the labor market to attract new ones. Another of the analysis developed in this paper shows the regions of origin of the goods, the relationship of truck loads and the impact on transport costs that Wire Mesh Corporation (WMC) has suffered due to the lack of trucks. In reference to the theoretical framework of this paper, the concept of costs and how these have affected the gross profit margin of Wire Mesh Corporation (WMC) are explained. Finally, it is important to advise that this paper is based on real and recent figures on the economy and the legal framework of transport in the United States to assess the impact of transportation costs on a real sector company over time. Thus, it is expected that with this document the sales and financial departments of Wire Mesh Corporation (WMC) will be able to make decisions based on actual transportation costs.Ítem Maintenance policy optimisation for multi-component systems considering degradation of components and imperfect maintenance actions(Elsevier Ltd, 2018-10-01) Martinod R, R.M.; Bistorin, Oliver; Castaneda Heredia Leonel F.; Rezg, Nidhal; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)This article proposes a stochastic optimisation model in order to reduce the long-term total maintenance cost of complex systems. The proposed work is based on the following approaches: (i) optimisation of a cost model for complex multi-component systems consisting of preventive and corrective maintenance using reliability analysis, which faces two different maintenance policies (periodic block-type and age-based) and (ii) a clustering method for maintenance actions to decrease the total maintenance cost of the complex system. This work evaluates each maintenance policy and measures the effects on imperfect maintenance actions. Finally, the proposed optimisation model is applied to a numerical example which focuses on passenger urban aerial ropeway transport systems, in which the current maintenance policy has been evaluated, considering the established by the international regulation of passenger aerial cable cars. © 2018 Elsevier LtdÍtem Medición financiera equipo comercial(Universidad EAFIT, 2021) López Loaiza, Giony Alexander; Parra Henao, Frank Alexis; Vergara Garavito, JudithÍtem Modelo de costos para Agroavícola Prado, empresa distribuidora de concentrados para animales(Universidad EAFIT, 2019) Betancur Vanegas, Jose Alejandro; Escalante Gómez, Juan EstebanÍtem Modelo operativo financiero para la maduración de los operadores de minería informal en la explotación de oro de la subregión del nordeste antioqueño(Universidad EAFIT, 2019) Morantes Delgado, Óscar Fabián; Uribe Márin, Ricardo ;15435711The objective of all human activity entails a probability of success and impact on its development, and when this probability materializes, data is recorded. However, if the results are coherent with the desired orientation –the strategy–, income is generated; but if these results are not completely in time and place –the materialization of the risks–, there is a deviation called costs and expenses, which, in some cases, leads to desist from the activity itself. In economic activities such as mining, substantial investments have to be made before achieving some type of income. For this reason, it happens that in many cases risk factors are added, because the valuation horizon of the mining business increases over a longer period of time, with little or no confidence in the long-term results. In the case of mining operators in general, their financial illiteracy leads them to mix concepts of investments, expenses, costs and income, among others, which, added to the operational complexity, technically prevents them from applying for loans and obtaining working capital from potential investors, because the benefits of the real performance of the mining operation are not easy to separate. This is how the need to establish a maturity model for gold mining operators is presented, since, due to the nature of the business they develop and the characteristics of the goldfields, a strategy is required that involves historical knowledge of gold mining, the mines, and allows to reduce investment in exploration and its consequent development time with the knowledge and effectiveness of artisanal mining; through the analysis of the registered operational and financial data of their business, this venture leads to mitigate the inherent risks of the aforementioned mining activity –the exploitation of gold– in such a complex socioeconomic environment as that of Antioquia´s northeast sub-region. The proposed maturity model allows to reduce costs through risk management, making it possible to maximize the results of the operation in coherence with the economic activity of the miners, mitigate the impact on people, the environment and society, and promote the continuity of your business. The document below proposes the identification of operational and financial variables necessary to measure the alignment with the organizational strategy of gold mining operators, so that, from a primary extractive activity such as mining, the education of gold mining operators is strengthened, and provides them with the adequate knowledge to perform an analysis of their operation and financing. In this way, they can separate the real operating cost, the investments, the expected results and the amortization horizon, the emerging risks, the associated controls to mitigate them, and the alignment with the corporate strategy, to generate organizational synergies that result in an operation in harmony with the environment and encourage the generation of value for interest groups.Ítem Optimización de los Costos de Operación del Proceso de Electro-oxidación para una Planta de Tratamiento de Aguas Mediante Análisis Estadístico de Superficie de Respuesta(Centro de Informacion Tecnologica, 2016-01-01) GilPavas, E.; Medina, J.; Dobrosz-Gómez, I.; Gómez, M.-A.; GilPavas, E.; Medina, J.; Dobrosz-Gómez, I.; Gómez, M.-A.; Universidad EAFIT. Departamento de Ingeniería de Procesos; Procesos Ambientales (GIPAB)The statistical optimization of the implementation and operational costs of an electrochemical-oxidation process for treatment of wastewater containing dye Yellow 23 was done. The aim was to optimize the operational parameters for the current density, conductivity, and area of electrodes per unit of volume in order to minimize the net present value (NPV) of the operation while maintaining a defined quality for the treated wastewater. To achieve this, the response surface methodology coupled to the Box-Behnken statistical design was used. The optimal conditions found were: a relationship of treated wastewater volume per area of electrodes of 9.076 mL/cm2, conductivity 4000 µS/cm, and current density 20 mA/cm2. At optimal conditions, the NPV for a 10 year operation is 998636 USD, which corresponds to a cost of 0.68USD/m3 of treated water.