Dissertations / Theses on the topic 'EQUIPMENT OPERATION EFFICIENCY'

Thesis: M. Eng. in Manufacturing, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 59-60).<br>This thesis deals with improving the operational efficiency of automated part storage devices, in this case Vertical Lift Modules (VLM). This was accomplished by using dynamic slotting to maximize and maintain high material throughput, eliminating the need for periodic reslotting. Multiple VLMs can be used in parallel picking operations to improve material throughput. Common industry practice is to periodically reslot items once an unbalanced workload is obvious. This thesis investigates a method to avoid periodic reslotting by using incoming parts as a means to maintain a balanced workload amongst VLMs. Three different part allocation strategies are compared, namely Randomization, Snake and Order Grouping to determine their effectiveness and respective feasibility. The three strategies are then crafted into logical systems that could be used to strategically place received parts and eliminate the need for periodic reslotting. The Snake method was found to be the most well suited for this particular situation due to the small order sizes. This method provides a 35% savings in pick time, which is equivalent to approximately 733 hours annually.<br>by Stephen Douglas Racca.<br>M. Eng. in Manufacturing

The main current challenges of the mining industry include aspects such leveraging the mine productivity, controlling costs and reducing environmental impacts. In most surface mining operations, overburden removal requires haulage over short distances. A comparison of different haulage options for short distances with respect to energy efficiency in open-pit mining is a key aspect for decision making, but only a limited number of recent research efforts have considered energy efficiency as a control variable in mining projects. Loading and haulage have an energy source that is highly dependent on fossil fuels. In addition, the equipment involved in these operations use tyres as an important input. There are many studies relating the fuel consumption and tyre wear to several performance indicators, but a methodology that identifies and prioritizes higher-impact variables under each specific operating condition is not available. This research proposes new methods using alternative equipment simulations for fuel consumption and tyre wear management. Such methods include multiple regression analysis, stochastic simulation and specialized software routines in order to identify and control operational performance variables related to diesel consumption, tyre wear and selection of new alternatives equipments. Considering alternative scenarios of equipment models, the results of the proposed method include a 14% reduction in specific fuel consumption and a 16% increase in productivity. Regarding the fuel management method, the reduction of diesel consumption reached 10%. For the tyre wear management method, the results indicated a potential to save up to 8.9 t of tyre rubber in only one quarter.<br>Na atualidade, a indústria de mineração possui como principal desafio alavancar sua produtividade, controlar custos e reduzir impactos ambientais. Muitas operações de mineração exigem transporte em pequenas distâncias. A comparação de diferentes opções de transporte em distâncias curtas considerando a eficiência energética é uma necessidade de operações de lavra a céu aberto, mas existem poucos estudos recentes que priorizam esta variável em projetos de mineração. As operações de carga e transporte são amplamente dependentes de combustíveis fósseis. Essas operações também necessitam de pneus como um importante insumo. Existem alguns trabalhos que relacionam o consumo de combustíveis e o desgaste dos pneus a variáveis operacionais, mas uma metodologia que identifique as variáveis de maior impacto frente a condições específicas ainda não está disponível. O presente trabalho fornece novos métodos de simulação para equipamentos alternativos, consumo de combustíveis e gestão do desgaste de pneus. Análises de regressão linear múltipla, simulações e ferramentas de desenho de mina permitem identificar e controlar variáveis ligadas ao consumo de combustíveis, desgaste de pneus e seleção de equipamentos. Os estudos envolvendo equipamentos alternativos alcançaram uma redução de 14% no consumo de diesel e um aumento de 16% na produtividade. Com relação às técnicas de gestão do consumo de combustível aplicada aos caminhões observou-se uma redução de 10%. Considerando o sistema de gestão de desgaste de pneus, a aplicação do método proposto possui um potencial de evitar o descarte de 8,9 t de borracha para pneus em apenas um trimestre.

碩士<br>銘傳大學<br>國際企業學系碩士班<br>96<br>With changing of National Health Insurance Program system, it decreases the member of hospitals every year. This study applies the Data Envelopment Analysis（DEA）model to evaluate the efficiency of seventy-five hospitals of Taiwan from 2002 to 2006. The Tobit regression model is used in which the DEA-estimated efficiency value is the dependent variable and high tech medical equipment、ownership and quality are independent variables. The results of this study：In ownership, efficiency of private hospital is better than efficiency of public hospital. And efficiency of teaching hospital is the best. The result of Tobit regression：Increasing the number of high tech medical equipment significantly improves a hospital''s efficiency. The occupancy rate、ownership、scale、quality have a positive impact on hospital efficiency performance.

碩士<br>國立交通大學<br>管理學院運輸物流學程<br>105<br>This study employed the material handling facilities in a TFT-LCD factory as a case study. We screened the set of critical parts for the material handling system from the historical data from the procurement and maintenance logs. Then, we conduct fitting analysis on the number of parts used for maintenance, the time between failures of the part to get the probability distribution of failure events for the critical parts. We formulated the corresponding simulation model for the material handling system based on the results of fitting analysis on the part consumption, the time between failures. Then, we used an enumeration approach to test different combinations of inventory levels of spare parts using the simulations, recorded the number of events in which the breakdown of the system lasts more than 8 hours (in short, BMT8). We pick the best combination of inventory levels of spare parts that meets the required conditions BMT8 is no more than 5 times with the minimum inventory holding cost. The framework and results of the proposed system simulation could serve an important support and reference on the decision of inventory levels of spare parts for the case company.

