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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.
11

Enterprise resource planning systems selection in the wine industry of the Western Cape : a qualitative case study

Wiid, Hermanus Jacobus 12 1900 (has links)
Thesis (MA (Information Science))--Stellenbosch University, 2011. / ENGLISH ABSTRACT: The globalised business environment of the 21st century is a complex space for organisations to navigate. As a means of dealing with the challenges and demands brought about by increased interconnectedness and interdependence, organisations are increasingly turning to information and communication technology (ICT), and especially advanced forms of ICT such as enterprise resource planning (ERP) systems. An ERP system encompasses the promise of a seamless integration of business processes to be managed by a single business software application, which can be used to increase competitiveness and assist managers in strategically positioning their organisations for the future. This is especially true in the case of small to medium-sized enterprises (SMEs) which constitute a large and important part of the economies of numerous countries. As the ERP systems market for larger organisations became saturated at the beginning of the previous decade, ERP system vendors started to target SMEs by developing smaller and less expensive software solutions specifically aimed at this market segment. However, research has shown that these enterprises differ from their larger counterparts in size-specific and industry-specific ways which can greatly affect their acquisition of ERP systems: SMEs often face severe resource constraints and cannot afford the costs associated with failed ERP system implementation efforts. As a result, it becomes all the more important to follow a proper ERP system selection procedure before committing scarce and irrevocable resources to implementation. The purpose of this thesis is to define and describe the size-specific and industryspecific factors that play an important role during ERP system selection (Chapter 1). ERP system selection factors in the literature are summarised and synthesised into a comprehensive framework used to guide the execution of the study (Chapter 2). To this end, a qualitative case study was conducted on an SME in the wine industry of the Western Cape that was in the process of selecting an ERP system. Data were collected by critically analysing and reviewing documents, conducting direct observations of requirements analysis meetings and interviewing participants purposefully selected for the study (Chapter 3). Five major themes emerged from the analysis of the collected data and from this a total of 14 selection factors are identified (Chapter 4). These results largely corroborate existing selection factors from the literature and allows ideas proposed by various authors to be expanded on. In this way, a theoretical foundation is laid for the development of an ERP system selection model for SMEs in the Western Cape wine industry in future research (Chapter 5). The contribution of this research lies in the emphasis it places on the different benefits and shortcomings present in each quadrant of the proposed model and the explanation it provides for how this influences a selection factor trade-off that is unique to each organisation and the industry it operates in. This insight can be used to direct the ERP system selection process. / AFRIKAANSE OPSOMMING: Die geglobaliseerde besigheidsomgewing van die 21ste eeu is ’n komplekse ruimte waarbinne organisasies moet navigeer. Daarom wend organisasies hulle toenemend tot informasieen kommunikasietegnologie (IKT), en veral ondernemingshulpbronbeplannings (OHB)- sisteme, in ’n poging om hierdie arena se uitdagings en vereistes wat deur toenemende interverbinding en -afhanklikheid meegebring word die hoof te bied. ’n OHB-sisteem dra die belofte van ’n uniforme integrasie van besigheidsprosesse wat deur ’n enkele besigheidsagtewareprogrammatuur bestuur kan word. Dit kan aangewend word om mededingendheid te bevorder en om bestuurders by te staan om hul organisasies strategies te posisioneer vir die toekoms. Dit is veral van toepassing in die geval van klein- tot medium-grootte ondernemings (KMOs) wat ’n groot en belangrike deel van die ekonomieë van verskeie lande verteenwoordig. Teen die begin van die vorige dekade het OHB-sisteemverkopers hul fokus van groot ondernemings na KMOs verskuif deur kleiner en goedkoper sagteware te ontwikkel wat spesifiek op hierdie marksegment gemik was. Navorsing het egter bewys dat hierdie ondernemings van hul groter eweknieë verskil in terme van grootte en industrie en dat dit ’n beduidende impak kan hê op die verwerwing van OHB-sisteme: KMOs ervaar dikwels ernstige hulpbrontekorte en kan nie die koste verbonde aan mislukte OHBsisteemimplementering bekostig nie. Gevolglik raak dit toenemend belangrik dat hierdie ondernemings ’n behoorlike OHB-sisteemseleksieprosedure volg, voordat skaars en onvervangbare hulpbronne aan die implementering van dié sagteware bestee word. Die doel van hierdie tesis is om die grootte- en industrie-spesifieke faktore wat ’n belangrike rol gedurende OHB-sisteemseleksie speel te definieer en te beskryf (Hoofstuk 1). OHB-sisteemseleksiefaktore in die literatuur is opgesom en saamgevat in ’n omvattende raamwerk wat die uitvoering van die studie gerig het (Hoofstuk 2). ’n Kwalitatiewe gevallestudie is gevolglik uitgevoer op ’n KMO in die Wes-Kaapse wynindustrie wat besig was om ’n OHB-sisteem te selekteer. Data is ingesamel deur dokumente krities te analiseer en te hersien, deur direkte observasies van behoefte-analise-vergaderings te maak en onderhoude te voer met deelnemers aan die studie, wat spesifiek vir hierdie doel geselekteer is (Hoofstuk 3). Vyf prominente temas en ’n totaal van 14 seleksiefaktore is vanuit die analise van die data bepaal (Hoofstuk 4). Hierdie resultate bevestig grotendeels bestaande seleksiefaktore in die literatuur en fasiliteer die verdere uitbou van bestaande idees van verskeie outeurs. Op hierdie manier word ’n teoretiese grondslag vir die ontwikkeling van ’n model vir OHB-sisteemseleksie in toekomstige navorsing gelê (Hoofstuk 5). Die bydrae van hierdie navorsing lê in die klem wat dit plaas op die verskillende voor- en nadele teenwoordig in elke kwadrant van die voorgestelde model en in die verduideliking van die impak daarvan op ’n uitruiling van seleksiefaktore wat uniek is aan elke organisasie en die industrie waarin dit werksaam is. Hierdie insig kan uiteindelik gebruik word om die OHB-sisteemseleksieprosedure te rig.
12