Ítem Optimization of V-Trough photovoltaic concentrators through genetic algorithms with heuristics based on Weibull distributions(Elsevier Ltd, 2018-02-15) Arias-Rosales A.; Mejía-Gutiérrez R.; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)Photovoltaic V-Troughs use simple and low-cost non-imaging optics, namely flat mirrors, to increase the solar harvesting area by concentrating the sunlight towards regular solar cells. The geometrical dispositions of the V-Trough's elements, and the way in which they are dynamically adjusted to track the sun, condition the optical performance. In order to improve their harvesting capacity, their geometrical set-up can be tailored to specific conditions and performance priorities. Given the large number of possible configurations and the interdependence of the multiple parameters involved, this work studies genetic algorithms as a heuristic approach for navigating the space of possible solutions. Among the algorithms studied, a new genetic algorithm named “GA-WA” (Genetic Algorithm-Weibull Arias) is proposed. GA-WA uses new heuristic processes based on Weibull distributions. Several V-Trough performance indicators are proposed as objective functions that can be optimized with genetic algorithms: (i) Ce? (average effective concentration); (ii) Cost (cost of materials) and (iii) Tsp (space required). Moreover, from the integration of these indicators, three multi-objective indices are proposed: (a) ICOE (Ce? versus Cost); (b) MICOE (Ce? versus Cost and Ce? versus Tsp combined) and (c) MDICOE (similar to MICOE but with discretization considerations). The heuristic parameters of the studied genetic algorithms are optimized and their capacities are explored in a case study. The results are compared against reported V-Trough set-ups designed with the interactive software VTDesign for the same case study. It was found that genetic algorithms, such as the ones developed in this work, are effective in the performance indicators improvement, as well as efficient and flexible tools in the problem of defining the set-up of solar V-Troughs in personalized scenarios. The intuition and the more holistic exploration of a trained engineer with an interactive software can be complemented with the broader and less biased evolutionary optimization of a tool like GA-WA. © 2017 Elsevier LtdÍtem Rediseño del proceso de mantenimiento para los activos productivos de la planta de superficies(Universidad EAFIT, 2020) Rojas Baquero, José Arnulfo; Escalante Gómez, Juan EstebanCurrently, and in the face of high competition from the world market, modern companies are obliged to identify, propose and achieve optimization at all their organizational levels, since no productive sector escapes this trend. Research and development (R&D) and continuous improvement seek to make operations more efficient and effective, which is why they have become a basic component of management in most companies. Companies must implement methodologies to determine the current status of processes through an introspection (internal review) or an external analysis with other companies in the sector or with respect to a standard, through the analysis of variables that can generate cost overruns, reprocesses, inefficiencies, weaknesses, etc., that is, with the application of a benchmarking methodology; the this form determines the gaps and opportunities for improvement that it has and that could be implemented. At present, the maintenance management of productive assets demands great importance to achieve the objectives and goals of productive companies, in order to add value to achieve the greatest possible operational availability in a way that allows obtaining an appropriate cost of In accordance with organizational guidelines and make it possible to be competitive in the industry. Over the years, maintenance has evolved in a very significant way due to the fact that currently there are multiple methodologies, techniques and concepts for its application, with which it is possible to adequately optimize human, technical and material resources and also increase the availability of the productive assets of companies. The implementation of tools and models for maintenance management, such as total productive maintenance (TPM), maintenance focused on reliability (RCM), optimization of planned maintenance (PMO) and world-class maintenance, among others, applied to the productive assets of tiles or surfaces, is a suitable option to be able to reinforce and meet the company's objectives in order to increase the availability, reliability and maintainability of its production processes, while optimizing the programming and execution of plans current maintenance. For this, the maintenance strategy must be reinforced and restructured with the identified improvement opportunities, which could be presented in the future to the operations management so that it determines priority, times, objectives and resources to be assigned for its implementation.Ítem A Remote Monitoring System for Charging Stations with Photovoltaic Generation(Springer Verlag, 2019-01-01) Sánchez S.; Cárdenas-Gómez I.; Mejía-Gutiérrez R.; Osorio-Gómez G.This work aims to develop a prototype of a monitoring system for a Photovoltaic Charging Station (PVCS) installed in Universidad Eafit. The design is proposed according to the context of remote areas, which are off-grid or where utility grid’s quality is low, and considering the possibility of having standalone charging stations installed in such places. The proposed system integrates several hardware components and communication protocols by making use of Internet of Things (IoT) and Cloud Platform technology. The presented solution is a low-cost infrastructure and enables real-time monitoring and data storing for future analysis. © 2019, Springer Nature Switzerland AG.Ítem Scalable. Ad Hoc, Low Cost, Mobile, Online Laboratories(Institute of Electrical and Electronics Engineers Inc., 2018-01-01) Zapata-Rivera L.F.; Larrondo Petrie M.M.; Zalewski J.; Shockley J.; Costa J.; Lalinde-Pulido J.; Cristobal E.S.; Castro M.; Miguel Rodriguez A.; Saliah-Hassane H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesThe IEEE Educational Society has sponsored the development of IEEE-SA P1876™ standard for Networked Smart Learning Objects for Online Laboratories. This paper proposes two different architectures that integrate components to support educational online laboratories, through the use of xAPI statements to communicate between Remote Laboratory Management Systems, Virtual Learning Environments and Learning Analytics Generators. Proof of concept implementations of three scalable, ad hoc, low-cost, mobile, online laboratories that utilize the proposed distributed and centralized architectures are described, one fully integrated to an Actionable Data Book. The next steps would be to implement Mobile Massive Open Online Laboratories (M-MOOLs) within the context of Massive Open Online Courses (MOOCs), using the P1876™ standard under development. © 2018 IEEE.