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Metodología Brown Paper aplicada al beneficio del caucho natural con productores del Bajo Cauca antioqueño
(Latin American and Caribbean Consortium of Engineering Institutions, 2017-01-01) Echeverry Cartagena C.; Rodriguez Arroyave C.; Gómez Quintero V.; Gomes Donadeli R.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
This paper presents the application of the Brown Paper methodology in the process of obtaining natural rubber with producers from the Colombian Bajo Cauca antioqueño region. The objective of this methodology is the standardization of the operating conditions in the associations, ASCABIA and ASCULTICAUCHO, taking into account the cleaning conditions and personal protection equipment. Other information is given for the Brown Paper methodology, showing how it was applied with the rubber farmers and detailing the results and the improvements obtained through the process. © 2017 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.
Assessing interactions among students geographically disperse during multinational design projects
(AMER SOC ENGINEERING EDUCATION, 2014-01-01) Esparragoza, Ivan E.; Lascano Farak, Sheila Katherine; Ocampo, Jared Roberto; Vigano, Roberto; Duque-Rivera Duque-Rivera, Jorge W.; Rodriguez, Carlos A.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
The new business model and global operations of many enterprises have brought new challenges for engineers working in multinational companies. These new trends and the need of educating world-class engineers with global competencies have opened opportunities for new educational models to expose students to international experiences to start developing those capabilities. One pedagogical activity used to promote global competencies is the participation of students in multinational design projects, which is a problem-based learning approach in an international setting, where students get immersed in the solution of an engineering design task while they work in teams and collaborate with international partners. Consequently, a collaborative network of institutions from the Americas and Italy has developed and executed collaborative multinational design projects as part of academic experiences for their students. The main goal of these projects is to foster international collaboration and to offer an opportunity to the students to develop professional skills through international teamwork effort in the solution of a design problem. However, a real challenge of this practice has been to create an effective interaction among the students participating in this type of projects and to maintain the flow of information, and student engagement in the project and in their learning. Therefore, this paper reports the work related to an assessment approach used to monitor students' interaction in multinational collaborative projects. The main objectives of the proposed assessment tool are: (a) to evaluate the interaction among the students (frequency, quantity and quality); (b) to determine the value of social interaction in the flow of the interaction; (c) to determine the impact of interaction in the development of the project.
Aplicación del Marco de Fundamentación del Project Management Institute (PMI) para la Asignatura Proyecto de Elementos de Máquinas y Equipos
(Latin American and Caribbean Consortium of Engineering Institutions, 2016-07-22) Cartagena Echeverry, C.; Carlos A. LÓPEZ Cañas; Montoya, Jorge Esteban; Alzate, Andres; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
La industria manufacturera colombiana necesita de una guía estructurada, en la que el diseño en ingeniería se interrelacione constantemente con la teoría administrativa a través de todo el ciclo de vida de fabricación de equipos, garantizando que un proye
El diagnóstico y los planes de trabajo como un requisito para la implantación exitosa de Lean Manufacturing
(Latin American and Caribbean Consortium of Engineering Institutions (LACCEI Inc), 2014-07-24) Rodriguez, C.; echeverri cartagena, carlos; López Cañas, C.A.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
Este artículo presenta los resultados de ejecución de un diagnóstico inicial sobre el estado de implementación de Lean Manufacturing (Manufactura Esbelta) en un grupo de catorce empresas participantes del proyecto denominado Programa de Gestión del Sector
Advantages of learning factories for production planning based on shop floor simulation: A step towards smart factories in industry 4.0
(Institute of Electrical and Electronics Engineers Inc., 2019-01-01) Andres M.; Alvaro G.; Julian M.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
In future industry, defined as Industry 4.0, production planning and control strategies will be executed by human beings backed by computational tools for decision making; One of these tools is shop floor simulation, and a natural scenario to learn about how to use it for productive processes design and control are the Learning Factories. In this paper, shop floor simulation is identified as a tool for planning and controlling production, also a state of the art about its implementation is exposed in academic and industrial environments. In addition, the trends in the construction of the Learning Factories are shown, and some aspects about how they can be used for shop floor simulation. This work also proposes the realization of a digital model in EAFIT University Learning Factory as a first step towards digital learning factory. © 2019 IEEE.
