Examinando por Materia "Proposals"
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Ítem An Automatic Merge Technique to Improve the Clustering Quality Performed by LAMDA(Institute of Electrical and Electronics Engineers Inc., 2020-01-01) Morales, Luis; Aguilar, Jose; Morales, Luis; Aguilar, Jose; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesClustering is a research challenge focused on discovering knowledge from data samples whose goal is to build good quality partitions. In this paper is proposed an approach based on LAMDA (Learning Algorithm for Multivariable Data Analysis), whose most important features are: a) it is a non-iterative fuzzy algorithm that can work with online data streams, b) it does not require the number of clusters, c) it can generate new partitions with objects that do not have enough similarity with the preexisting clusters (incremental-learning). However, in some applications, the number of created partitions does not correspond with the number of desired clusters, which can be excessive or impractical for the expert. Therefore, our contribution is the formalization of an automatic merge technique to update the cluster partition performed by LAMDA to improve the quality of the clusters, and a new methodology to compute the Marginal Adequacy Degree that enhances the individual-cluster assignment. The proposal, called LAMDA-RD, is applied to several benchmarks, comparing the results against the original LAMDA and other clustering algorithms, to evaluate the performance based on different metrics. Finally, LAMDA-RD is validated in a real case study related to the identification of production states in a gas-lift well, with data stream. The results have shown that LAMDA-RD achieves a competitive performance with respect to the other well-known algorithms, especially in unbalanced benchmarks and benchmarks with an overlapping of around 9%. In these cases, our algorithm is the best, reaching a Rand Index (RI) >98%. Besides, it is consistently among the best for all metrics considered (Silhouette coefficient, modification of the Silhouette coefficient, WB-index, Performance Coefficient, among others) in all case studies analyzed in this paper. Finally, in the real case study, it is better in all the metrics.Ítem Metodología para la evaluación de propuestas, análisis de licitaciones para la futura gestión de proyectos en Maple Oil Tools S.A.S. apoyados en la metodología del PMI para los grupos de procesos de inicio y planeación(Universidad EAFIT, 2022) Chavarría Jiménez, Alejandro; Salazar Gómez, Francisco Javier; Giraldo Hernández, Gina MaríaThe main objective of the research was based on designing a methodology for the evaluation of proposals and analysis of tenders for the future management of projects in MAPLE OIL TOOLS S.A.S., supported by the PMI methodology for the groups of initiation and planning processes. Based on observations and conversations with management, it is inferred that the organization has shortcomings that cause the expected results not to be obtained in the area of management of the projects undertaken. Under this order of ideas, the specific objectives were oriented to diagnose the strengths, opportunities, weaknesses and threats of the studied process; characterize the basic guidelines for the group of initiation and planning processes; formulate the strategy for the process; define the formats, procedures, tools and techniques that support the process and carry out the economic-financial feasibility study of the formulated strategy. In relation to the methodology used, the work was framed in the quantitative paradigm with documentary support, following for the collection of data (both primary and secondary) the methods: analytical-synthetic, the documentary review and the observation method. Likewise, the research used the SWOT matrix and the PMI development tool as data analysis techniques; all of the above was essential to later obtain the synthesized information. Finally, regarding the conclusions of the investigation, it stands out that the design of a methodology for the management of projects for the evaluation of the proposals and tenders that can be carried out by MAPLE OIL TOOLS SAS, can allow the optimization of the processes in the area through the implementation of the 10 knowledge areas of the PMI tool, based on the initiation and planning processes, so it is recommended that the organization follow the 10 knowledge areas of this tool for the emanated projects.Ítem Propuesta de mejoramiento en los puntos críticos en un centro de salvamento de una aseguradora en Colombia(Universidad EAFIT, 2022) Quiceno Zapata, Lucía; Campuzano Betancur, Juan Andrés; Tirado Gallego, Luis Fernando