Abstract Construction is an industry that manages various types of construction, including building, extending, remodeling, reconstructing, and demolishing buildings. There are two major types of construction business: One is public construction, and the other is commercial construction, totaled 391 million dollars. Due to the recession of real estate in recent five years, the demand of the private sector decreases dramatically, which leads to the chain reaction of overall sales decreasing in construction industry in Taiwan. However, the industry still has 255 billions of sales revenues generated from government projects each year as well as hundreds of billion dollars of revenues from high-speed railroad and Kaohsiung subway BOT project. As long as the gross profit reaches 500 million dollars, the profit margin will be above 10 percent. The major source of revenues for a construction company is done through bidding. There is only one winner in the bid. Therefore, to research and evaluate relative performance of each construction company in the bid is an important task. The purpose of this thesis is to evaluation the performance of 12 public construction companies using DEA analysis. The evaluation will focus on areas of liquidity ratios, debt and asset management ratios, profitability ratios, and overall performance of efficiency. Major conclusions from the study are as following: 1. Four financial ratios and overall performance of efficiency were derived from DEA analysis, which eliminate inconsistencies of ratio analysis to make evaluation results more relevant. 2. Among the evaluation criteria, including liquidity, debt and asset management, profitability ratios, evaluations of profitability ratios among firms has the biggest inconsistency, followed by asset management. 3. From the sensitivity analysis, we conclude that companies with stable degrees of efficiency, which means efficiency degrees with small variance, have relatively higher profitability. This indicates the management needs to enhance the overall performance in order to enjoy ample profit. 4. From the study of DEA, we find that DEA analysis pinpoint the slack of each variable to enable decision-makers to see clearly which variables (input or output) need to be increased or decreased. This helps them to plan for the companies¡¦ overall efficiency to be at peak. DEA analysis provides decision-makers insights by relatively comparing the differentiation of statistics. This enables them to make executable strategies. Results of examples in this thesis prove efficiencies for evaluation. The convenience of ratio analysis and the complete perspective offered by DEA analysis are two best advantages of these two evaluation methods.

Facing the advent of knowledge economy in the 21st century, the competitive advantages for enterprises have been transformed from physical land, capital and labor to invisible knowledge. Knowledge has become the most important assets for business. Thus, knowledge management is the most important issue in the age of knowledge economy for enterprises. TPM (Total Productive Maintenance) is based on Preventive Maintenance (PM) system from U.S. PM was first introduced to Japan in 1950s to 1960s, and then transformed to TPM by being added with local notions and concepts. JIPM (Japan Institute of Plant Maintenance) started to promote TPM in Japan since 1971. After TPM was introduced to Taiwan in 1994, it¡¦s been remarkably aware that TPM improved enterprise effectiveness and strengthened the competitive advantages of business as a result of implementation by the enterprises. Employees created amounts of knowledge to solve problems after the enterprise adopted TPM. It helps employees to improve the performance on their jobs. It seems that knowledge management activities are embedded in TPM but has not be evoked enough attention. This research explores the relationships between TPM and knowledge management activities by case study method. The findings present a result that the generation of knowledge is more obvious in TPM, but the repository of knowledge is needed to improve compared with processes of knowledge management activity. The research result may help to provide a concept as a reference for enterprises.

The purpose of this study was to investigate the quality of frying oil in eight randomly selected restaurants in Umeå. A further aim was to examine the techniques and control methods the various restaurants used. The methods used to answer the purpose was questionnaires, answered by the chefs, which was used to examine the procedures used in the handling of frying oils. To investigate the quality of the frying oils two types of quick tests were used, a Oxifrit-test and a TPM-test. The results showed that all food businesses had developed procedures for the handling of frying oils. Procedures for intermittent usage, change of frying oil, monitoring of the oil, cleaning and handling of frying oils after use existed at the eight restaurants. According to the recommendations of the Deutsche Gesellschaft für fettwissenschaft the observed routines does not meet all the criteria to achieve a good quality of frying oil, and therefore needs improvements. However the Oxifrit-test and TPM-test showed that the frying oils generally archive a good quality in the selected restaurants. There were only three restaurants where the oil should have been replaced. Further improvement of procedures might help to improve the quality of frying oil.

