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Dissertations |
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1
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PATRICIA FREDERICO
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Economically optimal mix of raw materials in blast furnaces using discrete event simulation and the linear programming model
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Advisor : EMERSON JOSE DE PAIVA
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COMMITTEE MEMBERS :
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EDUARDO MIGUEL DA SILVA
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EMERSON JOSE DE PAIVA
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TARCISIO GONCALVES DE BRITO
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Data: Feb 17, 2022
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Show Abstract
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Blast furnaces are continuous production equipment intended to melt and reduce iron ore in the presence of charcoal or coke and fluxes, for the production of pig iron. Maintaining the continuous supply of raw materials is a critical and relevant factor in this process. In addition, the selection and preparation of these raw materials are of great importance for the steel production strategy, as they directly impact the quality of the product produced and the associated cost. In order to optimize the production of this equipment, maintaining its continuous supply and competitive price, this work aims to investigate the supply process of the blast furnaces, especially the unloading of charcoal, contemplating from its reception, unloading and supply of the silos. , until its storage in the cells, and identify the ideal mix of raw materials that guarantee the quality of the final product with lower production costs. The analysis method was based on a hybrid approach between modeling and simulation of discrete events, using the Promodel software, and optimization, linked to linear programming, from a Linear Programming model. The result obtained with the simulation was the best visualization of the unloading system, thus enabling corrective actions to be taken in the input configuration of vehicles transporting charcoal, in order to optimize their unloading and, consequently, guarantee the supply of material. press steadily. In addition, mathematical modeling and linear programming made it possible to study the best ore mix option for load configuration, linking commercial conditions of cost and availability and appropriate chemical composition restrictions, which were proven through tests with loads and real settings.
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2
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HATHOS GARCIA DIAS
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PRIORITIZATION OF BEST PRACTICES OF PROJECT MANAGEMENT IN THE WORKS OF A FEDERAL PUBLIC UNIVERSITY
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Advisor : CARLOS AUGUSTO DE SOUZA OLIVEIRA
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COMMITTEE MEMBERS :
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CARLOS AUGUSTO DE SOUZA OLIVEIRA
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CARLOS EDUARDO SANCHES DA SILVA
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KÍVIA MOTA NASCIMENTO
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TABATA NAKAGOMI FERNANDES PEREIRA
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Data: Jun 29, 2022
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Show Abstract
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Brazilian public works are generally viewed negatively by the population, this image is mainly linked to construction stoppages, delays, extrapolation of costs and poor quality. Efficient project management has favored public organizations in improving the performance of construction management. This dissertation presents a proposal to prioritize the implementation best practices of project management practices as a way to improve the management processes of the works of a federal public university. The research used the Soft System Methodology (SSM) as the main methodology, supported by the application of a Systematic Literature Review (SLR) and the GUT Matrix to prioritize good practices. A diagnosis of the main problems of the institution that are related to the management of the works was carried out. Aided by SLR, a conceptual model was built, containing 42 (forty-two) good practices applicable in public works, which can be used as a reference in future research on the subject. This model was validated by experts in the field through a questionnaire, which pointed out the most important good practices for the investigated context. Finally, the GUT Matrix tool was applied, which used the criteria of Severity, Urgency and Tendency, based on the evaluation of professionals who work directly with the builds, to propose good practices as priorities: (1st) “qualitative risk analysis” , (2nd) “requirements analysis”, (3rd) “contingency plan”, (4th) “stakeholder analysis”; (5th) “quality plan”; (6th) “analysis of the critical path method”; (7th) “project management models”; (8th) “lessons learned; (9th) “progress meetings”; (10th) “Project Management Software” and (11th) “Business Information Modeling”. Based on the order of prioritization presented in this dissertation, the administration of the institution will have greater basis to make decisions that aim to improve the management of the works carried out on the campus, aiming to reduce delays in the delivery of works and to have greater efficiency in the work performed by the servers.
