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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Implementar Gestión del Mantenimiento para una flota de vehículos de una empresa de transporte de personas con operaciones en la sierra central del Perú / Implement Maintenance Management for a vehicle fleet of a transportation company of people with operations in the central highlands of Peru

Dávila Rojas, Nohely Cinthya 03 July 2020 (has links)
Turismo Dávila es una empresa de transporte terrestre con autorización para prestar servicio de transporte turístico y de personal a nivel nacional desde hace 5 años, en ese marco sus principales usuarios son trabajadores del sector minero. Dada la constante y creciente demanda de estos servicios, la empresa ha incrementado su flota de vehículos y ampliado su cartera de clientes. La clave para mantener y permitir el crecimiento del negocio está en brindar servicios de acuerdo a los requerimientos del cliente y con la menor siniestralidad, por eso es fundamental contar con una eficiente operatividad y disponibilidad de la flota de vehículos lo que no se está concretando en la realidad, allí parte el desarrollo de ésta investigación: plantear la implementación de una Gestión del Mantenimiento para los vehículos de la empresa de tal forma que estos puedan cumplir una función óptima bajo los parámetros solicitados y esperados por el cliente. / Turismo Dávila is a land transport company authorized to provide tourist transport service and personnel nationwide for 5 years, in this framework its main users are workers in the mining sector. Given the constant and growing demand for these services, the company has increased its vehicle fleet and expanded its client base. The key to maintaining and allowing the growth of the business is to provide services according to customer requirements and with the lowest accident rate, so it is essential to have an efficient operation and availability of the fleet of vehicles which is not being specified in the reality, there starts the development of this research: to propose the implementation of a Maintenance Management for the vehicles of the company in such a way that they can fulfill an optimal function under the parameters requested and expected by the client. / Trabajo de Suficiencia Profesional
52

Strategischer Einsatz von Monitoring bei Ingenieurbauwerken mit Anwendungsbeispielen

Hindersmann, Iris, Müller, Matthias, Kaplan, Felix 08 November 2023 (has links)
Der Wandel des Erhaltungsmanagements von Ingenieurbauwerken von einem reaktiven Vorgehen zu einem prädiktiven Lebenszyklusmanagement kann zur Erreichung einer zuverlässigen und verfügbaren Infrastruktur beitragen. Mit dem Einsatz von Monitoring besteht die Möglichkeit, zusätzliche Informationen zum Bauwerk und dessen zukünftiger Entwicklung abzuleiten. Der Einsatz von Monitoring ist komplex und kann daher über die Realisierung von Anwendungsfällen gestärkt werden. In Deutschland weit verbreitete Anwendungsfälle werden mit konkreten Beispielen dargestellt. Zusätzlich werden Anwendungsfälle mit ersten Umsetzungsbeispielen und mögliche zukünftige Anwendungen mit ihren Potenzialen skizziert. Die Möglichkeit der Zusammenführung der Anwendungsfälle in digitalen Zwillingen ist ein Zukunftsbild, welches im Rahmen des Artikels beschrieben wird.
53