Evaluación de la implementación de metodologías BPM/ PLM para la fabricación de productos de madera en un proyecto académico
(Latin American and Caribbean Consortium of Engineering Institutions, 2018-01-01) Echeverri C.M.; Rodríguez C.A.; Montoya J.E.; Alzate A.F.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
This case of study it is showed how the implementation of two different methods reach the effective interaction of engineering processes that have statistically meaningful differences between the key performance indicators for the reaching, the cost and the time. Both from the identification of projects, products, machines and in general of the technologies involved in the manufacturing of products made of wood. The first one is based on the framework from the Project Management Institute (PMI), meanwhile the second one is based on a mixture of Business Processes Management (BPM) and the Product Lifecycle Management (PLM) for projects management. The case of study describes the key focuses, assumptions and tasks required by them, like the experimental design and the statistically comparison gotten between them. At the end, the effects of both focuses related with the key performance indicators for the reaching, cost and time are discussed. © 2018 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.
Diseño y fabricación de máquinas con enfoque PLM: Caso de estudio máquinas de mecanizado CNC en la facultad de ingeniería.
(Latin American and Caribbean Consortium of Engineering Institutions, 2016-07-22) Cartagena Echeverry, C.; Rodríguez, Carlos; Montoya, Jorge; Alzate, Andres; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
El reto de diseñar y construir maquinaria que se ajuste a los procesos productivos dentro de las organizaciones es un desafío que deben asumir de manera continua las áreas de ingeniería
PLM in a didactic environment: The path to smart factory
(Inderscience Enterprises Ltd., 2016-01-01) Bedolla, J.S.; Orozco, J.M.; De Jesús Guarín Grisales, Á.; D'Antonio, G.; Chiabert, P.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
Universities around the world are teaching PLM following different strategies but most of them are limited to design applications. This paper presents a didactic manufacturing plant where design and production are managed in a PLM environment. During the course, students are exposed to the complexity of managing the production of a modular chess set while at the same time they are asked to fulfil design requirements and meet production, quality and cost goals. Course description and the achieved results are analysed thoroughly. This is the first step to realise a 'learning by doing' modular course in smart factories: future practitioners must be skilled in this theme, which plays a key role for the worldwide competition. The path towards such a course is also presented. Copyright © 2016 Inderscience Enterprises Ltd.
Application of product line commonality index (PCI) in a family of products
(TRANS TECH PUBLICATIONS LTD, 2014-01-01) Oliver Rubio, M.; Julian Mora, O.; Alvaro Guarin, G.; Pablo Carrizosa, I.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
Currently many companies base their marketing strategy around a family of products. Thus, they regularly add new variations to products in order to meet changing market needs, or to attract new customers. Although the basic functionality remains unchanged across products, new features, aesthetic appearance and technologies are incorporated in each new product. This if it is not checked, can generate the "complexity of the product," which leads to a loss of productivity or quality. Thus, the effective management of product variations in design and manufacturing is challenging. The key is minimizing the non-value added variations through models within a range of options without limiting customers. This article discusses the factors that contribute to the "complexity of the product" and this is done through the product line commonality index (PCI) [1], which measures the level of common parts in a product family. A case study of bicycle frame displays its implementation and functionality. The index shows the possibility that the products in a family share parts effectively (modularity) and reduces the total number of parts (multifunctionality). © (2014) Trans Tech Publications, Switzerland.
