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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

A comparison of wet manual cleaning processes to carbon dioxide cleaning processes in the semiconductor industry

Tourdot, Justin M. January 2001 (has links) (PDF)
Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2001. / Includes bibliographical references.
2

Study on Architecture-Oriented Production Equipment Management

Yang, Tien-Lung 13 January 2008 (has links)
As the globalization trend going on, the Taiwan¡¦s steel import tariff has been reduced to almost nil customs duties after joining in the World Trade Organization. Taken to be a result of continuous investment in enhancing and enlarging output capabilities made by local steel manufacturers, the domestic steel markets are showing a tendency to a surplus status of supply over demand. The steel companies in Taiwan are faced with much stricter economic surrounding. Therefore, it is first priority that any enterprise must do well on internal improvement in order to keep its competitiveness. This research aims to setup Architecture-Oriented Production Equipment Management Model (AOPEMM). The results will be provided to the coated/galvanized plate steel products as reference of the Production Equipment Management. In this research, we first set up the roadmap of Architecture-Oriented Production Equipment Management Model. In the roadmap of AOPEMM, structure element diagrams, structure element service diagrams, structure behavior coalescence diagrams, and sequence diagrams are constructed accordingly. Through repeating of this construction, we then achieve an optimization of the AOPEMM. We compare AOPEMM with Non-Architecture-Oriented Production Equipment Management Model (NAOPEMM) using six measurement indicators, such as organization, personnel, task, technology, communication interface and integration of the resources. Strength of AOPEMM and Weakness of NAOPEMM are validated to support the argument of this research.
3

Remanufacturing Versus New Acquisition of Production Equipment: Definitions and Decision-making Checklist

Yang, Qi January 2014 (has links)
With technology changing at a dramatic pace, entrepreneurs may assume that acquiring the newest production equipment available is the best option. But that is not always the case. It is important to first assess the needs in order to decide whether new or remanufactured production equipment is the best alternative. Investment on production equipment can be initiated due to existing equipment cannot handle capacity; products evolve and changes needed to meet market requirement; to continuously improve production system; or the general requirements for quality, environment, economy and safety. However, the study reveals that it has received only limited attention from academics and practitioners regarding to whether decide to remanufacture or new acquire production equipment. Further, the framework visualizes the complexity of managing decision-making between production equipment remanufacturing and new acquisition. The study employs qualitative method by conducting literature review, interviews, brainstorming sessions, benchmarking, and observation to build the theoretical framework and collect empirical data. The thesis identifies the differences between production equipment remanufacturing and new acquisition; distinguishes the different levels of production equipment, proposes a new definition of production equipment remanufacturing; and analyses factors should be considered for the decision-making process. Altogether, the findings provide strong evidence to propose a decision-making checklist in decisions between production equipment remanufacturing and new acquisition.
4

Improving lead time of semiconductor processing equipment

Honnold, Mark T. January 2009 (has links) (PDF)
Thesis PlanB (M.S.)--University of Wisconsin--Stout, 2009. / Includes bibliographical references.
5

Diskussionsbeitrag zu einem methodischen Ansatz für Entscheidungen in Zielkonflikten während der Konzeptphase der Entwicklung automatisierter Produktionsanlagen

Lochmann, Peter, Majschak, Jens-Peter 06 September 2021 (has links)
Die wesentlichen Eigenschaften eines technischen Systems werden bereits in der Konzeptphase durch die Auswahl von Lösungsprinzipien vorbestimmt. Bei der Entwicklung automatisierter Produktionsanlagen stehen dabei die vier Zielgrößen Qualität, Zeit, Kosten und Flexibilität im Fokus. In der Literatur wird angenommen, dass zwischen diesen Anforderungen ein Zielkonflikt besteht, der von den Eigenschaften eines technischen Systems herrührt und die gleichzeitige Optimierung einer Anlage bzgl. aller vier Zielgrößen unmöglich macht. In diesem Beitrag wird deshalb ein methodischer Ansatz zu Diskussion gestellt, der die Untersuchung des Zielkonfliktes im konkreten Anwendungsfall ermöglicht und eine Entscheidungshilfe bei der Auswahl von Lösungskonzepten bieten kann. Ausgangspunkt ist ein dynamisches Systemmodell der Wechselwirkung zwischen Produkt und Produktionsanlage, sowie ein Ansatz zur Konzeptauswahl auf Grundlage der Polyoptimierung. Mit Hilfe parametrischer Modellbildung und Simulation kann die Entwicklungsaufgabe als mehrkriterielles Optimierungsproblem formuliert werden.
6

