Thèses : « Equipment and supplies - Maintenance and repair »

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Chan, Fan, et 陳帆. « Structural and cultural change in a government service under commercialisation ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31266344.

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Powell, Lydia Charlotte. « The biofouling of reverse osmosis membranes : from characterisation to control ». Thesis, Swansea University, 2011. https://cronfa.swan.ac.uk/Record/cronfa42695.

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Membrane technology can be utilised for the high purification and desalination of water. However membrane filtration processes are commonly impeded by membrane fouling, which can lead to flux decline and an overall reduction in separation efficiency within the process. Therefore the aim of this research study was a comprehensive investigation of the issue of biofouling on industrial RO membranes through molecular biology techniques, characterisation of surface charge of foulant bacteria and RO membrane surface and AFM imaging and force measurements on clean and fouled membranes for the determination of adhesion force and micromechanical properties. The laboratories within Gwangju Institute of Science and Technology, South Korea and Swansea University, Wales were equipped for the scope of this research work. Research focused on the extraction of microbial DNA obtained from fouling layers on the surface of Reverse Osmosis Membranes obtained from the Fujairah Water and Power Plant, UAE. The use of the culture independent method of the molecular technique based on the 16S rDNA sequence and constructed gene libraries, was then used to determine the bacterial species that caused significant fouling on the RO membrane. Four bacterial species isolated from the fouling layer from the RO membrane were characterised in terms of electrophoretic mobility and zeta potential to determine the cell surface charge within various industrial relevant environments for the elucidation of cell adhesion mechanisms to the membrane surface. AFM images of virgin and fouled membranes were obtained and analysed to reveal the roughness of the surface which could influence fouling and the surface charge of the membranes were measured through the method of streaming potential at various industrial relevant environments to further elucidate the mechanisms of cell adhesion to the membrane surface. Force measurements were performed to reveal the adhesion force and elasticity values of virgin, process fouled and purposely fouled with the four bacterial isolates, to determine process behaviour in various environmental conditions. Through this research and future work, it is hoped that a rational strategy for economic and effective cleaning processes will be developed which will maintain efficient membrane operation and prolong membrane life, thus enabling the reduction of operating costs of such processes.

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Sinske, Stefan (Stefan Andreas). « A spatial decision support system for pipe break susceptibility analysis and impact assessment of municipal water distribution systems ». Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52697.

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Dissertation (PhD)--Stellenbosch University, 2002.
ENGLISH ABSTRACT: Municipal water distribution maintenance is very important for sustainable urban development. Water pipe breaks result not only in a disruption in service but also in significant loss of water, which otherwise could have been sold to the consumer. In countries where water is scarce, such as South Africa, water losses can be detrimental to the living standard of people. Water pipe breaks can furthermore cause extensive damage to nearby lower-lying properties. Existing decision support systems available in the field of water distribution system maintenance are mainly focused on leak detection and pipe rehabilitation/replacement strategy. These existing systems, however, do not address the actual causes of pipe breaks and pipe break impact is also not supported. The aim of this research is to develop a spatial decision support system (SDSS) for pipe break susceptibility analysis and impact assessment. The engineer (or public works administrator) can apply the SDSS to model the complex pipe break phenomena in the municipal water distribution system. The SDSS can identify pipes susceptible to breaking and pipes with potentially high break impact as far as water loss and damage caused to nearby property are concerned. This combined pipe break susceptibility analysis and potential impact assessment should promote more informed decision-making on preventative maintenance measures to be taken and their prioritisation. The dissertation consists offive parts. In the first part (Chapters 1-4) theories on information systems, fuzzy logic, object-oriented modelling, Unified Modelling Language (UML) and pipe break causes are presented. This literature review provides a basis on which the SDSS for pipe break susceptibility analysis and impact assessment can be developed. In the second part (Chapter 5) the general user requirements and design of the SDSS are given. The general SDSS architecture, the general system functionality and the user interface are described and designed in this part of the dissertation. The third part (Chapter 6) provides the detailed user requirements and design of the subsystems of the SDSS. Specialised functionality for pipe break susceptibility analysis and impact assessment is added to the general design of the SDSS. Subsystems are designed for analysing the pipe break susceptibility due to age, air-pocket formation and tree-root attack. Pipe break impact assessment subsystems are also designed for assessing water loss and potential damage caused to nearby property. Finally, a combined analysis subsystem is designed for combined pipe break susceptibility analysis and impact assessment. In the fourth part (Chapter 7), the SDSS is applied to the water distribution system of the Paarl Municipality to identify pipes in the network that have both high break susceptibility and also high break impact. The pipe break susceptibility analysis model of the SDSS is also tested and calibrated by comparing the model results with actual pipe break occurrence data of the study area. The final chapter (Chapter 8) contains the summary and recommendations regarding the functionality of the newly developed SDSS.
AFRIKAANSE OPSOMMING: Die instandhouding van munisipale waterverspreidingstelsels is uiters belangrik vir volhoubare stedelike ontwikkeling. Waterpypbreuke lei nie alleenlik tot onderbreking in diensverskaffing nie, maar ook tot beduidende waterverlies en verlies aan inkomste uit waterverkope. In lande waar water skaars is, soos in Suid-Afrika, kan waterverliese die lewenstandaard van die bevolking nadelig beïnvloed. Waterpypbreuke kan ook groot skade aan naby-geleë laag-liggende eiendomme aanrig. Besluitnemingstelsels tans beskikbaar op die gebied van instandhouding van waterverspreidingstelsels is hoofsaaklik gerig op lekkasie-opsporing en pyprehabilitasie- en pypvervangingstrategieë. Hierdie bestaande stelsels spreek egter nie die eintlike oorsake van pypbreuke aan nie, daar word ook nie op die impak van pypbreuke ingegaan nie. Die doelwit van hierdie navorsing is om 'n ruimtelike besluitnemingstelsel (RBS) - vir pypbreuk-risiko-analise en impakberaming te ontwikkel. Die ingenieur (of stelselbestuurder) kan met behulp van die RBS die komplekse pypbreukverskynsel in 'n munisipale waterverspreidingstelsel modelleer. Die RBS kan pype met hoë breek-potensiaal identifiseer asook pype wat, indien dit breek, groot waterverlies of skade aan naby-geleë eiendomme sal veroorsaak. Hierdie gekombineerde pypbreuk-risiko-analise en impakberaming behoort meer oordeelkundige besluitneming te bevorder deur beter prioritisering van voorkomende instandhoudingsmaatreëls en die uitvoering daarvan. Die proefskrif bestaan uit vyf dele. In die eerste deel (Hoofstukke 1-4) word die teorieë oor inligtingstelsels, 'fuzzy logic', objek-georiënteerde modellering, 'unified modelling language (UML)' en die oorsake van pypbreuke behandel. Hierdie literatuurstudie skep die basis waaruit die RBS vir pypbreukrisikobepaling en impakberaming ontwikkel sal word. In die tweede deel (Hoofstuk 5) word die algemene gebruikersbehoeftes en die ontwerp van die RBS uiteengesit. Die algemene RBS struktuur en die gebruikerskoppelvlak word in hierdie deel van die proefskrif beskryf en ontwerp. In die derde deel (Hoofstuk 6) word die gedetailleerde gebruikersbehoeftes en die ontwerp van die substelsels van die RBS uiteengesit. Gespesialiseerde funksionaliteit vir pypbreuk-risikobepaling en impakberaming is tot die algemene ontwerp van die RBS bygevoeg. Substelsels is ontwerp vir die ontleding van pypbreuk-risiko as gevolg van ouderdom, lugblaas-vorming en boomwortelaanval. Substelsels vir impakberaming is ook ontwerp om waterverlies en potensiële skade aan eiendomme vas te stel. Ten slotte word 'n gekombineerde ontledingsubstelsel vir gekombineerde pypbreuk-risikobepaling en impakberaming opgestel. In die vierde deel (Hoofstuk 7) word die RBS toegepas op die waterverspreidingstelsel van die Paarlse munisipaliteit om pype uit te ken wat beide 'n hoë breuk-risiko en 'n hoë breuk-impak bevat. Die pypbreuk-analise model van die RBS is ook getoets en gekalibreer deur die resultate van die model te vergelyk met data van werklike pypbreuke in die studiegebied. Die laaste hoofstuk (Hoofstuk 8) bevat die samevatting en die aanbevelings rakende die funksionaliteit van die voorgestelde RBS.

