Vonasek, Scott M.
(has links) (PDF)
Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2000. / Includes bibliographical references.
The research is aimed at furthering knowledge in the research fields of management accounting, operations management, performance measurement, and management strategy. The research theme of developing a holistic management philosophy based upon the theory of constraints led the research across the various fields of knowledge. Traditional views within some aspects of the literature were challenged and an exploration into the gaps within existing knowledge was made. The research questions were derived from the literature and tested via an action research methodology, which looked at both academic rigour and practical relevance. The methodology was applied to a SME which had successfully adopted the theory of constraints and was experiencing difficulties in translating short-run optimisation into strategic direction. Through the participation of the research team the research questions were tested with the results providing an incremental step towards a greater understanding of the research fields. / The dissatisfaction with the accounting treatment of manufacturing costs resulted in research activity into alternative costing and decision making models. Ultimately the goal of management accounting is to provide information from which to make tactical and strategic decisions. The initial stage of research is aimed at providing an alternative system from which to make operational decisions. The alternative system presented is heavily set within the theory of constraints, with good evidence exemplifying the superiority of such a system for tactical decision making such as outsourcing, pricing and investing. The superiority of this system is hamstrung when the scope of the decision making extends beyond the short-term horizon. To extend the management philosophy beyond this limitation the introduction of an agile strategy was adopted. / Agility was put forward as a solution to achieving and sustaining a competitive advantage within a new manufacturing paradigm of mass customisation. The characteristics of responsiveness and speed epitomise the market demand for customised products at mass produced lead times and prices. The gap in the operations management literature lies in the lack of research regarding the attainment of agility. While the characteristics and benefits of agility are well documented in the literature, the creation of a set of guidelines to achieve agility has eluded researchers and has been the subject of calls for future research. What is argued is that through the merger of several management theories and techniques, agility can be achieved. More succinctly, the key resources of the business, as identified via the resource-based view of the firm, are maintained through the adoption of the theory of constraints’ five step process. This ensures that key resources are supported by the business and maintained to a level sufficient enough to possess agile characteristics. / The catalyst in creating this holistic management framework is the performance measurement system based on the balanced scorecard. The financial measures were replaced with throughput measures, the strategic focus was driven by agility and the population of the measures was derived via a resource-based view perspective. Through the combination of an agile strategy and a performance measurement system the research theme of developing a holistic management philosophy based upon the theory of constraints was achieved. Although the research limitation of one research site may limit the generalisability of the findings, the merger of various management philosophies, techniques, and tools has not previously been undertaken. Furthermore, such an endeavour to lay down the platform for achieving agility by extending the scope of the theory of constraints has not been explored. This unique approach across several well-researched fields of knowledge presents a contribution to knowledge. / Thesis (PhDBusinessandManagement)--University of South Australia, 2007.
Thesis (M. Eng.)(Technology management)--University of Pretoria, 2004. / Includes summary. Includes bibliographical references (Includes bibliographical references (leaves 12-1-12-7).
De Klerk, Schalk Willem.
Thesis (M.Sc.)(Project Management)--University of Pretoria, 2005. / Includes bibliography. Includes bibliographical references. Available on the Internet via the World Wide Web.
Anthonissen, Carel Aäron.
Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.