Monitorování výrobních zařízení / Monitoring of production facilities

Borsuk, Adam January 2020 (has links)
The aim of the diploma thesis is to study the possibilities of creating a monitoring system for older production facilities already in operation. Select the necessary components for the nature of the equipment to create a system that is able to capture and provide information about activities on the equipment. The second goal is to design a suitable communication model for clear information about the operation, sending and storing data. The third goal is to analyze the dual-core ESP32 microprocessor against its predecessors in the role of system control unit.
7

Circular production investments : What a circular production investment is and how it can be designed

Bohlin, Lotta January 2023 (has links)
One of the biggest emitters of greenhouse gas in Sweden is the industry sector, and in order to reach the national and global environmental goals, a change is needed. To become an environmentally sustainable producer, the whole life cycle must be taken into consideration, from choice of resources, to production, to use, and End-of-Life treatment. This thesis covers production, more particularly production equipment and the sustainability aspect circularity. Two research questions are answered; what is a circular production investment, and how can a production investment be designed to reach a higher level of circular maturity? Circularity, or circular economy, aims to close the loop of resources, and this thesis covers various aspects of how production equipment, and investments of production equipment can be designed to achieve that. The frame of reference presents models and tools for circularity, as, for instance, life cycle assessment, life cycle cost, life cycle extension strategies, eco-design, and servitization. This research was done through a literature review, a survey, in-depth-interviews, and a final validation workshop. It has been found that there are many aspects to consider when investing in production equipment, but also that there is a knowledge gap in industry of what circularity is and how to prioritize circularity in the requirements from customer to supplier. This thesis was written as a part of a collaborative research project between academy, research, and industry. The findings in this thesis were used to develop three guidelines made for practical implementation within industry, they cover considerations before investing in new production equipment, how to design production equipment in the most circular way, and considerations at End-of-Life or End-of-Use for production equipment. In order for a production investment to be circular, it is required that the treatment of equipment at its End-of-Life is planned already in the design phase of the investment, and that an investment is implemented only if there are no other options. / En av de största utsläpparna av växthusgaser i Sverige är industrisektorn, och för att kunna nå både nationella och internationella miljömål måste något förändras. För att kunna bli en miljövänlig producent måste hela livscykeln av ens produkter övervägas, från val av resurser, till produktion, till användning och behandling av uttjänta produkter. Den här uppsatsen täcker produktion, mer precis täcker den produktionsutrustning och hållbarhetsaspekten cirkularitet. Två forskningsfrågor besvaras; vad är en cirkulär produktionsinvestering och hur kan en produktionsinvestering planeras för att nå en högre nivå av cirkulär mognad? Cirkularitet, eller cirkulär ekonomi, är när man försöker stänga ”loopen” (cirkeln/slingan) av resurser. Den här uppsatsen täcker olika aspekter av hur produktionsutrustning och investeringar av produktionsutrustning kan planeras för att nå en sluten loop. I det teoretiska ramverket för uppsatsen finns olika modeller och verktyg för cirkularitet, som exempelvis livscykelanalys, livscykelkostnad, strategier för att förlänga livscykeln, eco-design och servitisering. Den här studien gjordes genom en litteraturstudie, en enkät, intervjuer, och en workshop för validering. Det har framkommit att det finns många aspekter att överväga när man investerar i produktionsutrustning, men också att det finns en kunskapslucka inom industrin gällande vad cirkularitet är och hur man ska prioritera cirkularitet i kravspecifikationer till sina leverantörer. Den här uppsatsen skrevs inom ett forskningsprojekt som är ett samarbete mellan akademi, forskning och industri. Det som har hittats genom den här undersökningen har använts för att utveckla tre riktlinjer som ska kunna användas inom industrin. De täcker avväganden före en investering av produktionsutrustning, hur produktionsutrustning kan designas på det mest cirkulära sättet och avväganden vid behandling av uttjänt produktionsutrustning. För att en produktionsinvestering ska vara cirkulär krävs det att behandling av uttjänt utrusning planeras redan i designstadiet av investeringen, samt att investeringen genomförs endast om det inte finns några andra alternativ.
8