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Santos, William O. « An analysis of the prediction accuracy of the U.S. Navy repair turn-around time forecast model ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FSantos.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2003.
Thesis advisor(s): Robert A. Koyak, Samuel E. Buttrey. Includes bibliographical references (p. 55). Also available online.

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De, Wet Vorster Hendrik. « An analysis of the effectiveness of the asset maintenance plan at Spoornet : case study : class diesel locomotives (traction and rolling stock) ». Thesis, Peninsula Technikon, 2001. http://hdl.handle.net/20.500.11838/1019.

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Thesis (MTech (Business Administration))--Peninsula Technikon, 2001
Maintenance of locomotives is the main function of Bellville Locomotive Traction Depot in the Western Cape. Therefore, it is important to have a sound maintenance plan in place, to prevent a negative impact on the availability and reliability of locomotive supply for hauling power to train services. The purpose of the research is to determine the causes of the increased frequency of maintenance through a case study relating to 35-class locomotives. The abnormal increased frequency of wheel change and inter-bogie control repairs on 35-class diesel locomotives is investigated. A research survey was adopted, which included questionnaires and personal interviews based on the literature search. The target group is L&N section, which includes below-deck maintenance, overhaul and change out, repairs to locomotive bogies, frames, wheels, snubbers, inter-bogie control and traction motors. Sixteen people are responsible for all below-deck repairs and service of 52 locomotives. The results of the research will expose the shortcomings of the maintenance plan and propose solutions. This will be achieved by testing the effectiveness of the existing maintenance plan at Spoornet through the identification of the causes for the abnormal increase in wheel changes and inter-bogie control repairs on 35-class diesel locomotives. The outcome from this case study research will be to quantify the benefits arising from the effective application of a maintenance plan.

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Doyle, Leo F. « A guide for the selection and maintenance of computer peripherals ». Virtual Press, 1991. http://liblink.bsu.edu/uhtbin/catkey/834517.

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This thesis is a resource document for computer information that is not presently available as a single unit. It describes most of the commonly available computer peripherals and some not-so-common ones from the micro, mini, and mainframe computer worlds. Physical descriptions, methods of operation, trouble shooting, maintenance, and some schematics and future trends are covered. A few older devices having historical significance are also discussed.By knowing where the computer industry is currently and seeing where it has been hardware-wise, it should be possible to project the direction in which the computer industry is headed. People in the computer profession and people that use computers need to be educated about peripheral devices so that they may make informed decisions on which equipment to acquire and in planning for the future. This thesis should be a valuable aid in this process. The information presented should save time and money during the decision-making process and lead to more effective choices of equipment.
Department of Computer Science

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Qweleka, Sazile. « The factors that hinder the overall equipment effectiveness at Ford Struandale Engine Plant ». Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1163.

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This treatise investigates the underlying factors that are hindering the improvement of Overall Equipment Effectiveness at the Ford Struandale Engine Plant. In January of 2008 the Ford Motor Company announced plans to invest more than R1.5 billion to expand operations for the production of Ford's next-generation compact pickup truck and the PUMA diesel engine. Ford will use the investment to expand operations both in Silverton for the production of 75 000 units of a new bakkie and in Port Elizabeth for 220 000 units of its new-generation PUMA diesel engines (http://www.autoblog.com /2008/01/31/ford-to-invest-209m-in-south-africa-for-new-ranger-pickup/). Only five Ford plants globally will be producing the PUMA engine (Turkey, UK, Thailand, Argentina and South Africa – Ford Struandale Engine Plant). The Ford Struandale Engine Plant will be the only plant which will have the I4 assembly, I5 assembly and 3C (Crank, Cylinder Block, and Cylinder Head) machining and the expectations of operating in a lean environment is high. The management team at the Ford Struandale Engine Plant needs to understand what the underlying factors that are hindering the improvement of Overall Equipment Effectiveness of the plant or, in other words, they need to be informed of the total benefits of TPM. A literature review was conducted to determine what the theory reveals about Overall Equipment Effectiveness, the three factors of OEE (Availability, Performance Efficiency, and Quality), the influence of Six Big Losses on each of the factors and the role of Total Productive Maintenance in improving OEE by eliminating these Six Big Losses. A Ford literature study was conducted to reveal the current literature being applied at Ford. This was then followed by an empirical survey conducted within the Ford Struandale Engine Plant. In addition, a task team formed to analyse the current maintenance operating strategy. Finally, the findings from discussions with the task team, the empirical survey, Ford Struandale Engine Plant literature survey and a general literature survey were amalgamated to draw conclusions relating to the Ford Struandale Engine Plant. These conclusions indicate what the underlying factors are that are hindering the improvement of Overall Equipment Effectiveness of the Ford Struandale Engine Plant facilities and equipment. Then recommendations are made as to how the Ford Struandale Engine Plant can improve the Overall Equipment Effectiveness of its facilities and equipment.

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Collins, Fred C. « Evaluation of a repairable equipment population system and its logistics support subsystem ». Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10062009-020124/.

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Moore, Thomas P. « Optimal design, procurement and support of multiple repairable equipment and logistic systems ». Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/71158.