Developing an experimental case in aluminium foils 1100 to determine the maximum angle of formability in a piece by Dieless-SPIF process
(IOP PUBLISHING LTD, 2014-01-01) Gabriel, Paramo; Adrian, Benitez; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
Incremental sheet forming by the method of single point incremental forming Dieless-SPIF, is a widely studied process, experimented and developed in countries with high manufacturing technologies, with friendly costs when the productive configuration in a productivity system is based in small production batches. United states, United kingdom and France lead this type of studies and cases, developing various proof with experimental geometries, different from the national environment such as Colombia, Bolivia, Chile, Ecuador and Peru where this process where discretely studied. Previously mentioned, it pretends develop an experimental case of a particular geometry, identifying the maximum formability angle of material permissible for the forming of a piece in one pass, the analysis of forming limit curve (FLC), with the objective to emphasizes in this innovative method based in CAD-CAM technologies, compare with other analogous process of deformation sheet metal like embossing, take correct decisions about the viability and applicability of this process (Dieless) in a particular industrial piece, which responses to the necessities of productive configurations mentioned and be highly taken like a manufacturing alternative to the other conventional process of forming sheet metal like embossing, for systems with slow batches production. © Published under licence by IOP Publishing Ltd.
PLM in a Didactic Environment: The Path to Smart Factory
(Springer Verlag, 2016-01-01) Mora-Orozco, J.; Guarín-Grisales, Á.; Sauza-Bedolla, J.; D’Antonio, G.; Chiabert, P.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
Universities around the world are teaching PLM following different strategies but most of them limited to design applications. This paper presents a didactic manufacturing plant where design and production are managed in a PLM environment. During the course, students are exposed to the complexity of managing the production of a modular chess set while at the same time they are asked to fulfil design requirements and meet production, quality and cost goals. Course description and achieved results are analyzed thoroughly. Moreover, the efforts to achieve the smart factory are presented.
Application Design Methodology for Building a Device Foil Incremental Deformation by Double Point Method Dieless-DPIF
(Institute of Electrical and Electronics Engineers Inc., 2014-01-01) Bermudez, G.P.; Garcia, J.A.; Lozano, A.B.; Universidad EAFIT. Departamento de Ingeniería de Producción; Tecnologías para la Producción
The new manufacturing technologies of the world are increasingly demanding the design and redesign of new alternative products and processes that can be useful and low cost term. The alternative solution and methodology to innovate in manufacturing processes of incremental sheet metal forming is shown in this paper. Through the methodology Product design specification (PDS) as a practical and effective solution, describes the design step, specific requirements, materials and building process to achieve a device's architecture for a sheet metal deformation by two-point method Die less - DPIF. The selection, simplification and functionality becomes a fundamental objective for design engineers. © 2014 IEEE.
Barriers and success factors in lean construction implementation-survey in pilot context
(Lean Construction, 2015-07-31) Cano, Sandra; Botero- B, Luis-F; Delgado, Jonathan; RUBIANO, OSCAR; Universidad EAFIT. Departamento de Ingeniería Civil; Gestión de la Construcción
The study identifies a set of barriers and critical success factors (CSF) involved in the implementation of Lean Construction (LC) through three phases: Literature's Collection, with analysis and obtained information processing
Technological advances in computer science that define maintenance concerns in industry 4.0 in Colombia
(IOP PUBLISHING LTD, 2020-01-01) Dueas Ramírez, L.M.; Villegas López, G.A.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
Maintenance during industrial development has evolved and adapted to each challenge presented. The progress and development of computer science have opted for the massive use of information and communication technologies that arise in industrial processes generating new possibilities in maintenance management and operation. In Colombia, public and private organizations have carried out exhaustive studies on the use and maturation of technology in different industrial sectors. These studies provide valuable information on the technological progress of the country and the gaps that exist to achieve a competitive country globally. These data were analyzed and purchased with the relevance that maintenance has in Colombian industries and with current maintenance management techniques focused on improving decision making within organizations. This research establishes, within a timeline, the concerns that in the short, medium and long term should meet the maintenance in the so-called industry 4.0 in Colombia contributing to the country's industry in improving one of its nerve processes to have companies sustainable and competitive. © Published under licence by IOP Publishing Ltd.
