Data mining technique is the exploration and analysis, by automatic or semiautomatic means, of large quantities of data in order to discover meaningful patterns and rules. This paper uses a data mining technique for the prediction of defect types in manufacturing process. The purpose of this paper is to model the recognition of defect type patterns and prediction of each defect type before it occurs in manufacturing process. The proposed model consists of data handling, defect type analysis, and defect type prediction stages. The performance measurement shows that it is higher in prediction accuracy than logistic regression model.
More and more countries are pursuing the improvement of their companies international competitiveness, quality improvement and increase of productivity by adopting the technology and management standards for information and communications industry as a national standard. This trend based on international standards contributes to promotion of international trade in information and telecommunication industry. Thus, the products of the companies which dont select and comply with the adequate standards are hard to obtain confidence and the companies are losing the opportunities to compete in the market. As information and communication industry becomes more complicated and its competition environment changes rapidly, the market requires more reliable products than ever and management of the entire lifecycle from development of software to its disuse. Besides, the service quality improvement of suppliers and rapid and clear communication between suppliers and customers are also required. The purpose of this study is to clearly understand the theoretical details of TL 9000 by researching the literatures and materials on TL 9000. Also, the paper studies the status of QMS building based on TL 9000 by researching and analyzing the positive cases of QMS established by companies on the basis of TL 9000 standards.
This study aims to examine the relationships between total quality management(TQM) practices and operational performance perceived by employees who are in different organization types, R&D organization and Non-R&D organization in manufacturing companies. Operational performance is defined as the degree of operation efficiency in the perspective of quality, delivery, and cost. Our study showed that the degree of TQM practice has significant difference in organization type. In case of R&D organization, the categories of customer focus and process management were the strongest significant predictors of operational performance. Therefore, the optimal TQM practices for R&D organization can be obtained in consideration of customer focus and process management.
According to increasing extended use of ERP from intranet to extranet environment, from enterprise internal use to suppliers and business partners and from wired to wireless devices, it became very important to authenticate proper user allow to access proper application module and database, not only to protect enterprise information asset but also keep data integrity. In this document, we introduce the technologies of privilige management infrastructure, role based access control and the building of privilige management system for ERP implementation regarding this point of view.
Presented in this paper is an algorithm to compute a Voronoi diagram of circles in a circle, where circles are located in a large circle. Given circles in a large circle, the region in the plane is divided into regions associated with the given circles. The proposed algorithm uses point Voronoi diagram, and then some topological remedies are applied so that we obtain proper initial topology including enclosing circle. From this initial topology, we can obtain the correct topology by a series of edge-flip operations. After getting the correct topology, the equations of edges are computed and represented in a rational quadratic Bézier curve form.
We propose a new algorithm for a classical problem in the planer computational geometry: computing a shortest path between two points in the presence of circular obstacles. Proposed algorithm actually computes a path tree that encodes a shortest path between given two points. Types of path are defined as a tangent line segment between circles, between point and circle, or as an arc. Using circle set voronoi diagram, geometric information that is very useful to search circles is obtained. The key of proposed algorithm is the reduction of the number of circles to need for constructing path tree. The main advantages of our algorithm are its robustness, speed, and the simplicity in implementation.
The problems of various research fields such as molecular modeling may be represented as circles with inclusion relations. Given n circles in the plane, the recognition of inclusion relations for a set of circles can be a tool to reason about geometric problems on 2D. In this paper, we introduce O(nlogn) algorithm to find these relations for the circles and this algorithm make possible maintaining the geometric data hierarchy in the geometric data processing aspect.
Since transmitting various files around Internet is one of common activities in everyday life, the compression is important technical issue in these days. Shape models are also frequently transmitted and therefore its compression has also been studied. Considering the large portion of shape model can be normal vectors, a new scheme was recently presented to compress normal vectors using clustering and mixed indexing scheme. Presented in this paper is a mathematical investigation of the scheme to analyze the probability distribution of normal index distances in Normal Index array which is critical for the compression. The probability distribution is formulated so that the values can be easily calculated once the relative probabilities of C, R, E, S, and L op-codes in Edgebreaker are known. It can be shown that the distribution of index distances can be easily transformed into a few measures for the compression performance of the proposed algorithm.