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A concept for the mathematical modeling of multiple repairable equipment and logistic systems (MREAL systems) is developed; These systems consist of multiple populations of repairable equipment, and their associated design, procurement, maintenance, and supply support. MREAL systems present management and design problems which parallel the·management and design of multiple, consumable item inventory systems. However, the MREAL system is more complex since it has a repair component. The MREAL system concept is described in a classification hierarchy which attempts to categorize the components of such systems. A specific mathematical model (MREAL1) is developed for a subset of these components. Included in MREAL1 are representations of the equipment reliability and maintainability design problem, the maintenance capacity problem, the retirement age problem, and the population size problem, for each of the multiple populations. MREAL1 models the steady state stochastic behavior of the equipment repair facilities using an approximation which is based upon the finite source, multiple server queuing system. System performance measures included in MREAL1 are: the expected MREAL total system life cycle cost (including a shortage cost penalty); the steady state expected number of shortages; the probability of catastrophic failure in each equipment population; and two budget based measures of effectiveness. Two optimization methods are described for a test problem developed for MREAL1. The first method computes values of the objective function and the constraints for a specified subset of the solution space. The best feasible solution found is recorded. This method can also examine all possible solutions, or can be used in a manual search. The second optimization method performs an exhaustive enumeration. of the combinatorial programming portion of MREAL1, which represents equipment design. For each enumerated design combination, an attempt is made to find the optimal solution to the remaining nonlinear discrete programming problem. A sequential unconstrained minimization technique is used which is based on an augmented Lagrangian penalty function adapted to the integer nature of MREAL1. The unconstrained minimization is performed by a combination of Rosenbrock's search technique, the steepest descent method, and Fibonacci line searches, adapted to the integer nature of the search. Since the model contains many discrete local minima, the sequential unconstrained minimization is repeated from different starting solutions, based upon a heuristic selection procedure. A gradient projection method provides the termination criteria for each unconstrained minimization.
Ph. D.

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Reasor, Roderick. « A decision support system for integrated design analysis of a repairable item and it's logistic support system ». Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07102007-142510/.

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Conrad, George R. « Development of course outlines for a maintenance technician training program ». CSUSB ScholarWorks, 1985. https://scholarworks.lib.csusb.edu/etd-project/415.

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Klopper, Marthinus Ferreira. « The life expectancy of heavy earthmoving equipment on a sand dune mine in a highly corrosive environment ». Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/80762.

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Thesis (MBA)--Stellenbosch University, 2004.
ENGLISH ABSTRACT: Richards Bay Minerals (RBM) went through a restructuring process in 2002. The effect that these changes had on the life expectancy of the heavy earthmoving equipment (HEME) at the company’s sand dune mining operation situated at Richard’s Bay on the north coast of KwaZulu-Natal, was unknown. This study explores these, and various other factors, that influence the life expectancy of the HEME in this highly corrosive environment. During the last number of years there has been no equipment replacement philosophy at RBM and this has resulted in the average age of HEME at the mine being extremely high. This study suggests that when restructuring is implemented in the wrong way, the process can have significant negative implications. The study determines how the behaviour of especially drivers and maintenance personnel (maintainers) impacts on the expected life of the HEME at RBM. The hidden cost element of driver and maintainer unhappiness, however, is not included as part of this study. In the first part of this study project, the writer focuses on what may have caused the unhappiness, and makes suggestions for further studies aimed at addressing this unhappiness and changing the behaviour of drivers and maintainers. These suggestions should be seen as guidelines, as measures that work in one company may not necessarily work in another. The second part of the study project deals with the replacement philosophy regarding HEME at RBM. The mine has various types of equipment, but the main focus of this research falls on the following: Caterpillar 966- 980 (payloaders), track type equipment Caterpillar D7R/H (dozers), Caterpillar 988- 992 (heavy duty payloaders) and Bell B25 articulated dumptrucks (dumptrucks) Four different replacement models are investigated and discussed in detail. The model that was best aligned with the Caterpillar proposed best replacement practice, as stipulated by the Caterpillar replacement expert, is identified. Finally, a replacement cycle for the different types of equipment is proposed.
AFRIKAANSE OPSOMMING: Richardsbaai Minerale (RBM) het in 2002 deur ‘n herstruktureringsprogram gegaan. Die uitwerking wat die gevolge daarvan op die swaar grondverskuiwingsvoertuie (SGV) gehad het was onbekend. Gedurende die laaste aantal jare was daar geen vervangingsbeleid by RBM nie, en dit het meegebring dat die gemiddelde ouderdom van die SGV op die myn buitengewoon hoog is. Dit is belangrik om te bepaal wat die invloed van menslike gedrag van veral die drywers en herstelpersoneel op die verwagte leeftyd van SGV is. Die versteekte koste wat verbind word met ongelukkige drywers en herstelpersoneel maak nie deel uit van hierdie studie nie. As herstrukturering op die verkeerde manier toegepas word kan dit ‘n negatiewe impak hê. In die studie sal daar aandag gegee word aan wat die negatiewe elemente is en wat is die moontlike oorsaak daarvan. Daar word ook sekere voorstelle gemaak vir toekomstige studies om die ongelukkigheid aan te spreek en ‘n gedragsverandering na vore te bring. Die voorstelle is slegs riglyne en, wat in een maatskappy werk sal nie noodwendig in ‘n ander een werk nie. Die tweede deel van die werkstuk fokus op vervangingsteorieë met betrekking tot die SGV op RBM. Die myn het verskeie tipes SGVs maar die fokus het geval op vier soorte SGV. Hulle is Caterpillar 966- Caterpillar 980 (gemiddelde laaiers), spoor tipe toerusting Caterpillar D7R/H (stootskrapers), Caterpillar 988- Caterpillar 992 (swaargewig mobiele laaiers) en Bell B25 geartikuleerde stortings trokke (stortings trokke). Vier verskillende modelle is ondersoek en deeglik bespreek. Die model met die beste uitslae wat die mas opgekom het ten opsigte van die Caterpillar se voorgestelde beste vervangings praktyk, soos aangedui deur die Caterpillar voertuig vervangings kenner, is ge-identifiseer. Laastens word die vervangingsiklus vir die verskillende tipes toerusting voorgestel.

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Weppenaar, De Ville. « Intelligent maintenance management in a reconfigurable manufacturing environment using multi-agent systems ». Thesis, Bloemfontein : Central University of Technology, Free State, 2010. http://hdl.handle.net/11462/136.

