El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / In the mining industry, the mining cycle is a very important part in the operating stage of every mining unit. Through the exploitation method used, the mining cycle provides mineral ore, which subsequently undergoes various metallurgical processes and its commercialization and thereby generates profits to the mining company. Currently, within this cycle, the hauling and transportation stages are those that have a lower efficiency with respect to the drilling and blasting stages. Therefore, the sector is always seeking effective ways to optimize these processes, reduce downtime and increase productivity. Six Sigma is a technique that allows for the continuous process improvement. In this study, the factors that generate inefficiency in the hauling cycle are determined, and alternatives are implemented to solve the main problem and improve the operations cycle.

В диссертации рассмотрены технология производства стали, мероприятия по уходу за футеровкой конвертеров и их виды, а также обзор механического оборудования конвертерного отделения КЦ №1 АО «ЕВРАЗ НТМК». Представлен расчет оптимальной стойкости футеровки конвертеров, выплавляющих сталь, также произведены расчеты, показывающие возможность оптимизации межремонтных сроков оборудования конвертерного отделения при максимальной загрузке. Практическая значимость исследования и направления развития заключаются в возможности применения мероприятий на любом металлургическом предприятии, эксплуатирующем кислородные конвертеры. / The dissertation examines steel production technology, measures for the care of converter linings and their types, as well as an overview of the mechanical equipment of the converter department of EVRAZ NTMK JSC. A calculation of the optimal durability of the lining of converters that smelt steel is presented; calculations have also been made showing the possibility of optimizing the turnaround time of the converter department equipment at maximum load. The practical significance of the research and directions of development lie in the possibility of applying the measures at any metallurgical enterprise operating oxygen converters.

Made available in DSpace on 2016-04-04T18:31:33Z (GMT). No. of bitstreams: 1 Mauricio Becker.pdf: 1680814 bytes, checksum: e32eecc9e8f4e602513a2049aa488491 (MD5) Previous issue date: 2012-12-03 / In the current globalized and connected context where companies and organizations increasingly rely on their information technology infrastructure for business continuity, such critical systems and applications need to be available and operational for end users and customers almost twenty-four hours per day over the three hundred sixty-five days of the year. In view of this, this research sought to identify the state of the art in terms of technologies for high availability computing environments and how best practice guides for IT Governance & Management can help to maintain available and operational the business critical systems. As a complement, it sought through the application of a survey research to understand the existing IT practices in one of three states with greatest economic importance in the Brazilian Northeast area. The study was conducted among December 2011 and March 2012 and aimed to evaluate current investments in IT resources, identify the main causes of unplanned downtimes and measure their impacts. From the data analysis it was possible to identify improvement opportunities regarding infrastructure, people, processes and services in order to minimize the unavailability of business critical systems for companies and organizations. / No atual contexto globalizado e conectado, as empresas e organiza??es dependem cada vez mais de suas infraestruturas de tecnologia da informa??o para a continuidade de seus neg?cios. Por esse motivo, tais sistemas e aplica??es cr?ticos ?s organiza??es necessitam estar dispon?veis e operacionais aos usu?rios internos e clientes por praticamente vinte e quatro horas por dia ao longo dos trezentos e sessenta e cinco dias do ano. Diante disto, esta pesquisa buscou apreender o estado da arte em termos de tecnologias para ambientes computacionais de alta disponibilidade e como guias de melhores pr?ticas de Governan?a e Gerenciamento de TI podem contribuir para manterdispon?veis e operacionais os sistemas cr?ticos ao neg?cio. Como complemento, buscou por meio da aplica??o de um survey compreender a pr?tica de TI existente em um dos tr?s Estados do nordeste brasileiro de maior relev?ncia econ?mica. O estudo foi realizado entre dezembro de 2011 e mar?o de 2012 e teve por objetivos avaliar os atuais investimentos em recursos de TI, mensurar os impactos e identificar as principais causas das paradas n?o programadas. Da an?lise dos dados, foi poss?vel apontar as oportunidades de melhoria no que tange infraestrutura, pessoas, processos e servi?os visando minimizar a indisponibilidade dos sistemas cr?ticos ao neg?cio de empresas e organiza??es.