Technologies for better utilisation of production process resources

Ingwald, Anders January 2009 (has links)
Most companies today are working in a global environment where competition is hard. In order to be able to survive it is essential that the companies utilise their resources as much as possible in order to keep the production cost low. Maintenance plays a crucial role because of its impact on availability, reliability, quality and life cycle cost (LCC). However, being able to use maintenance proactively so as to increase the utilisation of the production process resources requires access to proper tools and methods for deciding on what maintenance to use and to follow up maintenance impact. Consequently, the overall research problem discussed in the thesis is: How to select a maintenance policy and follow up its performance with respect to cost-effectiveness in order to improve company profitability. In order to solve this overall research problem it has been broken down into four research questions R1: How can different approaches intended for maintaining or improving production process performance assist in the identification, analysis, elimination and prevention of recurrence of problems in a production process?, R2: How should maintenance be selected on the basis of cost-effectiveness?, R3: How should the technical and financial performance of maintenance be measured in order to enable cost-effective improvements? and R4: How to access relevant data required for cost-effective decisions in maintenance?. The philosophical basis applied in the work presented in this thesis is systems theory. When looking at maintenance, it is necessary to have a wide perspective and also see the interaction between maintenance and other relevant working areas. The major contributions that have been achieved and reported in the thesis are: 1. A literature review regarding current approach abilities to identify, analyse and prevent the recurrence of problems, 2. The development of a conceptual model for measuring the maintenance impact through a set of key performance indicators indicating where and how much to invest in maintenance., 3. The development of a maintenance support system for measuring the economic/financial impact of maintenance on both operative and strategic levels, 4. The development of a model for selecting and improving maintenance policies based on cost-effectiveness. The model presented is characterised by being flexible, in the meaning that it is possible to make a selection among any types of maintenance policies., 5. The definition and description of a common database containing relevant data for maintenance management and 6. Results from an exploratory study regarding IT maturity within maintenance management in Swedish industry are presented. The main conclusion of the thesis is that the tools and methods described in this thesis can represent important elements in a system to continuously and cost-effectively improve maintenance performance and thereby better utilise the resources in the production process.
54

A maintenance strategy for a network of automated fluid management systems / by Francois Oosthuizen.

Oosthuizen, Francois January 2012 (has links)
The current economic climate in South Africa requires organisations to optimise available resources – human and otherwise – to successfully sustain business operations. This is especially true for the growing SMME sector in South Africa. Organisations utilising hydrocarbon based products for input products into their respective process - specifically fuels and lubricants – face an even greater challenge in optimising resource usage as fuel and lubricant prices have increased substantially over the last decade. Automated and advanced technological solutions to properly and effectively manage these fuel and lubricant resources must be employed within organisations. This is critical as fuel and lubricants can constitute a large part of the annual expenditure within an organisation. Such organisations can include: • Mining operations • Transport operations • Agricultural operations • Maritime operations Newcom Fluid Management has developed a Fuel & Fluid Management Solution which consists of an electronic control system and various other elements to assist organisations in managing these fuel and lubricant resources. The Newcom FMS makes use of physical hardware on the client’s site as well as an internet based software system to control, monitor and report on all fuel and lubricant usages. There is also a large human resource element behind the system which continuously maintains these remote systems such that clients can enjoy the availability of fuels and lubricants when desired. The Newcom FMS must be properly maintained and resources optimised to allow Newcom to not only make a profit, but to stay competitive in the market place by providing clients with a sustainable and available solution. Therefore a properly researched maintenance management strategy must be developed for Newcom and the Newcom FMS solution to ensure that not only the client’s resources are optimised, but also Newcom’s resources in order to maintain the Newcom FMS. The aim of this research was to: • Research the theory behind maintenance management; • Identify and develop a sustainable maintenance strategy for the Newcom FMS solution taking into account the success factors as required by Newcom; • Test the experimental strategy and the current maintenance program at current Newcom clients and capture data on the two strategies employed; • Analyse and compare the experimental data to determine the effectiveness of the experimental maintenance strategy versus the corrective strategy; • Provide the experimental maintenance strategy “product” to Newcom along with the data obtained in the experiment as well as the recommendations on the way forward with the data obtained from the experiment serving as inputs. The parameters which were measured in the experiment were: • System availability; • Strategy expenditure and • Resources usage. The parameters were selected by Newcom as being the most pertinent to their current operational environment. Achieving success in these areas would effectively increase the probability of a successful maintenance management strategy for Newcom. • The experimental data was captured for the period the experiment was executed for. This data was analysed, the results were interpreted a / Thesis (MIng (Development and Management Engineering))--North-West University, Potchefstroom Campus, 2013.
55

A maintenance strategy for a network of automated fluid management systems / by Francois Oosthuizen.