Malherbe, Johannes Louw
Thesis (MEng)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: The goal of this thesis is to provide a stepping-stone for the design and development of a software package that implements the Goal System Algorithm, based on the Theory of Constraints (TOC). This includes the complete description and explanation of the Goal System Algorithm (GS), as well as the partial implementation of this algorithm using Microsoft Access as a Database Management System (DBMS) and Microsoft Visual C++ as programming language. The main development effort was put into the development of a scheduling algorithm and the implementation of a data structure that lies at the core of this algorithm. The reason for the development of such a package is that it will aid a production manager, working in a small to medium size job-shop, in generating a schedule for production that will increase throughput, while simultaneously reducing both inventory and operating expense thereby generating profits and cash flow. With regard to this thesis and the overall project goal the following have been achieved. 1. The complete project has been researched, scoped and each step has been explained. 2. The complete program structure has been defined and broken into two separate modules; the Data Mining and Conversion Module and the TOC Scheduling Algorithm. 3. The database containing all the MRP data necessary for scheduling has been designed and implemented using a MS Access database with an ODBC connection. An ODBC connection to the database was used so that a smooth transmission to other database management systems can be made. 4. The TOC Scheduling Algorithm has been developed and the following have been implemented: • A basic user interface has been created for the insertion of all the user input and to display the constraint schedule. • A data structure called a linked list has been developed and used to store the scheduling data in memory. • The complete GS algorithm had been researched and explained. • The GS algorithm has been and implemented and tested up to the point where it schedules the constraint. • The pseudo code for the part of the GS algorithm that was not implemented has been documented and included in this report. More development needs to be done and a proper Graphical User Interface must also be created to complete this project, but after completion a Toe software package will exist that is completely unique in South Africa and the market potential for this package will be considerable. / AFRIKAANSE OPSOMMING: Die doel van hierdie tesis is om die grondslag te skep vir die ontwerp en ontwikkeling van 'n sagteware pakket wat Goldratt se Doel Sisteem Algoritme, gebasseer op die 'Theory of Constraints', implementeer. Dit sluit die gedetaileerde beskrywing van die Doel Sisteem Algoritme in en 'n gedeeltelike implementasie van die algortime, deur gebruik te maak van 'n Microsoft Access databasis as databasis bestuur sisteem en Microsoft Visual C++ as 'n programerings taal. Die hoof klem is gelê op die ontwikkeling van die skedulerings algortime en die implementasie van die strukture wat deel van die kern uitmaak van die algoritme. Die hoof rede vir die ontwikkeling van so 'n pakket is sodat dit 'n produksie bestuurder van 'n klein to medium grootte vervaardigings besigheid sal help om 'n skedule vir produksie the genereer wat die vloer se deurset sal verhoog, terwyl dit voorraad en operasionele kostes sal verlaag. Met ander woorde dit sal die besigheid help om meer geld te maak huidiglik en in die toekoms. Met betrekking tot die tesis en die algehele projek doel is die volgende bereik: 1. Die hele projek is nagevors, uit een gesit en verduidelik. 2. Die hele program struktuur is gedefinieer en opgebreek in twee aparte modules; nl. die 'Data Mining and Conversion Module' en die 'TOC Scheduling Algorithm'. 3. Die databasis wat al die nodige MRP inligting bevat wat benodig word vir skedulering is ontwerp en geimplementeer deur gebruil te maak van 'n MS Access databasis met 'n ODBC konneksie. Daar is van 'n ODBC konneksie gebruik gemaak sodat as die nodig is, daar sonder enige moeite na ander databasis bestuurs sisteme oorgeskakel kan word. 4. Die 'TOC Scheduling Algorithm' is onwikkel en die volgende is geimplementeer. • A basisse gebruikers vlak is ontwikkel sodat al die nodig invoer data in die program ingevoer kan word. • 'n Geskakelde lys is ontwikkel en gebruik as die data struktuur om al die skedulerings informasie in geheue te stoor. • Die Doel Sisteem algorimte is in sy geheel verduidelik en gedokumenteer. Die Doel Sisteem algoritme is geïmplementeer tot op die punt waar dit die primêre bottelnek skeduleer. • Die pseudo kode vir die deel van die GS algoritme wat nie geimplementeer is nie is uitgelê in ingesluit as deel van die verslag. Verdere ontwikkeling word nog benodig en 'n beter gebruikers vlak moet nog geskep word om die projek te finaal afte handel, maar na dit gedoen is sal daar 'n TOe skedulering pakket bestaan wat heeltemal uniek is tot Suid-Afrika en 'n groot mark potensiaal sal hê.
An empirical exploration of supply chain constraints facing the construction industry in South AfricaPillay, Poobalan 28 May 2016 (has links)
The South African Construction Industry is one of the largest contributors to the gross domestic product of the country as well as to employment. It has, however, been experiencing significant challenges due to multifaceted factors. The main objective of this research was to identify the supply chain management constraints within the South African Construction Industry and how these can be overcome. This study is by nature descriptive and exploratory and contains qualitative elements. The problems were identified through a literature review, focused group discussions and interviews with major construction companies in South Africa. The findings also indicate that the main supply chain management constraints are to a greater extent internal and typical of supply chain methodologies and approaches. These constraints are among others the lack of coordination, collaboration and commitment between suppliers and clients within the supply chain, poor leadership in key areas of systems, design problems (many changes and inconsistent information), deficient internal and external communication and information transfer, inadequate management within the supply chain, mainly poor planning and control just to mention a few. A model based on supply chain system management as well as the Theory Of Constraints (TOC) has been developed that can be a useful tool to address the constraints in the construction sector. Originating from the study are applicable recommendations for the South African construction industry supply chains, covering key themes that have been articulated in the study, particularly benchmarking to the theory of constrains. Such recommendations include further research core components of supply chain such as, collaborations, logistics and how each of system components can be linked to performance of the supply chain management system.
