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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.
1

Reserch on TPM Program Practice- a case study of SYSCO

Lin, I-Hui 29 July 2003 (has links)
At the time of the globalization trend, the rising of Mainland China, and the protection on customs duty being loose after Taiwan joined WTO, the enterprises in Taiwan are faced with the stricter and stricter economic surroundings. Under so strict economic surroundings, to keep surviving, the enterprises must do well at the same time on the three areas including internal improvement, innovation and expansion. This study is taking Sheng Yu Steel Co., Ltd. (SYSCO) for example, reserch how SYSCO to introduce TPM programs on the basis of TQM, analyzing how to continue making internal improvement, promote overall equipment efficiency, and strengthen the company¡¦s competition advantage, by the way of mainly improving the production equipment. TQM activities had been successfully developed in SYSCO for years. Before TPM programs were initiated into SYSCO in the second half year of 2000, overall equipment efficiency in the whole company had reached 80.72%. Comparing with the major competitor¡¦s 67% before initiating TPM programs, 57.6% for Chunghwa Picture Tubes, Ltd., 65.6% for Taiwan YAMAHA Motor Corp. who were all awarded TPM Excellent Award, SYSCO faced more difficulties and it¡¦s not easy trying to greatly promote the overall equipment efficiency through TPM programs. However up to 2002, the overall equipment efficiency in the company had reached 86.29%, which is due to the concrete and available schemes and procedure of TPM programs, and the ¡§continuous improvement¡¨ of the corporate culture implemented by all staff. TPM programs were smoothly developed in SYSCO and fully supported by the top level, but, frankly speaking, during the TPM programs developing there were still some difficulties happened, such as passive resistance from few superiors and basic staff, and subcommittee organizing taking too long time, etc. As to the above problems, SYSCO had taken the solutions and produced the good effect.
2

Visualisering av produktionseffektivitet : Utveckling av ett verktyg för övervakningav avbrott och presentation av TAK

Bemler, Daniel January 2011 (has links)
Many companies do not register all the stops that occur in a production plant, it often takes longer to report than to fix the problem. If no problems are registered, you cannot trace where the problems arise. This master thesis was performed at AcobiaFLUX and they have noticed an increased demand from their customers to trace problems raised in their processes. The aim of the thesis was to find out how a tool to monitor a process best could be developed. Then the most essential from the theoretical base was developed into a useful tool for operators. For the operators to know if the process utilizes the full capacity of a process, the tool presents a measure of the Overall Equipment Efficiency, OEE. OEE is calculated by  ultiplying availability, performance and quality. Availability indicates how much time the  quipment is used for production. Performance indicates how efficient production is in terms of production speed. Quality indicates how many products that have been approved. In order for a tool that monitors processes and present production efficiency to be helpful it must be easy and intuitive for the user. To make an easy and intuitive tool for operators some Human-Computer-Interaction guidelines where used. The tool is not the primary  orkspace for an operator and therefore the use of the tool need to be minimized so it will not steal the operator’s time. To become a tool for tracing problems in processes, all operators need to participate and use the tool properly, otherwise you cannot compare if the production efficiency has been improved. / Många företag registrerar inte alla stopp som inträffar i en produktionsanläggning, det tar ofta längre tid att rapportera felet än att åtgärda det. Om inte problem registreras går det inte att spåra var problemen uppstår. Detta examensarbete är utfört hos AcobiaFLUX och de har märkt ett ökat behov från deras kunder att kunna spåra problem som uppkommit i processer. Målet med examensarbetet var att ta reda på hur ett verktyg för att övervaka en process bäst tas fram. När sedan det  eoretiska underlaget tagits fram skulle det som anses vara det nödvändigaste förverkligas till ett användbart verktyg för operatörer. För att operatörerna ska veta om processen utnyttjar hela kapaciteten i en process presenterar verktyget ett mått på produktionseffektiviteten, TAK. TAK beräknas som multiplikation mellan Tillgänglighet, Anläggningsutbyte och Kvalitetsutbyte. Där tillgängligheten anger hur stor del av tiden som en utrustning utnyttjas för produktion, anläggningsutbytet anger hur effektiv produktionen är i avseende på produktionshastighet och kvalitetsutbytet anger hur stor del av produktionen som är godkänd. Ett verktyg som övervakar processer och presenterar produktionseffektivitet ska vara ett hjälpmedel. Därför måste det vara enkelt och intuitivt för användaren. Verktyget är inte den primära arbetsytan för en operatör och därför måste användandet av den minimeras för att inte stjäla operatörens tid. För att operatören ska snabbt få en uppfattning om läget i  roduktionen görs en visualisering av numeriska värden, då det går snabbare att läsa av färgkoder än numeriska värden. Grunden för att verktyget ska bli ett hjälpmedel för att spåra problem i processer måste alla operatörer vara delaktiga och använda verktyget på rätt sätt annars går det inte att jämföra om produktionseffektiviteten har förbättrats.
3