Oosthuizen, Francois January 2012 (has links)
The current economic climate in South Africa requires organisations to optimise available resources – human and otherwise – to successfully sustain business operations. This is especially true for the growing SMME sector in South Africa. Organisations utilising hydrocarbon based products for input products into their respective process - specifically fuels and lubricants – face an even greater challenge in optimising resource usage as fuel and lubricant prices have increased substantially over the last decade. Automated and advanced technological solutions to properly and effectively manage these fuel and lubricant resources must be employed within organisations. This is critical as fuel and lubricants can constitute a large part of the annual expenditure within an organisation. Such organisations can include: • Mining operations • Transport operations • Agricultural operations • Maritime operations Newcom Fluid Management has developed a Fuel & Fluid Management Solution which consists of an electronic control system and various other elements to assist organisations in managing these fuel and lubricant resources. The Newcom FMS makes use of physical hardware on the client’s site as well as an internet based software system to control, monitor and report on all fuel and lubricant usages. There is also a large human resource element behind the system which continuously maintains these remote systems such that clients can enjoy the availability of fuels and lubricants when desired. The Newcom FMS must be properly maintained and resources optimised to allow Newcom to not only make a profit, but to stay competitive in the market place by providing clients with a sustainable and available solution. Therefore a properly researched maintenance management strategy must be developed for Newcom and the Newcom FMS solution to ensure that not only the client’s resources are optimised, but also Newcom’s resources in order to maintain the Newcom FMS. The aim of this research was to: • Research the theory behind maintenance management; • Identify and develop a sustainable maintenance strategy for the Newcom FMS solution taking into account the success factors as required by Newcom; • Test the experimental strategy and the current maintenance program at current Newcom clients and capture data on the two strategies employed; • Analyse and compare the experimental data to determine the effectiveness of the experimental maintenance strategy versus the corrective strategy; • Provide the experimental maintenance strategy “product” to Newcom along with the data obtained in the experiment as well as the recommendations on the way forward with the data obtained from the experiment serving as inputs. The parameters which were measured in the experiment were: • System availability; • Strategy expenditure and • Resources usage. The parameters were selected by Newcom as being the most pertinent to their current operational environment. Achieving success in these areas would effectively increase the probability of a successful maintenance management strategy for Newcom. • The experimental data was captured for the period the experiment was executed for. This data was analysed, the results were interpreted a / Thesis (MIng (Development and Management Engineering))--North-West University, Potchefstroom Campus, 2013.
56

Contribuição à modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas em empreendimentos de exploração florestal / Contribution for modeling an unpaved roads maintenance management system within an entrepreneurship of forestry exploration