Lokalisering av förbättringsområde : Enkla lokaliseringsmetoder för produktionsprocesser / Localization of improvement area : Simple location methods for production processesNilsson, Jacob, Stomberg, Pontus January 2016 (has links)
Detta examenarbete redogör och belyser hur en lokalisering av förbättringsområde inom en producerande process kan ske. Rapporten har sin grund i ett sökande efter var en effektivisering kan genomföras. Hur uppnås målet och finns det metoder som kan appliceras på en diversifierad mängd områden. Många företag och verksamheter har idag ett stort behov av förbättring. Detta för att kunna överleva det allt tuffare klimatet på marknaden. En konkurrenskraftig produkt både är pris- och kvalitetsmässigt i framkant krävs för att nå marknadsandelar. Undersökningen grundar sig i en nulägesanalys på ett verkligt företag för att göra undersökningen så rättvisande som möjligt. Rapporten redogör även för en undersökning av olika metoder från tidigare forskning inom lean och theory of constraints. Genom att använda sig av verktyg som 5S, JIT och koncept i sin helhet som lean och TOC kan en lokalisering av förbättringsområden ske. Genom att studera koncept som lean och TOC lokaliseras förbättringsområden med hjälp av deras grundläggande filosofi. De delar som finns i produktionen som bör tas i beaktning är omställningar, slöserier och begränsningar. Dessa tre faktorer påverkar en process negativt om de inte lokaliseras och effektiviseras eller elimineras. Den metod som bör användas varierar från fall till fall och det är av yttersta vikt att hitta en metod som fungerar bra för den egna processen. Det första som bör göras är att bli väl påläst och vara tydlig med vad metoden ska bidra med. De metoder som denna studie har granskat och visat sig fungera i en producerande process är: 5S, JIT, SMED samt TOC:s läran om flaskhalsar och leans läran om slöserier. Metoderna bidrar med olika sätt för lokalisering av förbättringsområden. / This report describes and illustrates how to locate an area for improvement in a producing process. The report is based on a search for where the streamlining can be performed. How can we achieve the goal, and are there methods that can be applied to a diverse range of areas. Many companies and businesses today have a great need for improvement, this in order to survive the increasingly tougher climate on the market. Where you now must be able to deliver a competitive product that is both price and quality at the forefront. The study is based on a situation analysis on a real business company, with a producing process, to do the survey as accurate as possible. The report also describes a study of the different methods from previous research in lean and TOC. By using tools such as 5S, JIT and concepts in its entirety as lean and TOC can you locate each one's areas of improvement. By studying the concept of lean and TOC makes you localize areas of improvement with the help of their basic philosophy. The parts that are in production that should be taken into consideration are transitions, waste and limitations. These three factors affect the process negatively even if they are not localized and streamlined or eliminated. The method you should use will vary from case to case and it is important that you find a method that works well for one's own process. The first thing you should always do is to be well prepared and be clear about what you want the method to contribute with. The methods of this study has been reviewed and concluded that: 5S, JIT, SMED and TOC's doctrine of bottlenecks and leans doctrine of wastes will work. All these practices help with ways for locating areas of improvement.
20 January 2005
21 November 2011
The simulation as a stand alone optimization tool of a complex system such as a vertical integrated mining operation, significantly over simplifies the actual picture of the system processes involved resulting in an unaccountable effort and resources being spent on optimizing Non Value Added (NA) processes. This study purposed to develop a discrete stochastic simulation-optimization model to accurately capture the dynamics of the system and to provide a structured way to optimize the Value Added (VA) processes. The mine operation model to be simulated for this study is designed as a hybrid level throughput model to identify the VA processes in a mining operation. This study also allows a better understanding of the impact of variation on the likelihood of achieving any given overall result. The proposed discrete stochastic simulation- optimization model provides the ability for a process manager to gain realistic understanding of what a process can do if some factors constraining the process were to be optimized i.e. to conduct what-if analysis. Another benefit of this approached technique is to be able to estimate dependable and reasonable returns on a large optimization related expenditure. The inputs into the model are the capability of the processes which are entered using various variables depending on how much information is available; simple inputs for least amount of information to detailed inputs for well known process to combinational inputs for somewhere in between. The process bottlenecks are identified and measured using the outputs of the model which include production output, severity of constraints, capacity constraints and cumulative bottleneck plots. Once a base case has been identified and documented then the inputs can be modified to represent the business initiatives and the outputs can be compared to the base case to evaluate the true value of the initiative.
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