Lean study on the maintenance division at Sandvik Coromant : Resource utilization of work procedures

Sundin, Fredric, Svensson, Victor January 2014 (has links)
Sandvik Coromant in Gimo, Sweden, is a world- leading supplier of tools and know- how for the metal cutting industry. This thesis was carried out on the maintenance division at the production plant producing tools for milling and drilling. The maintenance division is responsible for the maintenance of the machinery operating at all eight production units on the tool production plant. This thesis aims to map the value flow and non- value adding activities on the maintenance division and come up with suggestions for improvement. The study only focuses on the organizations work procedures and routines. The thesis began with a current state analysis of the maintenance division to find out how the activities, databases and service technicians interacts in daily operations. A time study showed that the proportion of non-value adding activities in some isolated cases was as low as 30%. The thesis ended in a root cause analysis, in form of a workshop, which aimed to, with help from the service technicians’ expertise and the researchers’ knowledge of lean production come up with solutions worth implementing on the maintenance division. The root cause analysis resulted in three solutions, which the researchers along with the service technicians sees as simple actions that will reduce the non-value adding time associated with the use, and handling of documentation. The analysis also resulted in sex actions seen as worth implementing, which however is more recourse demanding for the organization. / Sandvik Coromant i Gimo, Sverige, är en världsledande leverantör av verktyg och know- how för metallbearbetningsindustrin. Detta arbete utfördes på underhållsavdelningen vid fabriken för tillverkning av verktyg för borrning och fräsning. Underhållsavdelningen är ansvarig för underhållet av maskinparken på alla de åtta produktionsavsnitten vid fabriken för verktygstillverkning. Arbetet syftar till att kartlägga värdeflödet och icke värdeskapande tid vid underhållsavdelningen och komma med förbättringsförslag. Studien fokuserar enbart på organisationens arbetssätt och rutiner. Arbetet började med en nuvärdesanalys av underhållsavdelningen för att undersöka hur aktiviteter, databaser och servicetekniker fungera tillsammans i den dagliga verksamheten. En tidsstudie genomfördes för att undersöka hur mycket icke värdeskapande tid serviceteknikerna har vid en standardarbetsorder från produktionsavsnitten. Tidsstudien visade att andelen icke värdeskapande tid var så låg som 30 % i vissa isolerade fall. Arbetet avslutades i en rotorsaksanalys i form av en workshop, vilkens syfte var att med hjälp från serviceteknikerna och deras expertis tillsammans med kunskapen om lean production hos forskarna undersöka vilka lösningar som skulle minska denna siffra ytterligare. Rotorsaksanalysen resulterade i tre lösningar som forskarna tillsammans med serviceteknikerna ser som enkla åtgärder för att minska den icke värdeskapande tiden kopplad till användning och hantering av dokumentation. Analysen resulterade även i sex åtgärder som anses vara värd att implementera men som är mer resurskrävande för organisationen.
4

Integral model of maintenance management based on TPM and RCM principles to increase machine availability in a manufacturing company

Moscoso, Carlos, Fernandez, Alex, Viacava, Gino, Raymundo, Carlos 01 January 2020 (has links)
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / One of the main problems existing in manufacturing companies is the high frequency of machine breakdowns and their high repair time. Therefore, over time, various maintenance strategies seeking to more efficiently manage the scheduled jobs have been presented. However, these are not always as effective as expected, because they are not properly applied, the resources are not available, or the strategy is not aimed at directly solving the problem. Based on the aforementioned, this paper proposes an integral model of maintenance management based on the principles of total productive maintenance and reliability-centered maintenance methodologies in order to increase machine availability in a company in the manufacturing sector. To validate this proposal, a pilot project will be developed to measure the impact that is being sought.
5

Development of a Technical Procedure Manual for Norwegian

Franzén, Magnus, Gunnarsson, Kim January 2008 (has links)
<p>The purpose with a TPM is to ease the workload for both the maintenance organization and the airline. Until today Norwegian has had problems caused by absence of clear directives how the administrative work between the maintenance organization and the airline should go on. Norwegian wants a manual where issues about responsibility distribution, working procedures and the way of business are clearly illustrated and described. In this project we have focused on a couple of chosen procedures as “Technical Log Procedure”, “Work Order Procedure” and “Spare Part Procedure”. We have tried to create an easy-lucid and user-friendly manual as a result of flowcharts and declaring pictures. The work has been performed in Norwegian´s head office at Stockholm Arlanda Airport.</p>
6