Pinto, Paulo Ricardo Rodrigues January 2009 (has links)
Tudo que merece ser mantido e preservado merece ser gerenciado e o gerenciamento da manutenção alcança seu ápice quando tratado na forma de sistema. A sistematização do gerenciamento da manutenção, em que pese ser uma abordagem relativamente recente na ciência e envolver a aproximação dos níveis estratégico e operacionais, é considerada essencial na busca de vantagens competitivas, redução de custos, confiabilidade na produção e prestação de serviços. Desde que as rodovias são consideradas um patrimônio e como tal digno de preservação e gerenciamento, mister que essa gerência da manutenção seja conduzida de forma sistêmica. As rodovias, no caso presente, são as rodovias não pavimentadas localizadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Esse estudo apresenta uma proposta conceitual para a modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Nesse processo, o estudo tratará de sistemas de gerenciamento da manutenção de rodovias, particularizando os entendimentos de sistemas, gerenciamento e manutenção aplicados às rodovias, assim como apresentará uma visão particularizada da evolução do gerenciamento da manutenção e tratará das abordagens do gerenciamento da manutenção em nível de rede e de projetos. As rodovias não pavimentadas é outro tópico tratado destacando-se as abordagens relacionadas à caracterização e importância dessas rodovias, o conceito de serventia aplicado às rodovias não pavimentadas, os mecanismos de deterioração, modelos de previsão de desempenho e alternativas de manutenção para essas vias, assim como benefícios associados à manutenção, caminhos para priorização seja das intervenções, seja para a seleção das vias, e análises econômicas e financeiras. Outra seção tratará dos empreendimentos florestais de exploração de celulose, oferecendo uma visão geral desses empreendimentos, um panorama do sistema de colheita florestal, trará uma discussão sobre a manutenção de rodovias em empreendimentos privados e as vantagens econômicas de gerenciar a manutenção de redes de rodovias não pavimentada. Todos os conceitos tratados anteriormente são os fundamentos do sistema de gerenciamento da manutenção de rodovias não pavimentadas que se propõe, entre os quais a utilização da ferramenta ‘Relational Unified Process’, uma proposta para condução do processo de gerenciamento da rede não pavimentada, sugestões de políticas e alternativas de intervenções de manutenção, e formas de encaminhamento para a apropriação de dados relativos à frota de veículos e à condição da rede de rodovias. Apresentam-se, ainda, propostas de árvores de decisão para seleção de intervenções de manutenção, conforme a extensão e severidade dos defeitos identificados. / Everything that deserves to be maintained and preserved, deserves to be managed, and the maintenance management reaches its highest level when we deal with it as a system. The systematization of the maintenance management – although it is quite a recent approach as a subject of science that demands putting the strategic and operational levels closer – is considered essential in the search for certain competitive advantages like cost reduction, production pipeline reliability, and service providing. Since roads are viewed as assets worth preserving and managing, such managing has to be carried out in a systemic way. The roads here are the unpaved roads located into forestry exploration entrepreneurship for cellulose extraction. This research presents a conceptual proposal to model an unpaved road maintenance management system located into forestry exploration entrepreneurship for cellulose extraction. This research deals with road maintenance management systems, management and maintenance applied to roads as well as presents a particular point of view related to the evolution of the road maintenance management, and it also deals with the two approaches related to maintenance management, the network-level and the project-level approaches. This work also deals with unpaved roads, characterization and importance of such roads, an approach on the concept of serviceability applied to unpaved roads, mechanisms of deterioration, models to forecast performance, and alternatives of interventions addressed to maintain those roads. It also pinpoints benefits associated with the maintenance, ways to priorize interventions or roads, and some economic and financial analysis. It also works with the forestry exploration entrepreneurship for cellulose extraction, shows a broad vision of that entrepreneurship, approaches the forestry harvesting system, brings a brief discussion about the road maintenance under private entrepreneurships and discusses economic advantages of managing the maintenance of unpaved road network. All concepts previously discussed are the foundation of the proposed unpaved road maintenance management system. Among such concepts is the use of Relational Unified Process tool, a proposal addressed to carry on the unpaved road network management process, suggestions for maintenance polices and alternatives of maintenance interventions, and ways of collecting data related to the vehicle fleet and the condition of the road network. At the end, it presents some decision trees addressed to the selection of maintenance interventions, such trees take into account the length and the severity of the defects identified.
57

Contribuição à modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas em empreendimentos de exploração florestal / Contribution for modeling an unpaved roads maintenance management system within an entrepreneurship of forestry exploration