Submitted by Victor Hugo Albuquerque Rizzo (victor.rizzo@ufpe.br) on 2015-04-14T15:04:43Z No. of bitstreams: 2 DISSERTAÇÃO José Bonifácio Morais Marinheiro.pdf: 9551784 bytes, checksum: d78c4b65d762e687683f71e383144216 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-04-14T15:04:43Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO José Bonifácio Morais Marinheiro.pdf: 9551784 bytes, checksum: d78c4b65d762e687683f71e383144216 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013 / A Manutenção Produtiva Total (TPM) e a produtividade são os assuntos que compõem o tema desta dissertação. A TPM é uma metodologia que tem como objetivo a perda zero e a melhoria da produtividade na indústria. O estudo da produtividade tem características complexas e precisa ser bem focalizado para viabilizar análises objetivas. Por conta disso a investigação restringiu-se à produtividade física. Classificado como pesquisa descritivo-quantitativa, o presente trabalho utilizou o estudo de caso como técnica de pesquisa e foi realizado numa indústria de embalagens localizada no estado de Pernambuco, que recebeu o codinome de Embala S.A. Na empresa, o estudo abrangeu as três máquinas piloto na implementação da TPM, tendo focado em duas, a KS1 e a PT2. Buscando identificar a influência da TPM sobre a produtividade física da empresa, o estudo investigou se a implementação da TPM, ainda que restrita a apenas os pilares MA, MP, MF e ET, quatro dos cinco pilares fundamentais da metodologia, seria suficiente para influenciar positivamente a produtividade física da empresa. Da pesquisa empírica foram obtidos os dados para se analisar a evolução do OEE nos equipamentos estudados, bem como as evoluções de volumes produzidos, tempos de carga e, finalmente, da produtividade física. Por sua vez, a produtividade física foi obtida em termos de quilogramas por hora-máquina, detalhe que a caracteriza como uma produtividade parcial. Como resultado da análise realizada, foi possível concluir que a TPM tem influenciado de forma positiva na produtividade física da empresa estudada, a qual, ao final período estudado, na média, obteve maiores volumes produzidos com menores quantidades de horas-máquina.

Master of Science

El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / The industrial chemical sector has grown during the last years in the Peruvian market, becoming highly competitive since it represents the second main activity in the manufacturing industry. However, companies belonging to the sector have experienced a decrease in productivity, since it has a lower production rate than other economic sectors. This paper presents a model for increasing the productivity of companies in the sector. For this, the 5S and TPM techniques will be used sequentially. First, 5S techniques are applied to reorder the working area and to create a clean and safe environment for operating personnel. Then, the TPM technique is used to focus on reducing the deficiencies that machines present through preventive maintenance and raise awareness and involve operational personnel in the daily activities of autonomous maintenance. For validation of the model, a simulation with the software Arena is performed. Results show an increase of about 15% in productivity, the cycle time reduces by 14%, the OEE will increase by 24% and daily production by 15% in the paint line.

The current demand of the plastic sector has been increasing, managing to exceed the productivity of SMEs in developing countries such as Peru. Within this framework, the demand is greater than the supply due to the low production of the companies, which present a high index of hours due to lack of maintenance of the machines. The purpose of solving the main problem is to reduce the hours of low productivity that represent a great monetary loss for the company. That is why, by implementing this maintenance management model that is based on Lean Manufacturing, it will allow for a broad competitive advantage in the sector. This model was validated by implementing the TPM and SMED tools of the Lean Manufacturing philosophy within the plastics plant, achieving results that determine the degree of improvement of productivity in the company. Finally, after having validated the model, it is concluded that it could increase the capacity used by the company by 20% with the reduction of the changes.

Numerous organizations have pressed in the past several years for improved security and privacy in online interactions. Stakeholders have encouraged the adoption of privacy-enhancing technologies, utilization of microcontrollers and hardware devices for key storage and attestation, and improvements to the methods and policies used for authentication. Cryptographers and security engineers have responded to these calls. There have been numerous papers published in the last decade on topics such as private information retrieval and anonymous authentication and the Trusted Computing Group (TCG) has released a version 2.0 standard for Trusted Platform Modules (TPM). Adoption and implementation of these techniques, however, has been lacking. Although the TPM 2.0 specification was released in 2014 there are no reference implementations of direct anonymous attestation algorithms compatible with the hardware. The purpose of this work is to implement and discuss the implementation of direct anonymous attestation on TPM 2.0 and to consider the scalability and performance of direct anonymous attestation schemes operating on real-world TPM devices. / Master of Science