Commissioning new applications on processing machines: Part I - process modelling

Troll, Clemens, Schebitz, Benno, Majschak, Jens-Peter, Döring, Michael, Holowenko, Olaf, Ihlenfeldt, Steffen 08 June 2018 (has links)
The subject of this splitted article is the commissioning of a new application that may be part of a processing machine. Considering the example of the intermittent transport of small-sized goods, for example, chocolate bars, ideas for increasing the maximum performance are discussed. Starting from an analysis, disadvantages of a conventional motion approach are discussed, and thus, a new motion approach is presented. For realising this new motion approach, a virtual process model has to be built, which is the subject of this article. Therefore, the real process has to be abstracted, so only the main elements take attention in the modelling process. Following, important model parameters are determined and verified using virtual experiments. This finally leads to the possibility to calculate useful operating speed–dependent trajectories using the process model.
13

Modeling of a Modular Discrete Event Simulation for Fuel Cell Assembly within a Factory Model

Brützel, Oliver, González Di Miele, Román Ignacio, Overbeck, Leonard, May, Marvin Carl, Lanza, Gisela 27 May 2022 (has links)
Nowadays, shorter product life cycles and fluctuating demand quantities require flexible and adaptable production planning techniques. Fuel cell technology offers an innovative product, for which future demands in terms of quantities and variety are difficult to predict making it hardly possible to plan demand-adequate production capacities. One feasible solution is the application of Discrete Event Simulations (DES) with a high degree of adaptability and scalability. In this paper, a concept for the modular simulation of assembly lines with scalable automation is introduced and applied to an assembly line for fuel cell stacks. The model presents a modular and hierarchical system structure, which allows for adaptability and reusability. The model can be easily integrated on a factory level to study the behavior of parallel assembly lines. For an industrial use case different experiments offer valuable insights for the optimization, the automation and the upscaling of the assembly. / Kürzere Produktlebenszyklen und schwankende Bedarfsmengen erfordern heute flexible und anpassungsfähige Produktionsplanungstechniken. Die Brennstoffzellentechnologie bietet ein innovatives Produkt, dessen zukünftige Nachfrage hinsichtlich Stückzahl und Vielfalt nur schwer vorhersehbar ist und somit kaum bedarfsgerechte Produktionskapazitäten planbar sind. Eine mögliche Lösung ist die Anwendung von Discrete Event Simulations (DES) mit einem hohen Maß an Anpassungsfähigkeit und Skalierbarkeit. In diesem Beitrag wird ein Konzept zur modularen Simulation von Montagelinien mit skalierbarem Automatisierung vorgestellt und auf eine Montagelinie für Brennstoffzellenstacks angewendet. Das Modell nutzt eine modulare und hierarchische Systemstruktur, die Anpassungsfähigkeit und Wiederverwendbarkeit ermöglicht. Das Modell kann leicht auf Fabrikebene integriert werden, um das Verhalten paralleler Montagelinien zu untersuchen. Für einen industriellen Anwendungsfall bieten verschiedene Experimente wertvolle Erkenntnisse zur Optimierung, Automatisierung und Hochskalierung der Montagelinie.
14

Flight Management System Model / Flight Management System Model

Franěk, Lukáš January 2011 (has links)
Diplomová práce shrnuje nejdůležitější informace o letectví, jako například základní používané termíny, popis letových fází apod. V této práci je popsán flight management system, jeho funkce a schopnosti vytvořit cenově příznivý a současně absolutně spolehlivý letový plán. V další části práce je nastíněna důležitost předpovědi počasí pro bezpečnou a současně cenově příznivou leteckou dopravu. Tato práce je vytvořena v programu Matlab a všechny bloky jsou naprogramovány jako m-funkce. Důležité části kódu jsou z důvodu názornosti zobrazeny jako vývojové diagramy. Praktická část práce je rozdělena do několika podkapitol, kde každá podkapitola popisuje jeden blok z blokového schématu pro výpočet nejistoty odhadované doby příletu. Současně je zde vysvětlena funkce ostatních bloků pro plánování letu, předpověď počasí, kombinování větrů a výpočet odhadnuté doby příletu a její nejistoty.

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