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Thesis (M. Tech.) -- Central University of Technology, Free State, 2010
Traditional corrective maintenance is both costly and ineffective. In some situations it is more cost effective to replace a device than to maintain it; however it is far more likely that the cost of the device far outweighs the cost of performing routine maintenance. These device related costs coupled with the profit loss due to reduced production levels, makes this reactive maintenance approach unacceptably inefficient in many situations. Blind predictive maintenance without considering the actual physical state of the hardware is an improvement, but is still far from ideal. Simply maintaining devices on a schedule without taking into account the operational hours and workload can be a costly mistake. The inefficiencies associated with these approaches have contributed to the development of proactive maintenance strategies. These approaches take the device health state into account. For this reason, proactive maintenance strategies are inherently more efficient compared to the aforementioned traditional approaches. Predicting the health degradation of devices allows for easier anticipation of the required maintenance resources and costs. Maintenance can also be scheduled to accommodate production needs. This work represents the design and simulation of an intelligent maintenance management system that incorporates device health prognosis with maintenance schedule generation. The simulation scenario provided prognostic data to be used to schedule devices for maintenance. A production rule engine was provided with a feasible starting schedule. This schedule was then improved and the process was determined by adhering to a set of criteria. Benchmarks were conducted to show the benefit of optimising the starting schedule and the results were presented as proof. Improving on existing maintenance approaches will result in several benefits for an organisation. Eliminating the need to address unexpected failures or perform maintenance prematurely will ensure that the relevant resources are available when they are required. This will in turn reduce the expenditure related to wasted maintenance resources without compromising the health of devices or systems in the organisation.

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Bester, Johannes Coen. « Kosteberekening en tariefvasstelling van konstruksiemasjiene en voertuie ». Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51811.

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Study project (MComm)--University of Stellenbosch, 2000.
ENGLISH ABSTRACT: The purpose of this assignment is to develop a method for rate making of construction machines and vehicles. An analysis of the fixed and variable cost of machines and vehicles are made together with the allocation of overhead costs. After anal ising the various cost components a model is developed for the determination of depreciation and finance charges by using the utilization of the relevant plant item. The figures obtained from this model are then used in an asset register. The information needed by the Receiver of Revenue is also included in this register for calculating the depreciation value at the end of the financial year. The maintenance and replacement of plant equipment are also discussed. Before the conclusion the necessity of keeping accurate records and the use of budgets for managing are looked at.
AFRIKAANSE OPSOMMING: Die doel van die werkstuk is om 'n raamwerk daar te stel wat gebruik kan word vir tariefvasstelling van konstruksiemasjiene en - voertuie. In Ontleding van die vaste en veranderlike koste van masjinerie en voertuie word gemaak, asook die hantering van oorhoofse koste in die onderneming. Nil die bespreking van die verskillende kostekomponente waaruit 'n tarief bestaan, word die klem geplaas op die berekening van waardevermindering. 'n Model vir waardeverminderingen finansieringskostebepaling aan die hand van die benutting van toerusting word ontwikkel. Die inligting sodoende verkry word saamgevat in 'n bateregister tesame met die inligting noodsaaklik vir die Ontvanger van Inkomste om waardeverminderingafskrywings te maak aan die einde van elke finansiele jaar. Die onderhoud en vervanging van toerusting word ook bespreek. Ter afsluiting word rekordhouding en die opstel van begrotings bespreek en die nut daarvan vir bestuur uitgewys.

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Saxena, Abhinav. « Knowledge-Based Architecture for Integrated Condition Based Maintenance of Engineering Systems ». Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16125.

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A paradigm shift is emerging in system reliability and maintainability. The military and industrial sectors are moving away from the traditional breakdown and scheduled maintenance to adopt concepts referred to as Condition Based Maintenance (CBM) and Prognostic Health Management (PHM). In addition to signal processing and subsequent diagnostic and prognostic algorithms these new technologies involve storage of large volumes of both quantitative and qualitative information to carry out maintenance tasks effectively. This not only requires research and development in advanced technologies but also the means to store, organize and access this knowledge in a timely and efficient fashion. Knowledge-based expert systems have been shown to possess capabilities to manage vast amounts of knowledge, but an intelligent systems approach calls for attributes like learning and adaptation in building autonomous decision support systems. This research presents an integrated knowledge-based approach to diagnostic reasoning for CBM of engineering systems. A two level diagnosis scheme has been conceptualized in which first a fault is hypothesized using the observational symptoms from the system and then a more specific diagnostic test is carried out using only the relevant sensor measurements to confirm the hypothesis. Utilizing the qualitative (textual) information obtained from these systems in combination with quantitative (sensory) information reduces the computational burden by carrying out a more informed testing. An Industrial Language Processing (ILP) technique has been developed for processing textual information from industrial systems. Compared to other automated methods that are computationally expensive, this technique manipulates standardized language messages by taking advantage of their semi-structured nature and domain limited vocabulary in a tractable manner. A Dynamic Case-based reasoning (DCBR) framework provides a hybrid platform for diagnostic reasoning and an integration mechanism for the operational infrastructure of an autonomous Decision Support System (DSS) for CBM. This integration involves data gathering, information extraction procedures, and real-time reasoning frameworks to facilitate the strategies and maintenance of critical systems. As a step further towards autonomy, DCBR builds on a self-evolving knowledgebase that learns from its performance feedback and reorganizes itself to deal with non-stationary environments. A unique Human-in-the-Loop Learning (HITLL) approach has been adopted to incorporate human feedback in the traditional Reinforcement Learning (RL) algorithm.

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Myburgh, W. D. « Development of a tool to test computer protocols ». Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53363.