Análisis y mejoras de la gestión del área de mantenimiento mecánico molienda procesos C2 de la planta concentradora de cobre de Sociedad Minera Cerro Verde Arequipa basado en la filosofía de mantenimiento productivo total

Aguilar Bustamante, Roberto Norbil 18 August 2018 (has links)
La presente investigación tiene como título “Análisis y mejoras de la gestión del área de mantenimiento mecánico molienda procesos C2 de la planta concentradora de cobre de Sociedad Minera Cerro Verde Arequipa basado en la filosofía de mantenimiento productivo total“ teniendo como objetivo principal plantear la mejora de procesos, con la finalidad de reducir los elementos que no generan valor y eliminar desperdicios. El planteamiento del problema se da a partir de la necesidad de tener gestión eficiente de los recursos que maneja en el área de Mantenimiento del área de Molienda de la planta concentradora de cobre, por lo que se plantearán elementos para de encontrar e implementar las herramientas necesarias para identificar y eliminar los elementos que no aportan valor a los objetivos. La investigación se centra en la aplicación de la filosofía del TPM utilizando las herramientas como el diagrama de Ishikawa, la técnica de los 5 porque, el árbol de decisiones entre otras para definir las causas y proponer las soluciones óptimas, producto de ello también se consideró la filosofía del as 5 S para la implementación del TPM. Entre los resultados que se espera obtener con la propuesta es la reducción de paradas por fallos, reducción de paradas por calidad, mejorar el entrenamiento del trabajador y su eficiencia.
7

Development of a Technical Procedure Manual for Norwegian

Franzén, Magnus, Gunnarsson, Kim January 2008 (has links)
The purpose with a TPM is to ease the workload for both the maintenance organization and the airline. Until today Norwegian has had problems caused by absence of clear directives how the administrative work between the maintenance organization and the airline should go on. Norwegian wants a manual where issues about responsibility distribution, working procedures and the way of business are clearly illustrated and described. In this project we have focused on a couple of chosen procedures as “Technical Log Procedure”, “Work Order Procedure” and “Spare Part Procedure”. We have tried to create an easy-lucid and user-friendly manual as a result of flowcharts and declaring pictures. The work has been performed in Norwegian´s head office at Stockholm Arlanda Airport.
8

Nyckeltal för effektivisering och förbättringsarbete / Key figures for effectivization and improvement work

Hamra, Ali, Abdulahad, Issa January 2021 (has links)
Företaget TPC Components AB som ligger i Västerås är ett av Europas ledande precisiongjuterier. För tillfället befinner sig TPC i ett läge där efterfrågan är så hög att produktionen inte hinner med och därmed försöker man höja produktionseffektiviteten och identifiera förlusterna som påverkar. Ett sätt för att följa upp och mäta produktionseffektiviteten är nyckeltalet OEE. Målet med detta projekt var att hjälpa till att introducera nyckeltalet OEE till TPC:s produktionsanläggning och ta fram ett förenklat verktyg för att beräkna ett värde och kunna följa upp det. Detta har gjorts genom studiebesök, analys av företagets data samt litteraturstudie kring ämnet. För att få enklare tillgång till företaget produktionsrelaterad data har gruppen fått ett användarkonto till bolagets administrativa system, ERP Monitor. Som resultat av dataanalysen kom gruppen fram till att det saknas data för att beräkna ett verklighetsbaserat OEE värde. Gruppen har ändå lyckats skapa ett verktyg som är anpassat för TPC för att beräkna och visualisera. För att ta fram ett bra verktyg har gruppen använt sig av programmeringsspråket Python som grund men även andra mjukvaror som Microsoft Excel. Med hjälp av verktyget kunde gruppen beräkna ett OEE värde för en arbetsvecka och detta har sedan visualiserats med hjälp av verktyget andra funktion. Det mätta OEE värde blev fel dock och det har sin grund i bristen på nödvändig data. Av litteraturstudien framgår det att många företag ser en utmaning med att implementera OEE eftersom datainsamlingen kan vara svår och tidskrävande. En handbok för OEE har även skapats där man beskriver enkelt om OEE och hur beräkningen går till. Handboken riktar sig mot arbetarna för att informera om vilka saker som påverkar effektiviteten. Slutligen ger handboken några rekommendationer på vilka parametrar som behöver mätas och registreras för att kunna implementera OEE i framtiden. / TPC Components AB, which is located in Västerås is one of Europe's leading investment casting companies. At the present time, TPC is in a state where the demand is so high that the production does not have enough time to catch on and thus, they are trying to increase the production efficiency and identify the losses that are affecting. One way to follow up and measure production efficiency is the KPI OEE.The aim of this project was to help introduce the key figure OEE to TPC's production facility and to develop a simplified tool for calculating a value and being able to follow it up. This has been done through study visits, analysis of the company's data and a literature study on the subject. To gain easier access to the company's production-related data the group has been given an user account for the company’s administrative system, ERP Monitor. As a result of the data analysis, the group came to the conclusion that there is no data to calculate a reality-based OEE value. Nevertheless, the group has managed to create a tool that is adapted for TPC to calculate and visualize the value for the future. To develop a good tool, the group has used the programming language Python as a basis as well as other softwares such as Microsoft Excel.By using the tool, the group were able to calculate an OEE value for a workweek as well as visualizing it with the tools other functions. The measured OEE value is wrong and it is due to the lack of necessary data. The literature study shows that many companies see a challenge in implementing OEE because data collection can be difficult and time consuming.A handbook for OEE has also been created where simple descriptions of OEE and how the calculation is done. The handbook is aimed for workers to inform them about the things that can affect efficiency. Finally, the handbook provides some recommendations on which parameters that needs to be measured and registered in order to be able to implement OEEin the future for TPC.
9