Efecto de un sistema de evaluación de ambiente virtual sobre el rendimiento académico en un curso de Estática en ingeniería
(Latin American and Caribbean Consortium of Engineering Institutions, 2018-01-01) Pérez J.L.B.; Ochoa J.L.R.; Cadavid A.R.; Calderon J.P.R.; Garcia C.A.R.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
The engineering department of EAFIT University have developed and implemented an evaluation and training virtual system directed to the engineering students that take the Statics course. The system allows the students of several engineering programs to execute different exercises about specific topics included in the syllabus. The system also allows assessing the students' knowledge through weekly quizzes. With the implementation of the evaluation system, the engineering department aimed at improving the academic performance and the learning process of the students. This paper presents the results of a structural equation modeling analysis. The variables included in the analysis were; time of use of the system, results in quizzes and midterm exams grades assigned by the lecturers. The purpose of the analyses was to test the effect of time of use of the system and grades in the quizzes on academic performance represented by midterm grades (paper-based format). The analysis was performed with the data obtained from both, the virtual system and the course grades during year 2014. The findings suggest that both the time of use of the virtual system and good results in the quizzes have a positive influence on the midterm exams results. Therefore, it is concluded that the use of the virtual evaluation system has a positive effect on the students' academic performance. © 2018 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.
Creativity and job tension in experiential learning
(IEEE, 2018-01-01) Pablo Roman-Calderon, Juan; Esteban Acevedo-Jaramillo, Manuel; Esteban Escalante, Juan; Arias, Alejandro; Aguilar-Barrientos, Sara; Barbosa, Jaime; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
This work-in-progress research paper presents a study on employability skills. Employability or soft skills refer to personality traits, attitudes and behavior that are complementary to professional knowledge. These skills are part of a series of competencies that are intertwined with the engineer's technical work [1]. A high percentage of job success depends on employability skills [2]. A gap exists between the attributes of engineering graduates and company requirements [3]. Experiential learning can develop a myriad of skills required by the workplace. Universidad EAFIT, located in Medellin (Colombia), has developed an experiential learning program called KRATOS. KRATOS was sent an invitation to participate in an international competition that implied designing and building a solar/ electric powered vehicle. Think creatively is a competency that is important for engineering practice across areas, disciplines and countries [1]. Although student competitions that include design activities may enhance a passion for engineering, they can also have negative emotional consequences [4] (i.e. job tension). Using the structural equation modeling technique, the authors of this study analyzed the responses of 334 undergraduate students. The results of the study indicate that job tension significantly decreased over time, whereas no significant change was detected in terms of creativity.
RELIABILITY OF A CONCEPT INVENTORY TO DETERMINE THE LEVEL OF STUDENTS IN STATICS
(IEEE, 2018-01-01) Restrepo Garcia, Carlos Andres; Barbosa Perez, Jaime Leonardo; Restrepo Ochoa, Jorge Luis; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
Basic core courses in engineering are often taught and assessed only through procedural approaches, neglecting the conceptual grounds of the subject. In an effort to change that, a Concept Inventory test was applied to 195 students at Eafit University enrolled in Statics. All of the students took the test inside in the campus facilities and were monitored during the whole session to make sure they did not share information. The students took a Computer-Based Test of the Concept Inventory. Three new items were added to the original test of 27 questions, in order to improve the reliability of two specific groups of concepts. For the test was found a mean of 9.7 and a standard deviation of 5.28. For the overall test, the Cronbach's alpha coefficient was 0.81. The psychometric analyses show that all of the items in the test, except one, present an appropriate fit for discrimination and difficulty parameters of the test. Item 26 was deleted when performing the analysis of sub-scales reliability because presented abnormal value for difficulty. For the cluster of Equilibrium, it was seen that deleting this item resulted in an increase of the alpha from 0.2 to 0.36. For the sub-scale of Free-Body Diagram was seen a decrease in the reliability when two new items were added to it. All of the other sub-scales presented good reliability, most of them, above 0.5. The item-person map shows that the overall latent trait of students is lower than the overall test difficulty, meaning that most of the students found the test difficult. One of the conclusion to be drawn from the results is that the students subjected mainly to procedural approaches in teaching, do not perform well in conceptual tests. The results support the claim that Statics can be seen as a collection of concepts that can be clustered in independent groups for teaching.