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Thesis (MSc) -- Stellenbosch University, 2003.
ENGLISH ABSTRACT: Software testing tools simplify and automate the menial work associated with testing. Moreover, for complex concurrent software such as computer protocols, testing tools allow testing on an abstract level that is independent of specific implementations. Standard conformance testing methodologies and a number of testing tools are commercially available, but detailed descriptions of the implementation of such testing tools are not widely available. This thesis investigates the development of a tool for automated protocol testing in the ETH Oberon development environment. The need to develop a protocol testing tool that automates the execution of specified test cases was identified in collaboration with a local company that develops protocols in the programming language Oberon. Oberon is a strongly typed secure language that supports modularisation and promotes a readable programming style. The required tool should translate specified test cases into executable test code supported by a runtime environment. A test case consists of a sequence of input actions to which the software under test is expected to respond by executing observable output actions. A number of issues are considered of which the first is concerned with the representation of test case specifications. For this, a notation was used that is basically a subset of the test specification language TTCN-3 as standardised by the European Telecommunications Standards Institute. The second issue is the format of executable test cases and a suitable runtime environment. A translator was developed that generates executable Oberon code from specified test cases. The compiled test code is supported by a runtime library, which is part of the tool. Due to the concurrent nature of a protocol environment, concurrent processes in the runtime environment are identified. Since ETH Oberon supports multitasking in a limited sense, test cases are executed as cooperating background tasks. The third issue is concerned with the interaction between an executing test case and a system under test. It is addressed by an implementation dependent interface that maps specified test interactions onto real interactions as required by the test context in which an implementation under test operates. A supporting protocol to access the service boundary of an implementation under test remotely and underlying protocol service providers are part of a test context. The ETH Oberon system provides a platform that simplifies the implementation of protocol test systems, due to its size and simple task mechanism. Operating system functionality considered as essential is pointed out in general terms since other systems could be used to support such testing tools. In conclusion, directions for future work are proposed.
AFRIKAANSE OPSOMMING: Toetsstelsels vir programmatuur vereenvoudig en outomatiseer die slaafse werk wat met toetsing assosieer word. 'n Toetsstelsel laat verder toe dat komplekse gelyklopende programmatuur, soos rekenaarprotokolle, op 'n abstrakte vlak getoets word, wat onafhanklik van spesifieke implementasies is. Daar bestaan standaard metodes vir konformeringstoetsing en 'n aantal toetsstelsels is kommersiëel beskikbaar. Uitvoerige beskrywings van die implementering van sulke stelsels is egter nie algemeen beskikbaar nie. Hierdie tesis ondersoek die ontwikkeling van 'n stelsel vir outomatiese toetsing van protokolle in die ontwikkelingsomgewing van ETH Oberon. Die behoefte om 'n protokoltoetsstelsel te ontwikkel, wat die uitvoering van gespesifiseerde toetsgevalle outomatiseer, is geïdentifiseer in oorleg met 'n plaaslike maatskappy wat protokolle ontwikkel in die Oberon programmeertaal. Oberon is 'n sterkgetipeerde taal wat modularisering ondersteun en a leesbare programmeerstyl bevorder. Die toestsstelsel moet gespesifiseerde toetsgevalle vertaal na uitvoerbare toetskode wat ondersteun word deur 'n looptydomgewing. 'n Toetsgeval bestaan uit 'n reeks van toevoeraksies waarop verwag word dat die programmatuur wat getoets word, sal reageer deur die uitvoering van afvoeraksies wat waargeneem kan word. 'n Aantal kwessies word aangeraak, waarvan die eerste te make het met die voorstelling van die spesifikasie van toetsgevalle. Hiervoor is 'n notasie gebruik wat in wese 'n subversameling van die toetsspesifikasietaal TTCN-3 is. TTCN-3 is gestandardiseer deur die European Telecommunications Standards Institute. Die tweede kwessie is die formaat van uitvoerbare toetsgevalle en 'n geskikte looptydomgewing. 'n Vertaler is ontwikkel wat uitvoerbare Oberon-kode genereer vanaf gespesifiseerde toetsgevalle. Die vertaalde toetskode word ondersteun deur 'n biblioteek van looptydfunksies, wat deel van die stelsel is. As gevolg van die eienskap dat 'n protokolomgewing uit gelyklopende prosesse bestaan, word daar verskillende tipes van gelyklopende prosesse in 'n protokoltoetsstelsel geïdentifiseer. Aangesien ETH Oberon 'n beperkte multitaakstelsel is, word toetsgevalle vertaal na eindige outomate wat uitgevoer word as samewerkende agtergrondtake. Die derde kwessie het te make met die interaksie tussen 'n toetsgeval wat uitgevoer word en die stelsel wat getoets word. Dit word aangespreek deur 'n koppelvlak wat gespesifiseerde interaksies afbeeld op werklike interaksies soos vereis deur die konteks waarin 'n implementasie onderworpe aan toetsing uitvoer. 'n Ondersteunende protokolom die dienskoppelvlak van die implementasie oor 'n afstand te bereik en ander onderliggende protokoldienste is deel van 'n toetskonteks. Die ETH Oberon-stelsel help in die vereenvoudiging van die implementasie van protokol toetsstelsels, as gevolg van die stelsel se grootte en die eenvoudige taakhanteerder . Die essensiële funksionaliteit van bedryfsstelsels word uitgelig in algemene terme omdat ander stelsels gebruik kan word om toetsstelsels te ondersteun. Ten slotte word voorstelle vir opvolgwerk gemaak.

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Brinkle, Ray Franklin. « Automotive electrical/electronics unit plans for Fontana High School ». CSUSB ScholarWorks, 2001. https://scholarworks.lib.csusb.edu/etd-project/1880.

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Labiyi, Femi Gbenga. « The Implementation of Total Productive Maintenance (TPM) InManufacturing Company : A Case Study of XYZ Plastics Manufacturing Company in Nigerian ». Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23298.

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The purpose of this thesis is to implement Total Productive Maintenance (TPM) in Nigeria Plastics Manufacturing Company. Manufacturing companies round the world pay huge amount of money for purchasing new equipments to boost their production however nothing or little is done to achieve or obtain full output from the machine for which it is intended to do. Small losses in time or deviations from planned or calculated capability are taken as usual machine performance. But currently as a result of improved capability levels and demand of quality product at lower prices, purchasing latest machine/equipment is not a way out unless it is completely used. Total Productive Maintenance (TPM) is a method that involve everybody totally, from high management to all workers to implement a complete maintenance program for all machine/equipment during its life. This method ends up in most effectiveness of tools, equipment, virtuously improved workers, tidy up working area, neat and clean working environment. A structure is going to be developed with the potential of evaluating the impact of implementing total productive maintenance within. By evaluating the result or outcome of Total Productive Maintenance (TPM), manufacturing companies can create sensible/smart decisions to improve the potency and standard of the machine, equipment and also the product on XYZ Plastics Manufacturing Company in Nigerian.

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Chaloupková, Veronika. « Návrhy na zlepšení hospodaření s dlouhodobým hmotným majetkem ». Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-319433.

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This Master thesis deals with the management of long-term tangible property in the company Česko-slezská výrobní, a. s., which is engaged in manufacturing of portable and sanitary cabins. The thesis is divided into three parts. The first part describes the theoretical background, which forms the theoretical base of the whole thesis. The second part is focused on analysis of the current situation of long-term tangible property in the company and property maintenance. The result of the analysis is identification of weaknesses and opportunities for development. In the last part are proposed solution including economic evaluation and time-consuming.

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Osman, Mohamud Maria, et Ubilla Fernanda Sanchez. « Ultraljudsutbildningar för medicintekniska ingenjörer : Behovsinventering, inköpsprocedurer och effekter ». Thesis, KTH, Medicinteknik och hälsosystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298194.

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Denna studie syftar till att undersöka hur ultraljudsutbildningar för ingenjörer köps in, vad de innehåller, hur de genomförs, utvärderas och vilka resultatutbildningarna leder till. Totalt intervjuades sex sjukhus runt om i Sverige där elva medicintekniska ingenjörer och fyra verksamhetschefer deltog. En kvalitativ metod användes i studien i form av semistrukturerade intervjuer som grund för att analysera frågeställningarna. Resultatet visade att utbildningar köps in i upphandling av nya ultraljudsmaskiner och genomförs under garantiåren. Utbildningarna hålls av leverantörerna och de brukar vara i två dagar. Effekterna av utbildningarna varierar och beror på vilket serviceavtal som sjukhusen har. Det saknas en formell modell för utvärdering och uppföljning, trots det faktum att det i årliga möten diskuteras hur utbildningarna har gått och vilka kompetenser som behövs. Resultatet från studien kan främst användas i syfte att skapa bättre utbildningar, underlätta kommunikationen mellan sjukhus och leverantör om vad kursen innebär, samt vad ingenjörerna föredrar för innehåll i kurser för att kunna utvecklas inom ultraljud.
This study aims to investigate how ultrasound training for engineers is purchased, including how it is carried out and evaluated, what the different courses contain and what result the courses lead to. Six hospitals around Sweden were interviewed, where eleven medical engineers and four business managers participated. A qualitative method was used in the study with semi-structured interviews as a basis for analysing the issues. The results showed that the training courses are purchased in the procurement of new ultrasound machines and are carried out during the warranty years. The suppliers hold the training courses, which are usually held for two days. The effects of training vary and depend on the service agreement that the hospitals have. There is no formal model for evaluation and follow-up, even though annual meetings discuss how the training has gone and what skills are needed. The results can mainly be used to create better training and improve communication between hospital and supplier about what the course entails and what the engineers prefer for the content of courses to develop in the area.