Методический подход к повышению эффективности использования производственного оборудования газотранспортных предприятий : магистерская диссертация / Methodical approach to increasing the efficiency of using the production equipment of gas transmission enterprises

Березовская, С. И., Berezovskaya, S. I. January 2021 (has links)
Актуальность формирования методического подхода к повышению эффективности использования производственного оборудования газотранспортных предприятий, обусловлена тем, что в условиях, когда сырьевые и энергетические ресурсы истощаются, а требования к сохранению окружающей среды становятся все более строгими, одним из основных факторов, определяющих конкурентоспособность отдельных предприятий и страны в целом, становится состояние производственного оборудования, а также система его эксплуатации и показатели эффективности использования. Целью написания магистерской диссертации является разработка методического подхода к повышению эффективности использования производственного оборудования газотранспортных предприятий. В представленной работе изучению подлежат теоретические и методические аспекты процесса управления и оценки эффективности эксплуатации производственного оборудования на газотранспортных предприятиях. Результаты обобщения и систематизации указанных теоретических и методических аспектов позволили сформировать комплексный методический подход к повышению эффективности использования производственного оборудования газотранспортных предприятий. В качестве источников информации, используемой в процессе написания представленной магистерской диссертации, выступила научно-исследовательская, учебная и методическая литература по проблеме исследования, данные финансовой отчетности и внутренней документации исследуемого газотранспортного предприятия, а также результаты эмпирических исследований, проводимых автором в процессе написания работы. / The relevance of the formation of a methodological approach to improving the efficiency of using the production equipment of gas transmission enterprises is due to the fact that in conditions when raw materials and energy resources are depleted, and the requirements for environmental preservation are becoming more stringent, one of the main factors determining the competitiveness of individual enterprises and a country in In general, the state of production equipment becomes, as well as the system of its operation and indicators of efficiency of use. The purpose of writing a master's thesis is to develop a methodological approach to increasing the efficiency of using the production equipment of gas transmission enterprises. In the presented work, the theoretical and methodological aspects of the process of management and evaluation of the efficiency of the operation of production equipment at gas transmission enterprises are subject to study. The results of the generalization and systematization of the above theoretical and methodological aspects have made it possible to form an integrated methodological approach to increasing the efficiency of using the production equipment of gas transmission enterprises. The sources of information used in the process of writing the presented master's thesis were research, educational and methodological literature on the research problem, data from financial statements and internal documentation of the investigated gas transportation enterprise, as well as the results of empirical research conducted by the author in the process of writing the work.
9

Differences in Lengths of Life of Production Equipment & Production Systems and their implications on Acquisition & Replacement Processes