Correlation between procedural and conceptual test in a statics course
(Institute of Electrical and Electronics Engineers Inc., 2019-01-01) Garcia C.A.R.; Perez J.L.B.; Ochoa J.L.R.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
Due to poor performance in Statics at Eafit University, since 2012 the Mechanical Engineering department implemented a virtual tool for the training and assessment of Statics course. Although the implementation led to better performance in the Statics course, students were still showing lack of comprehension of the basic concepts underlying the subject. The department applied a Concept Inventory test to 195 students from the second semester of 2017 in order to check if there was a correlation between the grades obtained in the class examinations and the performance in a conceptual test of Statics. The Concept Inventory was applied one week before the final examination and it was held inside the University facilities. The students were monitored all the time. For the course examinations were taken only three out of the four partial exams, they were computed and then compared to the results of the concept inventory. The results show that almost all the students with the highest grades in the class performed above the mean in the Concept Inventory. The overall mean for the conceptual test was 9.27 and the standard deviation was 5.28. The course grades were discriminated by career and an Analysis of Variance was conducted to determine if there were significant differences among the groups. A correlation analysis suggests that there is not a strong correlation between the course grades and the concept inventory results. One possible explanation for this can be due to the fact that the regular teaching method for these kind of basic courses in engineering in the University is merely procedural and problem-solving oriented, conceptual approaches are often neglected in both teaching and assessment. © 2018 IEEE.
Dynamic measurements on a Kaplan turbine: Model - Prototype comparison
(Institute of Physics Publishing, 2019-01-01) Angulo M.; Lucino C.; Botero F.; Rivetti A.; Liscia S.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
The purpose of this paper is to validate in prototype, the results related to the description of dynamic behaviour obtained in a Kaplan turbine model. A comparative analysis between model and prototype measurement at homologous operation conditions is presented. The phenomena of interest are tip vortex cavitation development and rotor stator interaction (rsi), associated to operation at high power outputs. The selection of suitable signal processing tools allows a clear identification of the role played by the modulation of the main rsi frequencies on cavitation phenomena. The comparison between pressure acceleration measurements on model and prototype at draft tube wall are consistent, both in time and frequency domain analysis. The acceleration measurement at the draft tube wall (manhole) is suggested as a trustworthy dynamic indicator for prediction (model) and monitoring (prototype) purposes. © 2019 Published under licence by IOP Publishing Ltd.
Reliability of a concept inventory to determine the level of students in statics
(Institute of Electrical and Electronics Engineers Inc., 2019-01-01) Garcia C.A.R.; Perez J.L.B.; Ochoa J.L.R.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)
Basic core courses in engineering are often taught and assessed only through procedural approaches, neglecting the conceptual grounds of the subject. In an effort to change that, a Concept Inventory test was applied to 195 students at Eafit University enrolled in Statics. All of the students took the test inside in the campus facilities and were monitored during the whole session to make sure they did not share information. The students took a Computer-Based Test of the Concept Inventory. Three new items were added to the original test of 27 questions, in order to improve the reliability of two specific groups of concepts. For the test was found a mean of 9.7 and a standard deviation of 5.28. For the overall test, the Cronbach's alpha coefficient was 0.81. The psychometric analyses show that all of the items in the test, except one, present an appropriate fit for discrimination and difficulty parameters of the test. Item 26 was deleted when performing the analysis of sub-scales reliability because presented abnormal value for difficulty. For the cluster of Equilibrium, it was seen that deleting this item resulted in an increase of the alpha from 0.2 to 0.36. For the sub-scale of Free-Body Diagram was seen a decrease in the reliability when two new items were added to it. All of the other sub-scales presented good reliability, most of them, above 0.5. The item-person map shows that the overall latent trait of students is lower than the overall test difficulty, meaning that most of the students found the test difficult. One of the conclusion to be drawn from the results is that the students subjected mainly to procedural approaches in teaching, do not perform well in conceptual tests. The results support the claim that Statics can be seen as a collection of concepts that can be clustered in independent groups for teaching. © 2018 IEEE.

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