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Skálová, Hana. « Návrhy na zlepšení hospodaření s dlouhodobým hmotným majetkem ». Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2012. http://www.nusl.cz/ntk/nusl-223653.

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This thesis is focused on analysis of production facilities utilization and maintenance in the company RAMET C.H.M. a.s. located in Kunovice. In this thesis, there is performed the analysis of present property condition, machinery and equipment used within radar antenna production. Within property maintenance, there are introduced planned and unplanned processes of servicing activities and machine and equipment repair. In a part of proposal for solution, there are recommended processes for keeping up production capabilities based on extensive analysis of size property influence on production volume. The method for reliability estimation of production chain is described for the antenna production, related to limiting production capability and costs to maintain service availability of production facilities.

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Dube, Khanyisa Phumza. « Total repair cost limit replacement policies : analyses and comparisons ». Thesis, 2016. http://hdl.handle.net/10539/21041.

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A Research Report submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science. Johannesburg, 2016
Maintenance of technical systems aims at retaining their reliability and availability, restoring their capability of continuing their operation in case they have failed. A number of reliability and maintenance policies that play a significant role in reducing system failures and in making cost-effective decisions on whether to repair or replace a system will be examined in great detail. This research report places greater emphasis on the total repair cost (TRC) limit policy and compares it with other polices like the economic lifetime (EL) policy. The maintenance cost rate will be used to obtain the optimal parameters. When a system fails, it is replaced with an identical unused one if the total repair cost goes beyond a pre-determined repair cost limit by a preventive replacement if in the time period (0, v) no failure forces a replacement of the system. Else, a repair is carried out.
M T 2016

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Olivier, Jeramia Jesaja. « A model for the successful implementation of repair and maintenance contracts in the opencast mining industry ». Thesis, 2012. http://hdl.handle.net/10210/5658.

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M.Phil.
In the modern world maintenance organisations are exposed to rapid changes in equipment complexity and the maintenance thereof. Maintenance people have to adopt completely new ways of thinking and managing. If organisations and their management do not adapt to these changes and challenges they are destined to oblivion. Moubray (1991:1) states that: "Managers everywhere are looking for a new approach in maintenance. They want to avoid the false starts and dead ends which always accompany major upheavals. Instead they seek a strategic framework which synthesizes the new developments into a coherent pattern, so that they can evaluate them sensibly and apply those likely to be of most value to them and their companies" One of the viable alternative business strategies and maintenance approaches in dealing with equipment complexity and hence the management thereof, is by means of maintenance outsourcing and contract setting. If done correctly it reduces the risk of organisations and increases flexibility. During outsourcing initiatives organisations will look for benefits such as improvement of its profit margins by means of inventory reductions, improved reliability, maintenance efficiency and expert skills maintaining their assets. Coetzee (1997:24) explain that the task of the maintenance function is "to support the production process with adequate levels of availability, reliability and operability at an acceptable cost". The same principles apply in adherence to the maintenance contracts where the Original Equipment Manufacturer (OEM) or contractor also needs to support the customer with the adequate levels of availability, reliability and operability at defined costs. This can only be achieved by quality maintenance; "the right level of maintenance performed at the right time to the right equipment by workmen able and willing to deliver quality workmanship and using correct task specifications" (Coetzee, 2000a). The method used in maintenance outsourcing negotiation and binding agreements between the organisation and the contractor is a Repair and Olivier-2008 Department of Mechanical and Manufacturing Engineering - UJ Maintenance Contract; commonly known as R+M or MARC contracts. Essentially a Repair and Maintenance contract is the outsourcing of a long term Service Level Agreement (SLA) or maintenance project, normally to the OEM, or its authorised service organisation. "A maintenance and repair contract is a contractual agreement between the OEM (original equipment manufacturer), or contractor, and the equipment owner or user, where the OEM or contractor carries out all maintenance and repair activities at a guaranteed rate per hour" (Lugtigheid, et al. 2007). When organisations adapt outsourcing as a business strategy, it creates a framework of uncertainty and risk to Original Equipment Manufactures and/or maintenance contractors who has to perform the maintenance services. The focus of manufacturing and selling is thus disrupted by the challenge of the unknown playgrounds of competitiveness

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Pretorius, Nico. « The optimal replacement life of opencast mining haultrucks utilizing key performance indicators ». Thesis, 2012. http://hdl.handle.net/10210/6701.

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M.Phil.
In an ever - increasing competitive business world it is essential to optimise the replacement of expensive mining equipment. The decisions regarding the replacement of assets used in a coal mine are usually based on life cycle costing models. Financial methods such as Net Present Value, Internal Rate of Return or Payback are applied to determine the feasibility of replacement of the asset. Whereas these methods and other models such as life cycle costing, challenger / defender and the Non-Homogeneous Poisson Process models can be applied in most cases, it is deemed to be insufficient as the sole decision making tool for the replacement of mining equipment. The development of another tool to assist in the decision making process is required for specific use by the engineer to be used in conjunction with the traditional financial models. Key performance indicators are used extensively in the mining industry to manage the performance of equipment and are deemed to be essential components in achieving the organisation's objectives. There are certain limitations when using only the traditional financial life cycle costing methods when viewed from the engineer's perspective, since they do not directly incorporate the level of the maintenance function and the performance effectiveness of the asset. The engineer usually requires more insight into the performance of the asset to assess the feasibility of replacement, hence the need for an additional tool that incorporates these key performance indicators. In most cases there are relationships between the various key performance indicators themselves as well as between them and the operating and maintenance cost of the asset. The key performance indicators used are availability, reliability (mean time to failure), maintainability (mean time to repair) and the operability (tons per direct operating hour). There are certain factors that may lead to the excessive operating and maintenance cost of an asset, especially if there is no investigation into the reasons for the excessive cost. Examples are sub-standard maintenance practices and an insufficient level of service from suppliers. Both are issues that can be resolved with a consequent decrease in the cost of ownership of the asset. Cost as the only indicator of the feasibility of replacement may therefore not be a true reflection of the real status of the performance of the asset. Weighting factors are used to allocate values to the key performance indicators in terms of their contribution towards achieving the organisational objectives. The equipment effectiveness is derived from these values to give an indication of how well the equipment is performing against predetermined benchmarks. This dissertation attempts tb find a solution to the problem through the use of the key performance indicators in addition to the existing models that focus on the financial aspect in order to provide a more accurate assessment of the replacement requirement of an asset in an opencast coal mine.