Pinto, Paulo Ricardo Rodrigues January 2009 (has links)
Tudo que merece ser mantido e preservado merece ser gerenciado e o gerenciamento da manutenção alcança seu ápice quando tratado na forma de sistema. A sistematização do gerenciamento da manutenção, em que pese ser uma abordagem relativamente recente na ciência e envolver a aproximação dos níveis estratégico e operacionais, é considerada essencial na busca de vantagens competitivas, redução de custos, confiabilidade na produção e prestação de serviços. Desde que as rodovias são consideradas um patrimônio e como tal digno de preservação e gerenciamento, mister que essa gerência da manutenção seja conduzida de forma sistêmica. As rodovias, no caso presente, são as rodovias não pavimentadas localizadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Esse estudo apresenta uma proposta conceitual para a modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Nesse processo, o estudo tratará de sistemas de gerenciamento da manutenção de rodovias, particularizando os entendimentos de sistemas, gerenciamento e manutenção aplicados às rodovias, assim como apresentará uma visão particularizada da evolução do gerenciamento da manutenção e tratará das abordagens do gerenciamento da manutenção em nível de rede e de projetos. As rodovias não pavimentadas é outro tópico tratado destacando-se as abordagens relacionadas à caracterização e importância dessas rodovias, o conceito de serventia aplicado às rodovias não pavimentadas, os mecanismos de deterioração, modelos de previsão de desempenho e alternativas de manutenção para essas vias, assim como benefícios associados à manutenção, caminhos para priorização seja das intervenções, seja para a seleção das vias, e análises econômicas e financeiras. Outra seção tratará dos empreendimentos florestais de exploração de celulose, oferecendo uma visão geral desses empreendimentos, um panorama do sistema de colheita florestal, trará uma discussão sobre a manutenção de rodovias em empreendimentos privados e as vantagens econômicas de gerenciar a manutenção de redes de rodovias não pavimentada. Todos os conceitos tratados anteriormente são os fundamentos do sistema de gerenciamento da manutenção de rodovias não pavimentadas que se propõe, entre os quais a utilização da ferramenta ‘Relational Unified Process’, uma proposta para condução do processo de gerenciamento da rede não pavimentada, sugestões de políticas e alternativas de intervenções de manutenção, e formas de encaminhamento para a apropriação de dados relativos à frota de veículos e à condição da rede de rodovias. Apresentam-se, ainda, propostas de árvores de decisão para seleção de intervenções de manutenção, conforme a extensão e severidade dos defeitos identificados. / Everything that deserves to be maintained and preserved, deserves to be managed, and the maintenance management reaches its highest level when we deal with it as a system. The systematization of the maintenance management – although it is quite a recent approach as a subject of science that demands putting the strategic and operational levels closer – is considered essential in the search for certain competitive advantages like cost reduction, production pipeline reliability, and service providing. Since roads are viewed as assets worth preserving and managing, such managing has to be carried out in a systemic way. The roads here are the unpaved roads located into forestry exploration entrepreneurship for cellulose extraction. This research presents a conceptual proposal to model an unpaved road maintenance management system located into forestry exploration entrepreneurship for cellulose extraction. This research deals with road maintenance management systems, management and maintenance applied to roads as well as presents a particular point of view related to the evolution of the road maintenance management, and it also deals with the two approaches related to maintenance management, the network-level and the project-level approaches. This work also deals with unpaved roads, characterization and importance of such roads, an approach on the concept of serviceability applied to unpaved roads, mechanisms of deterioration, models to forecast performance, and alternatives of interventions addressed to maintain those roads. It also pinpoints benefits associated with the maintenance, ways to priorize interventions or roads, and some economic and financial analysis. It also works with the forestry exploration entrepreneurship for cellulose extraction, shows a broad vision of that entrepreneurship, approaches the forestry harvesting system, brings a brief discussion about the road maintenance under private entrepreneurships and discusses economic advantages of managing the maintenance of unpaved road network. All concepts previously discussed are the foundation of the proposed unpaved road maintenance management system. Among such concepts is the use of Relational Unified Process tool, a proposal addressed to carry on the unpaved road network management process, suggestions for maintenance polices and alternatives of maintenance interventions, and ways of collecting data related to the vehicle fleet and the condition of the road network. At the end, it presents some decision trees addressed to the selection of maintenance interventions, such trees take into account the length and the severity of the defects identified.
58

Contribuição à modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas em empreendimentos de exploração florestal / Contribution for modeling an unpaved roads maintenance management system within an entrepreneurship of forestry exploration