Denna magisteruppsats har genomförts vid Spaljisten AB och behandlar produktionsfilosofin Lean-produktion och produktionskonceptet TPM. Huvudobjektet för studierna var en maskinlinje för sågning, kantlistning, fräsning och borrning av planmöbeldetaljer (Homag VI). En nulägesanalys genomfördes för att kartlägga stopporsaker och OEE-talet (35,9 %). Inom samtliga klasser av stopptider är det framförallt kortvariga avbrott (81 %), vilket tyder på kroniska fel i linjen. Tillsammans med maskinlinjens personal genomfördes en störningsanalys (Ishikawadiagram). Nulägesanalys och störningsanalys visar på en förbättringspotential av 33 % för ökad tillgänglighet. Vidare genomfördes en SMED-analys där själva analysarbetet genomfördes tillsammans med personalen av maskinlinjen. Vid en närmare analys kunde det föreslås en klassificering av IED respektive OED samt förenklingar som innebär en minskning av tidsåtgången med 55 min. och 43 sek för omställningen. Utöver detta studerades bland annat verktyg som Lean-uppstart och kommunikation, operatörsunderhåll, 5S och ständiga förbättringar. Det genomfördes en effektivitetsanalys av förbättringsgruppenverksamheten. Vid den sistnämnda analysen konstaterades motivationsproblem hos personalen, som har sin huvudförklaring i ett saknande av en organisatorisk plan och en planering för införandet av nya produktionsformer. Uppsatsen rymmer en utförlig sammanfattning på svenska, engelska och tyska. / The master thesis has been realized in direct contact with the host company Spaljisten AB, Åseda Sweden and is dealing with the production philosophy Lean production and the production concept TPM. Main object for the studies was a machine line for processing of furniture details (Homag VI). An actual condition analysis has been done to determinate stop reasons and the OEE (35.9 %). In all classes of stop reasons occur mainly short stops (81 %) those indicate chronic problems in the line. Together with the employees of the line Homag VI was a fault analysis done (Ishikawa diagram). Actual condition analysis and fault analysis can generate a potential of improvement of 33 % for increased availability. Furthermore was a SMED analysis done where the main work of analyzing was done together with the employees of the line. By a deeper analysis a classification of IED and OED respectively could be done including even simplifications that led to a reducing of time for set up of 55 minutes and 43 seconds. Also tools like the Lean start up and communication, operator’s maintenance, 5S, constant improvements have been studied. An efficiency analysis of the kaizen groups was done that shows that a lack of motivation exists among the employees. The main explanation for this is that the company does not have a plan for the organisation structure and neither a plan for implementation of new production forms. The work contains an extended summary in English, German and Swedish.

<p>Denna magisteruppsats har genomförts vid Spaljisten AB och behandlar produktionsfilosofin Lean-produktion</p><p>och produktionskonceptet TPM. Huvudobjektet för studierna var en maskinlinje för sågning, kantlistning, fräsning</p><p>och borrning av planmöbeldetaljer (Homag VI). En nulägesanalys genomfördes för att kartlägga stopporsaker</p><p>och OEE-talet (35,9 %). Inom samtliga klasser av stopptider är det framförallt kortvariga avbrott (81 %), vilket</p><p>tyder på kroniska fel i linjen. Tillsammans med maskinlinjens personal genomfördes en störningsanalys</p><p>(Ishikawadiagram). Nulägesanalys och störningsanalys visar på en förbättringspotential av 33 % för ökad</p><p>tillgänglighet. Vidare genomfördes en SMED-analys där själva analysarbetet genomfördes tillsammans med</p><p>personalen av maskinlinjen. Vid en närmare analys kunde det föreslås en klassificering av IED respektive OED</p><p>samt förenklingar som innebär en minskning av tidsåtgången med 55 min. och 43 sek för omställningen. Utöver</p><p>detta studerades bland annat verktyg som Lean-uppstart och kommunikation, operatörsunderhåll, 5S och</p><p>ständiga förbättringar. Det genomfördes en effektivitetsanalys av förbättringsgruppenverksamheten. Vid den</p><p>sistnämnda analysen konstaterades motivationsproblem hos personalen, som har sin huvudförklaring i ett</p><p>saknande av en organisatorisk plan och en planering för införandet av nya produktionsformer. Uppsatsen</p><p>rymmer en utförlig sammanfattning på svenska, engelska och tyska.</p> / <p>The master thesis has been realized in direct contact with the host company Spaljisten AB, Åseda Sweden and</p><p>is dealing with the production philosophy Lean production and the production concept TPM. Main object for the</p><p>studies was a machine line for processing of furniture details (Homag VI). An actual condition analysis has been</p><p>done to determinate stop reasons and the OEE (35.9 %). In all classes of stop reasons occur mainly short stops</p><p>(81 %) those indicate chronic problems in the line. Together with the employees of the line Homag VI was a fault</p><p>analysis done (Ishikawa diagram). Actual condition analysis and fault analysis can generate a potential of</p><p>improvement of 33 % for increased availability. Furthermore was a SMED analysis done where the main work of</p><p>analyzing was done together with the employees of the line. By a deeper analysis a classification of IED and</p><p>OED respectively could be done including even simplifications that led to a reducing of time for set up of 55</p><p>minutes and 43 seconds. Also tools like the Lean start up and communication, operator’s maintenance, 5S,</p><p>constant improvements have been studied. An efficiency analysis of the kaizen groups was done that shows that</p><p>a lack of motivation exists among the employees. The main explanation for this is that the company does not</p><p>have a plan for the organisation structure and neither a plan for implementation of new production forms. The</p><p>work contains an extended summary in English, German and Swedish.</p>