STEP is the international standard for the computer-interpretable representation and exchange of product data. STEP physical file as the implementation method of STEP generally has a large file size which may be an obstacle of efficient use and seamless transition through network. Therefore, the compression of STEP physical file has been interested recently. In this paper, we present the compression algorithm of STEP physical file. STEP physical file is compressed by LZ77 with an appropriate search buffer size for STEP physical file and Huffman coding is applied to the result of LZ77. The proposed algorithm obtains the significant compression ratio.
This research is devoted to develop and evaluate the alternative plans of the Plants Within Plants (PWP) case for improving productivity. Three alternative plans were made for the productivity improvement of the existing system of the case. The first plan was designed on the base of reducing work stations and reducing balance delay. The second plan has used the group working concept. The third plan has also applied the group working with the allowance time for compensating workers movements. The computer simulation method has been used for comparing and evaluating the existing system with three alternative plans. The simulation results have shown that the second one is superior to the other three lines in terms of low Work-In-Process(WIP) level and the high production output. The third plan has also shown the higher production output and lower WIP level than the existing one. In conclusion, applying group working concept to the PWP production environment could be the solution for increasing productivity.
The purpose of a man-machine chart is improved utilization of a man or a machine. Improved utilization can mean less idle time, rebalanced idle time, or less idle time of an excessive component. In this study we improved the productivity of the assembly line in the electronics company using man-machine chart. The results are applicable for improving the effectiveness of line balancing problems in the electronics industry.
This paper deals with the sequencing problem in the operation of the manufacturing systems with the constraint of buffer capacity. Some of studies for this theme have been progressed for several years. And then most of them consiedred only one objective, such as maximum lateness, machine utilization, makespan, mean flowtime and so on. This study deal with two objectives of the delivery for customers and the idle time of machines for producers. For the decision of sequence, the utility function is used. The developed heuristic algorithm presents a good solution. Through a numerical example, the procedures of the job sequencing is explained.
With increasing of Korean family's revenue and pursuing quality of life, outdoor food and meal industry is rapidly growing up. Thus employee's service quality is much more needed in this industry. This paper is review the relationship between transformational leadership and service quality. Survey papers gathered from restaurant employee were 571 cases and analysed to test significant relationship between leadership and service quality. Statistical analysis result showed that tangibility and empathy among service quality factors have many significant relationships with leadership styles than other factors.
미국의 실리콘밸리와 대만의 신주공업단지는 종종 첨단 산업집적단지의 성공적 모델로 불리어진다. 이들 두 지역의 성공 및 경쟁력에 대한 지배적 설명은 전통적으로 경제활동의 공간적 집적이 가져다주는 경제적 이익을 제시하기 위해 사용된 “외부규모의 경제”에 이론적 기반을 두고 있다. 그러나, 외부경제란 개념만으로 이들 지역의 역동적 발전과 모방하기 힘든 경쟁력을 설명하기에는 부족함이 많았다. 본 논문은 이들 지역에서 역사적으로 전개되어진 기업과 외부 경제주체들과의 관계를 사회적 자본, 네트워크 기반 산업시스템분석, 자원기반이론 등을 토대로 분석하여 이들 두 지역이 첨단집적단지로서의 성공요인과 경쟁우위에 대해서 살펴보고자 했다. 아울러 본 논문은 이들 두 지역에 있어서 발전적 협력관계를 분석함으로서 국내에서 이러한 첨단산업단지를 개발하고 발전시키기 위해 필요한 것이 무엇인지를 검토하고 이에 필요한 정책적 시사점을 몇 가지 제시했다.