Secure key management in a trusted domain on mobile devices

Solsjö, Oskar January 2015 (has links)
As mobile devices manage more and more sensitive information they have become a more targeted platform to exploit. To maintain system integrity while providing a highly responsive product, platform developers have developed hardware as well as software solutions to improve security. Until recently however, it was only possible to devise hardware solutions to achieve the security requirements of EU’s Restricted VoIP protocol. This thesis investigates whether a software solution can provide the necessary levels of assurance to protect EU Restricted Voice over Internet Protocol (VoIP) communications. The thesis covers a literature study over possible approaches to protect sensitive information, which was used in the risk analysis to derive five tests to evaluate the trusted execution environment. The tests show that the trusted execution environment does provide good protection but that the implementation and design greatly influence the robustness and level of assurance that can be expected from the trusted execution environment.
10

Analysis and metric development for the study of viscoelastic thin films utilising a quartz crystal microbalance

Mcnamara, Thomas January 2016 (has links)
The aim of this thesis is the creation of a set of tools for the quartz crystal microbalance (QCM-D) that aid in the measurement and quantification of soft viscoelastic thin films and experimental work demonstrating their use. The QCM-D is an acoustic technique that monitors structural changes occurring at the sensor's surface via changes in the sensor's resonance frequency and the rate of mechanical energy loss (dissipation). As a first approximation, the frequency shifts are used to measure mass changes on the sensor's surface, and dissipation shifts used to quantify changes in the rigidity of the film. Use of the QCM-D responses in this manner requires that the film is acoustically thin and rigid, limiting its application to soft films. To quantify mass and viscoelastic changes using the QCM-D, soft films either need to be approximated to a thin, rigid layer, or the frequency and dissipation responses modelled using a viscoelastic model. Such an approximation leads to the encompassment of all the viscoelastic properties into the single dissipation measurement in addition to potentially introducing errors in mass calculations. Existing commercial software allows for the deconvolution of film parameters such as the shear modulus and viscosity by fitting experimental data to a viscoelastic model. This analysis can only be done after the experimental data is collected however, and provides no guidance on future experiments, also commonly requiring an initial estimate of the parameter values under investigation. I have developed an experimental optimisation tool, termed the total parameter matrix sensitivity (TPM-sensitivity). It is defined as the Jacobian determinant of the QCM-D responses with respect to the parameters under investigation, e.g. the film's height, density, viscosity and shear modulus and the bulk fluid's density and viscosity. TPM-sensitivity is a measure of how readily resolvable and separable the film and bulk are when analysing the QCM-D responses. This enables the user to select the most mathematically important harmonics, and using this I was able to experimentally resolve the viscoelastic information of a soft film using frequency responses alone. I have also defined a classification system which categorises the QCM-D responses relative to a perfectly rigid and thin film. This provides guidance on the level of analysis required to gain information about the film parameters, with the limitations of commonly applied rules of thumb also demonstrated. Examples using these computational tools and metrics are also presented with data I obtained experimentally and from the literature. Of the experimental investigations, the curing process of a bulk elastomer is of particular importance due to the film being both soft and acoustically thick, demonstrating QCM-D use for a film not complying to either of thecommonly used film approximations.

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