Thesis (MEng)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: In recent years, the management of physical assets has become increasingly important, even more so, in asset intensive organisations. This research work presents an overall approach to quantify reliability of rolling stock assets in the rail environment. The current maintenance management system in the case studied is over-reliant on cancellations and delays as reliability measure. The objectives of this study were, therefore, to develop a scientific approach to quantify the reliability of the rolling stock fleet and to develop a maintenance planning model based on system reliability. The research methodology followed made use of failure statistics, failure distributions and the interdependence of different systems to determine the impact of component failures on the overall system reliability. This could then be used to determine the reliability of individual train sets in order to better understand their performance. The reliability measure could be used for predicting component and train set failures as well as to better understand the contribution of maintenance towards reliability, hence the term Reliability Based Maintenance. The model, validated with real data, illustrates how the reliability measure can be used to determine maintenance intervals of different train sets. Based on the results, recommendations are made in relation to future planning of the maintenance strategy. / AFRIKAANSE OPSOMMING: Die bestuur van fisiese bates het in die afgelope tyd meer belangrik geword, veral in organisasies wat afhanklik is van hulle fisiese bates. Hierdie navorsing stel ‘n metode voor wat die betroubaarheid van rollende materiaal bates in die spoor bedryf kwantifiseer deur gebruik te maak van falingstatistiek. In die huidige instandhouding bestuurstelsel van die gevallestudie word daar te veel gesteun op kansellasies en vertragings van treine as ‘n betroubaarheids meting. Daarom was die doelwitte van die navorsing om ‘n wetenskaplike benadering te ontwikkel om betroubaarheid van rollende materiaal the kwantifiseer, en om ‘n instandhouding beplannings model voor te stel, gebaseer op sisteem betroubaarheid. Die navorsingsmetodologie is gebaseer op falingstatistieke, falingverspreidings, en die interafhanklikheid van stelsels word gebruik om die invloed van komponent falings op die betroubaarheid van die totale stelsel te bepaal. Hierdie benadering word dan gebruik om die betroubaarheid van individuele treinstelle en die werksverrigting van individuele trainstelle te bepaal. Hierdie instandhouding meting kan gebruik word om falings van komponente en treinstelle te voorspel, asook om die bydrae van instandhouding tot betroubaarheid beter te verstaan, daarom genoem Betroubaarheids Gebaseerde Instandhouding. Dit is ook geïllustreer hoe die betroubaarheid meting gebruik kan word om instandhouding intervalle te bepaal. Die betroubaarheid model is met werklike data gevalideer en aanbevelings word gemaak hoe om betroubaarheid te gebruik om die toekomstige beplanning van instandhouding te doen.

Esta investigación se realizó en el Hospital Regional Lambayeque y propone un plan de mantenimiento basado en la confiabilidad para reducir costo del área electromecánica, Se realizó el diagnóstico del área, en donde se registró y codificaron 60 equipos, se realizó una auditoría de mantenimiento obteniendo 53,8%, es decir el desempeño del área se clasificó como nivel regular, resultó vital el reconocimiento de estos puntos débiles para poder repotenciar el trabajo del área, se reconoció el gasto total en mantenimientos que fue S/ 953 200.00; se realizó la medición actual de los indicadores de mantenimiento, al realizar el estudio de criticidad se encontraron a 19 activos críticos que se dieron prioridad, al mismo tiempo se utilizó la matriz AMEF, en donde se reconoció las fallas con alto NPR, en conjunto a las hojas de decisión permitieron establecer las actividades que se ejecutaran en un tiempo definido, de manera que se pueda reducir fallos, a fin de mejorar la disponibilidad de los activos, luego de elaborar la propuesta planteada basada en 8 fases se de los equipos críticos de 73% a 90%, se incrementó la confiabilidad de 83% a 94%, logró mejorar la disponibilidad además se logró prolongar el MTBF de 551 a 8837 horas, por último se realizó la evaluación económica del proyecto teniendo definido como inversión S/ 116 830,50; se obtuvo un VAN de S/ 124,306; un TIR de 40,4% y un beneficio de S/ 0.61 por cada sol invertido, lo que define como viable la propuesta. / This research was carried out at the Lambayeque Regional Hospital and proposes a maintenance plan based on reliability to reduce the cost of the electromechanical area. The area was diagnosed, where 60 pieces of equipment were produced and coded, a maintenance audit was carried out. obtaining 53.8%, that is, the performance of the area was classified as regular level, the recognition of these weak points was vital in order to repower the work of the area, the total expense in maintenance was recognized, which was S/ 953,200.00; the current measurement of the maintenance indicators was carried out, when carrying out the criticality study, 19 critical assets were found that were given priority, at the same time the AMEF matrix was extracted, where the failures with high NPR were recognized, together with the decision sheets allowed to establish the activities that will be executed in a defined time, so that failures can be reduced, in order to improve the availability of the assets, after elaborating the proposed proposal based on 8 phases of the critical equipment of 73% to 90%, reliability was increased from 83% to 94%, availability will improve, and MTBF will be improved from 551 to 8,837Bhours. Finally, the economic evaluation of the project was carried out, having defined S/116,830 as an investment. fifty; a NPV of S/ 124,306 was obtained; an IRR of 40.4% and a benefit of S/ 0.61 for each sol invested, which defines the proposal as viable.