Pinto, Paulo Ricardo Rodrigues January 2009 (has links)
Tudo que merece ser mantido e preservado merece ser gerenciado e o gerenciamento da manutenção alcança seu ápice quando tratado na forma de sistema. A sistematização do gerenciamento da manutenção, em que pese ser uma abordagem relativamente recente na ciência e envolver a aproximação dos níveis estratégico e operacionais, é considerada essencial na busca de vantagens competitivas, redução de custos, confiabilidade na produção e prestação de serviços. Desde que as rodovias são consideradas um patrimônio e como tal digno de preservação e gerenciamento, mister que essa gerência da manutenção seja conduzida de forma sistêmica. As rodovias, no caso presente, são as rodovias não pavimentadas localizadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Esse estudo apresenta uma proposta conceitual para a modelagem de um sistema de gerenciamento da manutenção de rodovias não pavimentadas no âmbito de empreendimentos de exploração florestal para extração de celulose. Nesse processo, o estudo tratará de sistemas de gerenciamento da manutenção de rodovias, particularizando os entendimentos de sistemas, gerenciamento e manutenção aplicados às rodovias, assim como apresentará uma visão particularizada da evolução do gerenciamento da manutenção e tratará das abordagens do gerenciamento da manutenção em nível de rede e de projetos. As rodovias não pavimentadas é outro tópico tratado destacando-se as abordagens relacionadas à caracterização e importância dessas rodovias, o conceito de serventia aplicado às rodovias não pavimentadas, os mecanismos de deterioração, modelos de previsão de desempenho e alternativas de manutenção para essas vias, assim como benefícios associados à manutenção, caminhos para priorização seja das intervenções, seja para a seleção das vias, e análises econômicas e financeiras. Outra seção tratará dos empreendimentos florestais de exploração de celulose, oferecendo uma visão geral desses empreendimentos, um panorama do sistema de colheita florestal, trará uma discussão sobre a manutenção de rodovias em empreendimentos privados e as vantagens econômicas de gerenciar a manutenção de redes de rodovias não pavimentada. Todos os conceitos tratados anteriormente são os fundamentos do sistema de gerenciamento da manutenção de rodovias não pavimentadas que se propõe, entre os quais a utilização da ferramenta ‘Relational Unified Process’, uma proposta para condução do processo de gerenciamento da rede não pavimentada, sugestões de políticas e alternativas de intervenções de manutenção, e formas de encaminhamento para a apropriação de dados relativos à frota de veículos e à condição da rede de rodovias. Apresentam-se, ainda, propostas de árvores de decisão para seleção de intervenções de manutenção, conforme a extensão e severidade dos defeitos identificados. / Everything that deserves to be maintained and preserved, deserves to be managed, and the maintenance management reaches its highest level when we deal with it as a system. The systematization of the maintenance management – although it is quite a recent approach as a subject of science that demands putting the strategic and operational levels closer – is considered essential in the search for certain competitive advantages like cost reduction, production pipeline reliability, and service providing. Since roads are viewed as assets worth preserving and managing, such managing has to be carried out in a systemic way. The roads here are the unpaved roads located into forestry exploration entrepreneurship for cellulose extraction. This research presents a conceptual proposal to model an unpaved road maintenance management system located into forestry exploration entrepreneurship for cellulose extraction. This research deals with road maintenance management systems, management and maintenance applied to roads as well as presents a particular point of view related to the evolution of the road maintenance management, and it also deals with the two approaches related to maintenance management, the network-level and the project-level approaches. This work also deals with unpaved roads, characterization and importance of such roads, an approach on the concept of serviceability applied to unpaved roads, mechanisms of deterioration, models to forecast performance, and alternatives of interventions addressed to maintain those roads. It also pinpoints benefits associated with the maintenance, ways to priorize interventions or roads, and some economic and financial analysis. It also works with the forestry exploration entrepreneurship for cellulose extraction, shows a broad vision of that entrepreneurship, approaches the forestry harvesting system, brings a brief discussion about the road maintenance under private entrepreneurships and discusses economic advantages of managing the maintenance of unpaved road network. All concepts previously discussed are the foundation of the proposed unpaved road maintenance management system. Among such concepts is the use of Relational Unified Process tool, a proposal addressed to carry on the unpaved road network management process, suggestions for maintenance polices and alternatives of maintenance interventions, and ways of collecting data related to the vehicle fleet and the condition of the road network. At the end, it presents some decision trees addressed to the selection of maintenance interventions, such trees take into account the length and the severity of the defects identified.
59