Karim, Aria, Schnelzer, Anna January 2015 (has links)
Nowadays usage of advanced production equipment becomes more common among production industries, future challenges in the market require flexibility in production industries due to growing competition and demand responses. Decisions regarding acquisition and replacement of production equipment have a major role in future profitability and competitiveness of production industries. Production equipment life cycle is dependent on technical, economical and conceptual lengths of life. Technical and economical lengths of life are connected to production equipment and the conceptual length of life is connected to production systems. Acquisition and replacement assessment processes of production equipment within production industries require involvement from different responsible departments. Varieties of perspectives differ from different departments in their prioritization regarding economical, technical and conceptual lengths of life. Lack of collaboration and evaluation of critical factors create quality and capacity issues in production industries. This project is directed to investigate issues concerning establishment of a sustainable long term thinking in consideration of economical, technical lengths of life of production equipment and also conceptual length of life of production systems in an earlier stage of acquisition and replacement assessment processes. Investigated research questions in this project are the following; What is the correlation between lengths of life of production equipment & production systems and how they influence each other? What is the basis for acquisition and replacement assessment of production equipment? How does buyer-supplier relationship influence length of life of production equipment? This thesis work is based on both theoretical and empirical findings. A case study was performed with a survey and interviews to gather data for the analysis. Technical and conceptual lengths of life are both based on economical profitability and have to be adapted to product generations. Expensive investments in production equipment are critical and can be risky for production industries if marketing experts are excluded or if future product generation forecast are not considered in production equipment acquisition processes. Information and knowledge inputs from production equipment suppliers have to be considered in an earlier stage of concept development in production systems. / Nuförtiden blir användandet av avancerade produktionsutrustningar allt vanligare inom produktionsindustrin, framtida utmaningar i marknaden kräver flexibilitet inom produktionsindustrin på grund av växande konkurrens och respons på efterfrågan. Beslut gällande anskaffning och utbyte av produktionsutrustningar spelar en stor roll i produktionsindustrins framtida lönsamheter och konkurrenskraftighet. Produktions-utrustningars livscykel är beroende av teknisk, ekonomisk och konceptuell livslängd. De tekniska och ekonomiska livslängderna är kopplade till produktionsutrustningar medan den konceptuella livslängden är kopplad till produktionssystemet. Bedömningsprocessen vid anskaffning och utbyte av produktionsutrustningar inom produktionsindustrin kräver delaktighet från olika ansvariga avdelningar. Perspektiv variationer och prioriteringar gällande ekonomisk, teknisk och konceptuell livslängd skiljer sig mellan olika avdelningarna. I brist på samarbete och utvärderingar av kritiska faktorer skapas kvalitets- och kapacitetsproblem inom produktionsindustrin. Detta projekt utreder problem gällande etablering av ett hållbart och långsiktigt tänkande med hänsyn till ekonomisk och teknisk livslängd av produktionsutrustningar samt konceptuell livslängd av produktionssystemet i ett tidigare skede av bedömnings-processen. Följande forskningsfrågor har undersökts i detta projekt: Vilken effekt har olika livslängder på produktionsutrustningar samt produktionssystemet, och vad har de för koppling? Vad är grunden för anskaffnings- och utbytesbedömningar av produktions-utrustningar? Hur inverkar relationen mellan köpare och leverantörer på livslängden av produktionsutrustningar? Detta examensarbete är baserat på både teoretiska och empiriska undersökningar. En fallstudie genomfördes med en enkät och intervjuer för att samla in data till analysen och besvara forskningsfrågorna. Den tekniska och konceptuella livslängden är båda baserande på ekonomisk lönsamhet och måste anpassas till produktgenerationer. Dyra inverteringar i produktions-utrustningar är kritiska och kan vara riskabla för produktionsindustrin om marknads-experter är uteslutna eller om framtida produktgenerations prognoser inte beaktades i anskaffningsprocessen. Information och kunskap från leverantörer av produktions-utrustningar måste beaktas i ett tidigt skede vid konceptutveckling inom produktions-system.
10

Fuzzy criticality assessment for process equipments maintenance

Qi, Hong Sheng, Liu, Q., Wood, Alastair S., Alzaabi, R.N. January 2012 (has links)
- / Criticality-based maintenance (CBM) is a prioritized approach to the maintenance of (industrial) process equipment. CBM requires personnel with a thorough knowledge of the process/equipment under scrutiny. In this paper a criticality assessment system that is implemented by a local company (which represents the expertise and knowledge of the company experts) is reviewed and fuzzy logic theory is applied to improve the system's capability and reliability. The quality of the fuzzy system is evaluated based on several case studies. The results show that the fuzzy logic based system does not only what the conventional system does, but also outperforms in terms of reliability and has a unique ranking capability.

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