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3
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THULIO EUGENIO PORTES DE ALMEIDA RICOMINI
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Application of the Analytic Hierarchy Process in prioritizing customer value in the software development process
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Advisor : ANA CAROLINA OLIVEIRA SANTOS
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COMMITTEE MEMBERS :
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ANA CAROLINA OLIVEIRA SANTOS
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HENRIQUE DUARTE CARVALHO
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HUGO JOSE RIBEIRO JUNIOR
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ROBERTO SILVA NETTO
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Data: Jul 18, 2022
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Show Abstract
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For the success in software development it is necessary to balance the objectives of suppliers with the needs of their customers; in this context, this work explores the prioritization of the dimensions of value for the customer in the development of software for fuel stations, being determined the main dimensions of value in the given context, as well as the division of dimensions into three subcriteria each, approaching the prioritization model of company decision-makers to the criteria of their customers. Thus, this research aims to present the main dimensions of value to the software customer for gas stations, comparing priorities with decision-makers and consumers, and presenting a value prioritization model for software suppliers for gas stations. For this, this work uses a systematic review of the literature to delimit the main dimensions of value according to the existing literature, answering how the value can be measured, what its main dimensions are, and what is the definition of value in the context of software development; following the dimensions are subdivided into three subcriteria each, the dimensions next to the subcriteria form the AHP model applied to 12 specialists divided between 6 decision-makers and 6 customers of a software company for posts, priorities are evaluated between the 12 responses and then between the two groups of decision-makers and customers. The available resource dimensions, costs, and delivery time are found as the main components of customer value in software development; available features are subdivided between software functionality, performance, and availability; cost subcriteria are fixed, variable and indirect costs; and delivery time was divided between deployment time, customization, and troubleshooting; the cost criterion is found as the leading dimension in the value composition for the customer, followed by the available resources and finally by the delivery time; when aggregate priorities are separated between decision-makers and customers there is a difference in prioritization, decision-makers having a greater relevance of available resources rather than costs, while customers point to costs as the main component of value; using the subcriteria is noted the availability of the software (as availability and troubleshooting time) as a point of attention for the software vendors. Finally, in the scenario of software development for gas stations, customer value is defined as the customer's qualitative perception of how well and how fast software can meet customer needs in contrast to the cost of software; there is also a need to expand research to other segments, to compare value prioritization in different user and product contexts.
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4
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EDUARDA CARVALHO PINTO COELHO
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Analysis of e-learning factors in the perception of students of engeneering courses at the Federal University of Itajubá - Campus of Itabira
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Advisor : CARLOS EDUARDO SANCHES DA SILVA
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COMMITTEE MEMBERS :
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CARLOS EDUARDO SANCHES DA SILVA
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CARLOS AUGUSTO DE SOUZA OLIVEIRA
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LUCAS GUEDES DE OLIVEIRA
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Data: Jul 25, 2022
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Show Abstract
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Considering the current reality of higher education institutions, recent research data has shown that the implementation of disciplines through distance learning is bringing benefits to both students and professors through greater flexibility in content delivery, increased standardization of teaching and the availability and accessibility of didactic learning material. In this sense, the present work seeks to identify and analyze the factors that influence the development of distance education disciplines in the opinion of the students, through a study of the application of this teaching modality cited in scientific publications and through a real verification in the place object of study. The choice of theme was justified, firstly, due to the restrictions on the movement of people and social isolation imposed by the world pandemic of COVID-19 that prevented the face-to-face functioning, not only of educational institutions, but all commercial establishments around the world. Second, due to the substantial increase in enrollments in higher education courses offered in the distance education modality, since before the emergence of the pandemic. Finally, due to personal issues of the author who experienced the experience of being a student during the pandemic period. An applied research was carried out, with an explanatory objective and a quantitative approach, which includes a Systematic Review of the Literature to identify the critical success factors in the implementation of distance learning disciplines, complemented by a data collection through an interview with the students of the institution. It was concluded that the research responds to the proposed problem, showing that the factors related to the Teacher's Technical Competencies and their Training to Work in Distance Learning, the Student's Personal Interest in the Discipline, the Didactic Material and the Teaching Platforms Used are the most important to be considered in the implementation of distance education disciplines according to the students' view, still showing which of these factors are the most important and which ones are not necessarily so important in the opinion of the students interviewed.
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5
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ELAINE CRISTINA REIS SILVA
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Relationship between school dropout and teaching practices: an exploratory case study in a higher education institution
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Advisor : TABATA NAKAGOMI FERNANDES PEREIRA
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COMMITTEE MEMBERS :
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CARLOS EDUARDO SANCHES DA SILVA
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ISABELA MAGANHA
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MONA LIZA MOURA DE OLIVEIRA
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TABATA NAKAGOMI FERNANDES PEREIRA
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Data: Aug 31, 2022
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Show Abstract
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According to the Federal Constitution of 1988, education is a heritage asset and, as such, it generates an obligation for the State to offer and guarantee quality, which implies the need for the State to invest public resources in order to meet the needs of the public. this demand. Given this scenario, school dropout is a worrying fact as it implies economic and social losses. Economic, in view of the loss of public and social investments, due to the fact that it implies the insertion of less prepared professionals in the job market. The present study is a research carried out in the advanced campus of a higher education institution in the interior of Minas Gerais, whose methodology was the case study of an exploratory nature. The research explores the relationship between school dropout and teaching practices, aiming to diagnose the scenario presented in the institution under study. As the main source of information, the evaluation reports applied at the institution were used, considering the results from the report for the year 2015/2016, in which information from the researched campus was included. Based on the results presented for the dimensions dealt with in the institutional evaluation reports, especially the one that analyzes questions related to the Policy for Teaching, Research and Extension, it can be concluded that the teaching practices adopted do not have a negative impact on the students' decision to drop out of the institution. The percentages presented in the statements evaluated in that dimension denote a high level of students' satisfaction in relation to teaching practices, contributing to the feeling of integration and belonging and reflecting on the dropout rates in the institution. As an additional result of the work, a framework was proposed whose steps can be followed in order to perform similar future works, using the CPA reports as sources of information.