Improving the reliability of a chemical process plant

Tomo, Zonwabele Zweli Simon 05 June 2012 (has links)
M.Phil. / In modern society, professional engineers, technologists and technical managers are responsible for the planning, design, manufacture, maintenance and operation of the processes and systems ranging from simple processes to complex systems. The failure of these can often cause effects that range from inconvenience and irritation to severe impact on the society and its environment. Users, customers and society in general expect that products be reliable and safe at all times (Allan & Ballinton 1992). The biggest investment in any plant is, arguably, on individual plant equipment. It is therefore reasonable to give the greatest attention possible to the health and integrity of equipment that form part of the chemical process plant.Most of plant failures occur without warning and this result in equipment breakdowns, huge production losses and expensive maintenance. The reaction to plant failures has, in most cases, been a reactive maintenance which means that the plant equipment must fail before the cause of fault is investigated and the equipment is repaired. Reactive maintenance has shortcomings in that it is successful in solving problems temporarily but does not guarantee prevention of fault recurrence. Equipment and process failures waste money on unreliability problems. The question that arises is. ‘How reliable and safe is the plant during its operating life?’ This question can be answered, in part, by the use of quantitative reliability evaluation. The growing need to achieve high availability for large integrated chemical process systems demands higher levels of reliability at the operational stage. Reliability is the probability of equipment or processes to function without failure when operated correctly for a given interval of time under stated conditions. This research dissertation is aimed at developing equipment optimisation program for the chemical process plant by introducing a logical approach to managing the maintenance of plant equipment. Some relevant reliability theory is discussed and applied to the Short – Path Distillation (SPD) plant of SASOL WAX. An analysis of the failure modes and criticality helps to identify plant equipment that needs special focus during inspection.
60

Propuesta de mejora en la gestión del mantenimiento para incrementar la productividad en una empresa productora de papel higiénico institucional

Castro Rodas, Cristhiam Miguel January 2023 (has links)
La investigación se realizó en una empresa ubicada en la región Lambayeque, dedicada a producción y comercialización de papel higiénico institucional, cuya problemática es la baja productividad de su proceso productivo, debido a los paros repetitivos y repentinos de las maquinarias, generados por una inadecuada gestión de mantenimiento. Es por ello, que el objetivo general del estudio fue mejorar la gestión de mantenimiento para aumentar la productividad del proceso de elaboración de papel higiénico institucional. Se realizó un diagnóstico del proceso productivo, que consistió en la toma de tiempos de cada actividad, utilizando como herramientas de apoyo un cronómetro y la metodología Mundel; además, se aplicó una lista de verificación de la metodología 5S, un análisis de causa raíz, análisis de criticidad y se calculó los indicadores de producción y productividad. A continuación, se realizó una evaluación de alternativas y se seleccionó como propuesta un plan de mtto preventivo basado en RCM para la gestión, estimando un incremento de 5,22 a 5,55 und/op-h en la productividad de mano de obra, y un aumento de 56,98% a 60,53% en la productividad basado en la utilización y eficiencia. Asimismo, con una disponibilidad de 94,7%, se estima un incremento producción anual de 2443 unidades. Finalmente, se realizó el análisis económico y financiero de las propuestas, estimando una inversión de S/. 16 900, con un VAN de 7 460, un TIR de 44% y una relación costo-beneficio de S/. 6 435 al tercer año de su implementación, por lo que se concluye que la propuesta es viable. / The research was carried out in a company located in the Lambayeque region, dedicated to the production and commercialization of institutional toilet paper, whose problem is the low productivity of its production process, due to repetitive and sudden stoppages of machinery, generated by inadequate management of maintenance. That is why the general objective of the study was to improve maintenance management to increase the productivity of the institutional toilet paper manufacturing process. A diagnosis of the production process was carried out, which consisted of taking the times of each activity, using a stopwatch and the Mundel methodology as support tools; In addition, a checklist of the 5S methodology was applied and the production and productivity indicators were calculated. Next, an evaluation of alternatives was carried out and a preventive maintenance plan based on RCM was selected as a proposal for management, estimating an increase from 5.22 to 5.55 und / op-h in labor productivity, and a 56.98% to 60.53% increase in productivity based on utilization and efficiency. Likewise, with an availability of 94.7%, an annual production increase of 2443 units is estimated. Finally, the economic and financial analysis of the proposals was carried out, estimating an investment of S /. 16,900, with a NPV of 7,460, an IRR of 44% and a cost-benefit ratio of S /. 6,435 in the third year of its implementation, so it is concluded that the proposal is viable.

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