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Carelse, Henry Alfred. « A model for managing maintenance in the prepared foods industry in the areas of frozen vegetables and prepared frozen meals ». Thesis, 1993. http://hdl.handle.net/10539/22080.

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A project report submitted to the faculty of Engineering, University of the Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the degree of master of Science in Engineering. Heidelberg Transvaal, 1993.
The obiective of this research is to propose a model by which maintene may be managed in the prepared foods industry. Various companies in this industry have implemented modules of a maintenance administration system. Nowhere, for this industry, does a structured programme which will provide tha maintenance manager with the elements of an administration system, their sequence of implementation and their interrelationships exist. [Abbreviated Abstract. Open document to view full version]
AC2017

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Khalaf, Abdelbaset Abdelrahem. « Evidence-based mathematical maintenance model for medical equipment ». 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000597.

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D. Tech. Electrical Engineering.
Aims to develop a mathematical maintenance model for medical equipment for the purpose of analysing maintenance strategies to optimise maintenance of medical equipment.

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Chang, Wen-Liang, et 張文亮. « Optimal Maintenance Policies for Leased Equipment under Different Threshold Values for Repair ». Thesis, 2007. http://ndltd.ncl.edu.tw/handle/agb3ka.

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博士
國立臺灣科技大學
工業管理系
95
For multi-function products, manufacturers may need different types of machine equipment to produce them. However, the maintenance of machine equipment usually requires special professional technicians, which is not economical for manufacturers to own a professional maintenance group. For cost reduction, manufacturers tend to lease machine equipment instead of buying them. Therefore, the lease companies have been developed. For the failure-rate/age feature of the leased equipment/goods, the lease company and manufacturers may sing a lease contract which includes the leased period, preventive maintenance (PM) time, tolerance time of repair and penalty cost. This thesis proposes that the lease company performs PM actions when the failure rate/age of equipment reaches a threshold value in order to reduce the lease company's maintenance cost and the manufacturer's production cost caused by equipment failures. The age-reduction and failure-rate-reduction methods of PM are adopted to prevent equipment failure and maintain the operational state of the equipment in order to produce the products with good quality. For the failure rate and age characteristic of the leased equipment and the length of lease period, this thesis proposes four major topics to investigate the optimal PM policy for the leased equipment within the lease period: (i) single-phase model under age-reduction method (ARM), (ii) two-phase model under ARM, (iii) single-phase model under failure-rate-reduction method (FRRM) and (iv) two-phase model under FRRM.

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Snyman, T. « Mechanical condition monitoring of impulsively loaded equipment using neural networks ». Thesis, 2014. http://hdl.handle.net/10210/9203.

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Nkholise, Wetsi. « Total productive maintenance implementation at DCD Wind Towers ». 2015. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001908.

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M. Tech. Business Administration
The research reviews how the implementation of total productive maintenance (TPM), as a maintenance strategy, can be adopted at DCD Wind Towers (Pty) Ltd., a wind tower manufacturing company in South Africa. It also focuses on maintenance management programmes, identifies obstacles, barriers and challenges to the implementation of maintenance management programmes.

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Somboonwiwat, Tuanjai. « A methodology to solve large-scale group fleet replacement problems ». Thesis, 2001. http://hdl.handle.net/1957/32541.

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This research addresses the large-scale group fleet replacement problem with multiple vehicle types of multiple units, under budget and demand constraints. Past research in group fleet replacement is limited and has focused on one vehicle type, with multiples units and constraints. Many studies in fleet replacement have also dealt with single replacement, with single units, and with no constraints. The objective of this research is to find the methodology to solve the general large-scale group fleet replacement problem. A multi-phase methodology based on the grouping concept is presented and is integrated with optimization techniques. The vehicles are grouped according to various technology parameters. A two-level hierarchical replacement process, focusing on inter-group, and intra-group analysis, is developed and the resulting models are solved using integer programming. Finally, a case study using the Oregon Department of Transportation records is examined. The replacement model presented can incorporate complex variations in the large-scale group fleet replacement problem. It is flexible and can be used in wide variety of replacement problems. Used appropriately, the results from this methodology can result in reduced fleet replacement costs and operation costs.
Graduation date: 2001

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Chipoyera, Honest Walter. « Inspection and replacement models for reliability and maintenance : filling in gaps ». Thesis, 2017. http://hdl.handle.net/10539/23607.

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A thesis submitted in fulﬁllment of the requirements for the Degree of Doctor of Philosophy, School of Statistics and Actuarial Science, Faculty of Science University of Witwatersrand, Johannesburg. February 2017.
The work done in this thesis on ﬁnite planning horizon inspection models has demonstrated that with the advent of powerful computers these days it is possible to easily ﬁnd an optimal inspection schedule when the lifetime distribution is known. For the case of system time to failure following a uniform distribution, a result for the maximum number of inspections for the ﬁnite planning models has been derived. If the time to failure follows an exponential distribution, it has been noted that periodically carrying out inspections may not result in maximization of expected proﬁt. For the Weibull distributions family (of which the exponential distribution is a special case), evenly spreading the inspections over a given ﬁnite planning horizon may not lead to any serious prejudice in proﬁt. The case of inspection models where inspections are of non-negligible duration has also been explored. The conditions necessary for inspections that are evenly spread over the entire planning horizon to be near-optimal when system time to failure either follows a uniform distribution or exponential distribution have been explored. Finite and inﬁnite planning horizon models where inspections are imperfect have been researched on. Interesting observations on the impact of Type I and Type II errors in inspection have been made. These observations are listed on page 174. A clear and easy to implement road map on how to get an optimal inspection permutation in problems ﬁrst discussed by Zuckerman (1989) and later reviewed by Qiu (1991) for both the undiscounted and discounted cases has been given. The only challenge envisaged when a system has a large number of components is that of computer memory requirements - which nowadays is fast being overcome. In particular, it has been clearly demonstrated that the impact of repair times and per unit of time repair costs on the optimal inspection permutation cannot be ignored. The ideas and procedures of determining optimal inspection permutations which have been developed in this thesis will no doubt lead to huge cost savings especially for systems where the cost of inspecting components is huge.
XL2018

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Van, Niekerk Johannes Albertus. « Ondersoek na instandhoudingsinligtingstelsels in 'n petrochemiese bedryf ». Thesis, 2014. http://hdl.handle.net/10210/9515.