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6
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NADINE TRAVAGLIA DOS SANTOS PEREIRA
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Reduction of the rework rate through the application of the DMAIC method: A case study in an industrial laundry
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Advisor : ISABELA MAGANHA
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COMMITTEE MEMBERS :
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ISABELA MAGANHA
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LEONARDO ALBERGARIA OLIVEIRA
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SIMONE CARNEIRO STREITENBERGER
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TABATA NAKAGOMI FERNANDES PEREIRA
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Data: Nov 30, 2022
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Show Abstract
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Industrial laundries, one of the representatives of the textile sector in Brazil, are an important support service for society, as they support the operation of hospitals, industries, hotels and others. However, these industries face management difficulties and have to deal with a lack of operational controls. In this sense, an integrative literature review was carried out to understand the context in which industrial laundries are inserted. The results of this review showed that there are few studies related to operational controls and the use of performance indicators to monitor the production processes of industrial laundries. Based on this result, a systematic review of the literature was conducted to analyze the use of performance indicators to control industrial laundry processes. This review focused on identifying which performance indicators are generally associated with the application of DMAIC method (define, measure¸ analyse, improve, control). DMAIC is part of the Six Sigma philosophy and serves as a standard roadmap to guide and facilitate the development of an improvement project, organizing the techniques used at each stage. The findings of the literature reviews made it possible to identify gaps and opportunities for future research in this area, among which the development of studies focused on improving production operations, the application of quality tools to improve production operations and the determination of indicators to control production operations and measure their performance. In order to contribute to fill these gaps, this work aims to reduce the rework rate in the process of cleaning the trousseau of an industrial laundry, appling the DMAIC method. The methodology adopted to achieve this was the case study, which was carried out in an industrial laundry in Belo Horizonte and the metropolitan region. The results of the case study made it possible to understand and analyze the flow of the trousseau washing process, in addition to measuring the rework rate, identifying the main causes and proposing actions to reduce it. Thus, the DMAIC method, as well as the use and development of performance indicators proved to be useful and capable of helping to improve production processes. Finally, this work had practical contributions to the laundry studied, which reduced the average percentage of rework from 3% to 1.6%, which represents savings of R$17.25 per day, and R$6295.62 per year.
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7
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RENATA SANTANA NEPOMUCENO
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Analysis of Organizational Culture through the perception of servers on the Campus of a Federal University through the application of OCAI
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Advisor : HENRIQUE DUARTE CARVALHO
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COMMITTEE MEMBERS :
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HENRIQUE DUARTE CARVALHO
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ISABELA MAGANHA
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MONA LIZA MOURA DE OLIVEIRA
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TABATA NAKAGOMI FERNANDES PEREIRA
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Data: Dec 16, 2022
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Show Abstract
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The organizational culture is built through the habits and beliefs shared in an organization, created by norms, values, attitudes and expectations of its members. In addition to representing the predominant mindset in an organization, it represents the way of thinking and acting, and the perception of its managers and employees. It is considered as an element of communication, and its study and understanding are extremely important within organizations, in search of understanding the organizational functioning. Public organizations have been becoming aware of the importance of organizational culture in institutions as a means of achieving objectives. This research was carried out with the objective of identifying and analyse the organizational culture currently perceived and the organizational culture desired by professors and technical administrative servants on the campus of a federal university. The OCAI instrument was used as a tool for diagnosing culture and, through its results, it was concluded that, as presented in the literature, the chosen tool is viable and effective in diagnosing organizational culture. It was found that there is synergy between the class of professors and administrative technicians, since their perceptions and desires regarding the organizational culture were the same. However, a discrepancy was found between the culture perceived and desired by them, which demonstrates dissatisfaction on the part of employees regarding the culture that surrounds the environment in which they carry out their activities. The results achieved indicate the need for more attention by management to a more collaborative organizational culture that values people, and the need for a possible cultural change within the organization, taking into account the perception and desires of employees.
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