碩士<br>銘傳大學<br>企業管理學系<br>106<br>As the social issues of environmental maintenance and society relationship are given more attention, the government encourages or regulates companies to perform corporate social responsibility (CSR). Meanwhile, many firms takes CSR either as part of operation activities or as part of core strategies for sustainable development. Furthermore, Taiwan Stock Exchange launched the TWSE Corporate Governance 100 Index (CG 100) in 2015 with the goal of encouraging corporations to comply with good governance practices according to the corporate governance evaluation criteria. Through the sample from the listed manufacture of computers and peripheral equipment (MCPE) and the manufacture of other electronic parts and components (MOEPC), this study investigates the relationship between CSR and operation efficiency, and analyzes the impact factors on efficiency. There are 75 firms in the sample with the period during 2013-2016. The methodology and testing methods include data envelopment analysis (DEA), Person correlation coefficients, Tobit regression model, t-test, F-test, and VIF analysis. The result suggests that the four variables of capital size, ratio of stockholding of directors and supervisors, dummy of MCPE versus MOEPC, and dummy of eligibility into CG100 index constituents are the influential factors on efficiency. In addition, the significant and positive value on the dummy of eligibility into CG100 index constituents indicates that the more the firms perform CSR, the more the operation efficiency.

碩士<br>中華大學<br>工業管理學系<br>105<br>To meet the digital age many countries in the world are fully committed to promoting industrial restructuring, the regional economies are strongly support the technology industry, the electronics industry increasingly fierce international competition, the technology companies must improving their operation efficiency and continuous to research and innovation. Since the 1970s Taiwan's technology industry has began to introduce the development of more than 40 years and already establish a solid foundation in the global high-tech industry supply chain. The semiconductor industry is the most important part in Taiwan’s economic development. Recently more and more international competitors join this competition we have to upgrading and development our advance technology the equipment company play an important role which can provide a variety of professional R & D technical support. This research use the DEA method and CCR, BCC model to analyze the Taiwan’s semiconductor equipment company operating efficiency “MIC”,“L&K”, ”UIS” and “WHOLETECH“, based on the financial data from 2010 to 2015. Take the “Fixed Asset”, “Business Cost”, and “Investment Variable” for input variables and the “Business Income” for output variable. According to the CCR model, the overall efficiency of 24 DMUs the “L & K” 2011, “UIS” 2011, “WHOLETECH” 2010,2011,2014,2015 overall efficiency value are 1, and the efficiency is shown to be relatively effective. The pure technical efficiency of 24 DMUs in the efficiency of 1 are “MIC” 2015, “L & K” 2011 and 2015, “UIS” 2011 and 2015, “WHOLETECH” 2010~2015, it’s mean that the annual input factors for the company are efficient operation. The According to the returns to scale “MIC” 2010~2015 are DRS, “L & K” 2010,2011 is CRS other years are DRS, “UIS” 2010,2011 is CRS other years are DRS, “WHOLETECH” 2010,2011, 2015 are CRS other years are IRS.

碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>93<br>With a growth of economic, the request for a higher living quality makes air- conditioning equipments more popular and Taiwan is located at the subtropical zone, the load of air-conditioning become heavier when the summer time because hot and moist air condition. That also makes the energy use ratio of air-conditioning system to whole building is over fifty percent. And we can know that the influence of operating efficiency of air-conditioning equipments on energy saving is great. This research emphasizes on the study of the operating efficiency of air-conditioning equipments and life cycle analysis. There are two parts in the study; the first is to measure efficiency of the chiller、water system、cooling tower and air handling system, find out the method to improve operating efficiency each of this equipments. List methods of maintenance and management of air-conditioning system, can be a reference to the air-conditioning system manager. The secondary is using the concept of life cycle to the evaluation of economic efficiency of air-conditioning system. To consider the influence of initial cost、operating cost、maintenance cost and replacement cost on the total cost. And use regression analysis to find out a formula, to count the increment of operating cost and maintenance cost by decrease of operating efficiency. Finally, we illustrate how to starting life cycle analysis by case study.

碩士<br>佛光大學<br>經濟學系<br>96<br>The WiMAX is a kind of standard of wireless WAN. This new technology considered an important key which would influence development of wireless communication industry in the future. Hence, the government in Taiwan has adopted policy initiative on the WiMAX technology development now. Hope the merchantants of network’s equipment will reform to the OBM mode and catch the business in the global market. This research studies collected the finance data of eighteen equipment manufacturing factories of WiMAX in Taiwan and use DEA methodology to analyze operational efficiency among these factories for the dates of 2004-2006. By the way of efficiency analyzing, this thesis obtained conclusion and suggestion as follows: 1.The efficiency value of industry is gradually increasing. In which, the performance of the BTS equipment of sub-industry was better than the CPE equipment of sub-industry. According to the analysis data, it can provide excellent information and direction to examined units. 2.Owing to the key technology of the equipment manufacture surface in Taiwan still depend on foreign operators. Therefore, in order to attract overseas companies which come to invest or technology cooperate in Taiwan, the government should take some strategies to create a higher quality environment in the future, and encourage all industries developing in technology research. 3.The WiMAX equipment manufacture and system service industry should ponder how to combine the present network system to avoid the investment wasting, and reduce the difficulties on system select for user.

Thesis (M. Sc.)--University of Alberta, 2010.<br>Title from pdf file main screen (viewed on June 22, 2010). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Construction Engineering and Management, Department of Civil and Environmental Engineering, University of Alberta. Includes bibliographical references.