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M.Ing. (Mechanical Engineering)
Considering the high cost of maintenance, effective maintenance management have the potential to contribute to the profit of a petrochemical business. The complexity of the maintenance domain in the petrochemical business demands the use of information systems for the management of maintenance. The availability of correct, easily interpretable information about maintenance can therefore contribute to the profit of a petrochemical business. Management decisions are based on available information. The quality (accuracy and timeliness) of the information create more room for creative decisions in the maintenance department. A computerized information management system is a tool employed in the optimization of maintenance cost and a requirement for world class maintenance. This system depends on information of a high quality. It should be kept in mind that this systems is an aid to maintenance management and would never be able to replace the maintenance manager. The role played by high quality information in the success of a computerized maintenance management system point towards the importance of the personnel that maintain the system and those that provide input to the system. These personnel need to be highlytrained and should have the most recent technology available. Continuing development of the computerized maintenance management system within a company is necessary for the system to succeed.

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Tomo, Zonwabele Zweli Simon. « Improving the reliability of a chemical process plant ». Thesis, 2012. http://hdl.handle.net/10210/4887.

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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.

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Joubert, Andrè. « Plant systems integration using the SAMI model to achieve asset effectiveness in modern plants ». Thesis, 2008. http://hdl.handle.net/10352/96.

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Thesis (D. Tech. (Electrical Engineering, Dept. of Process Control and Computer Systems))--Vaal University of Technology.
In recent years, industrial plant maintenance has changed dramatically. These changes are due to a considerable increase in the number and variety of physical plant assets, increased design complexity, new maintenance techniques and changing perspectives regarding on how to perform maintenance effectively. Managers at modern process plants are becoming increasingly aware of the extent to which equipment failure affects safety and the environment. Process plant personnel are limited in their ability to accurately and consistently evaluate the health of plant assets. Due to poor record keeping, maintenance staff often has little defence against aging equipment and asset failures. As a result companies have undertaken to implement planned equipment maintenance schedules and install new technology to allow for efficient tracking and analysing of equipment health across the board. The introduction of an integrated asset management solution is presented in this thesis. The integrated asset management solution will assist maintenance staff to cost-effectively predict the probability of asset failure prior to the occurrence of any actual plant incidents. The integrated solution documented in this thesis will be implemented at the Sasol Solvents site to enhance plant availability, maximum up time for all plant assets and plant safety. Strategic Asset Management Inc. (SAMI) uses the Operational Reliability Maturity Continuum model to improve profitability, efficiency and equipment reliability. The SAMI empirical model employs various stages to address improved performance and asset management and was used as a guideline to develop an integrated solution to optimise plant performance and profits. The integrated asset management solution, documented in this thesis, was developed with the intended function of bringing information from diverse plant based systems and field equipment to the maintenance personnel in an understandable interface so that the information can be used to improve the reliability and availability of all plant assets.

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Shiue, Gwo-huei, et 薛國輝. « A Study on the Relationship of Strategic of Flexible Human Resources Management and Firm Performance for State-run Enterprise -------- A Case Study of Department of Power Equipment Repair and Maintenance of Taiwan power Company ». Thesis, 2007. http://ndltd.ncl.edu.tw/handle/89108231585037368328.

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碩士
義守大學
管理研究所碩士班
95
Under the impact of liberalization and privatization of power industry, Taiwan Power Company (Taipower) is losing its competitive edge as a state monopoly. A great challenge facing Taipower is how to adopt to the fast changing environment by adjusting its manpower structure. A more flexible human resource strategy will then be essential to taipower for enhancing its competitiveness and diversification. In response to the shortage of energy, skyrocketing fuel price, regulation of power price and deregulation of power industry, most of the power plants in the world started to find out how to improve operating performance and to reduce the operating cost. As for Taipower, except for some new generator sets, most or its generating equipment is outdated, resulting in high maintenance expenses and personnel cost. Under the pressure for surviving in the competitive market, Taipower’s maintenance department has to resort to some strategies in order to improve its working efficiency and be more competitive. The characteristics of power maintenance industry include: capital, technique and labor intensive, having learning curve, economy of scale, customer satisfaction and having seasonal factor etc. Therefore, Stategic Human Resource Management (SHRM) will be an important topic for the Department of Power Equipment Repair and Maintenance of Taipower if it is to become the bench-marking company in the competitive environment of maintenance industry. The organization should treat human resource management as a strategic partner and adjust its human resource management strategies in response to the different environmental and organizational needs. Then, the organization should fine out the best human resource management activity to improve its performance. This thesis is a case study of the Department of Power Equipment Repair and Maintenance of Taipower. By collecting internal information (including business data, management document and in-depth interviews) as well as literature review, the study aims to identify a set of flexible human resource management strategies to improve organizational performance. The findings of the study include: 1.Flexible human resources management strategies have positive effects on organizational performance. 2.Flexible human resources management strategies can promote the maintenance technique of the organization. 3.Flexible human resources management strategies have positive effects on customer satisfaction.

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Тушов, П. А., et P. A. Tushov. « Совершенствование риск-ориентированного подхода к управлению энергоремонтами на примере ОАО «УРАЛТУРБО» : магистерская диссертация ». Master's thesis, 2019. http://hdl.handle.net/10995/77649.

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Энергоремонтный бизнес занимает важное место в энергетическом секторе России. Без его успешного функционирования энергокомпании не смогут эффективно осуществлять свою операционную деятельность. Тем не менее большинство энергоремонтных компаний не могут подстроиться под быстроменяющиеся условия внешней среды: актуальным трендом данного бизнеса является активное внедрение системы риск-менеджмента на предприятиях. Цель работы – совершенствование риск-ориентированного подхода к управлению энергоремонтами. Научная новизна заключается в разработке рекомендаций по управлению рисками на энергоремонтных предприятиях. Они направлены на снижение потерь от воздействий факторов внешней среды и повышение эффективности деятельности бизнеса. Практическая значимость состоит во внедрении нового для сектора инструмента стресс-тестирования в процессе управления рисками. Это позволит повысить эффективность операционной деятельности энергоремонтных предприятий: сценарно выявить чрезвычайные ситуации, которые приведут к критическим последствиям для компаний; оценить способность организации противостоять таким рискам; составить план мероприятий по их нейтрализации.
Energy repair business occupies an important place in the Russian energy sector. Without its successful operation, energy companies will not be able to effectively carry out their operations. However, the majority of the energy repair companies cannot adapt to the rapidly changing conditions of the external environment: the current trend of this business is the active implementation of the risk management system at enterprises. The aim is to improve the risk- oriented approach to energy repair management. The scientific novelty is to develop recommendations for risk management at energy repair enterprises. They are aimed at reducing losses from external factors and improving the efficiency of business. The practical significance is to introduce a new sector tool for the stress testing in the process of risk management. This will improve the efficiency of the operating activities of energy repair enterprises: scenario to identify emergencies that will lead to critical consequences for companies; assess the ability of the organization to withstand such risks; make a plan of measures to neutralize them.

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Thèses sur le sujet « Equipment and supplies - Maintenance and repair »

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