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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Management Science Review
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Journal DOI :
The Korean Operations and Management Science Society
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Volume & Issues
Volume 16, Issue 2 - Nov 1999
Volume 16, Issue 1 - May 1999
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Efficient Implementation Techniques the Dual Simplex Method
Korean Management Science Review, volume 16, issue 1, 1999, Pages 1~9
The purpose of this paper is to develope efficient techniques for implementing the dual simplex method. In this paper we proposed one artificial row technique to get an initial dual feasible basic solution, a dual steepest-edge method coupled with a dropping row selection rule, and an anti-degeneracy technique which resembles the EXPAND procedure for the primal simplex method. The efficiency of the above techniques is shown by experiments. Finally, the dual simplex method is shown to be superior to the primal simplex method when it is used in the integer programming.
An Application of the Analytic Hierarchy Process in Selecting Strategic Industry in Pusan
Korean Management Science Review, volume 16, issue 1, 1999, Pages 11~23
AHP is a well-known multiattribute decision technique that has been applied to private and public areas. It is well suited to group decision making and offers many benefits as a synthesizing mechanism in group decisions. This paper explains why the AHP is well-suited to group decision making by means of the case study. Through this case study, this paper tried setting priorities for the strategic industry with the focus on the small and medium industry in Pusan.
End-To-End QoS Performance Analysis of the ATM Network
Korean Management Science Review, volume 16, issue 1, 1999, Pages 25~38
Power Control Based Call Admission Control Method of the CDMA PCS System
Korean Management Science Review, volume 16, issue 1, 1999, Pages 39~50
This paper proposes a new call admission control method to enhance the reverse link capacity of a cell with heavy traffic in the CDMA PCS system under the uneven traffic load between cells. Since the capacity of a cell in the CDMA system is restricted by the total interference caused by terminals in the own cell and the adjacent cells, we can enhance the capacity of a cell by reducing the interference from other cells if possible. Our power control method allows that the signal powers received in base stations with heavy traffic be larger than those received in base stations with light traffic in order to make the interference due to other cells in the cells with heavy traffic relatively small. In the previous study, it was assumed that the signal power received by each base station in the CDMA PCS system is same when the call admission control algorithm is implemented. We could show that the reverse link capacity of a cell in the CDMA PCS system can be increased about 20% under our call admission control method.
Development and Application of a Decision Support System for the Oil Pipeline Transportation and Storage Rates
Korean Management Science Review, volume 16, issue 1, 1999, Pages 51~61
Pipeline is an important transportation mode for ail products. The popeline transportation and storage rates affect the popeline usage, and the popeline usage also affects the transportation revenue and operating costs of the popeline. The purpose of our study is to develop a decision support system simulating popeline transportation and storage rates for maximizing the utilization and profitability of the oil pipeline and apply it to the real situation. To do this, a simulation model to help the decision maker decide the rates of the oil pipeline is first proposed. Second, a simulation program is developed, which enables the user to evaluate the various scenarios of oil transportation and storage rates. Finally, this program is applied to the case study of oil industry in korea.
R&D Investment Model for the Information and Telecommunications Technology by Multiple Objective Linear Programming
Korean Management Science Review, volume 16, issue 1, 1999, Pages 63~74
This paper presents a R&D investment model for the Information and telecommunications(l&T) technology using multiple objective linear programming(MOLP). The MOLP model involves the simultaneous maximization of three linear objective functions associated with three criteria, which are social, technological, and economic criterion. This model is different from the traditional one which only involves the maximization of economic criterion. It yields a suitable R&D investment ratio to each technology field. Its application to the National R&D Project in l&t Industry is also presented. In this application, the Analytic Hierarchy Process(AHP) is proposed to estimate the weights, which used as the coefficients in each objective function of the MOLP model. Then the problem is solved using the interactive method STEM. It is showed that with the aid of STEM, the MOLP model can be useful decision aid in formulation R&D investment plan in l&t industry. It is expected that the MOLP model works as the basis for planning R&D investment strategy in l&T industry.
Development of an Analytic Hierarchy Process Model for the Bidder Selection of a Large Construction Project
Korean Management Science Review, volume 16, issue 1, 1999, Pages 75~85
In recent, an unfaithful construction bring about many social problems. The bidding process considering bidding price firstly is one of the reasons raising an unfaithfull construction work. Thus, we should consider many other criteria including bidding price in the bidder selection process. This paper suggests an analytic hierarchy process(AHP) model for selecting the best bidder of a large construction project. A questionnaire was used to obtain domain experts' opinion about criteria to be considered in the bidding process. A hierarchical structure of the AHP model is formed using criteria obtained in the survey. The model consists of bidding price, construction capability, financial status, faith, and their 17 sub-attributes. The relative importance of bidders are judged by pairwise comparison or absolute measurement. An illustrative example is given to show the process selecting the best bidder using the suggested AHP model.
A Study on the Standard Sizes Selection Method for Combat Fatiques Using a Clustering Algorithm of Neural Networks
Korean Management Science Review, volume 16, issue 1, 1999, Pages 89~99
Combat fatigues are issued to military personnel with ready made clothes. Ready made combat fatigues should be fitted to various bodies of military personnel within given standard size. This paper develops a standard sizes selection method in order to increase the coverage rate and fitness for combat fatigues. The method utilizes a generalized learning vector quantization(GLVQ) algorithm that is one of cluster algorithm in neural networks techniques. The GLVQ moves the standard sizes from initial arbitrary sizes to next sizes in order to increase more coverage rate and fitness. Finally, when it cannot increase those, algorithm is terminated. The results of this method show more coverage rate and fitness than those of the other methods
Discontinuity of Representativeness Heuristic
Korean Management Science Review, volume 16, issue 1, 1999, Pages 101~113
The individual behavior on considering prior information when one assesses the probability of uncertain event by representativeness heuristic has been investigated. While prior researches proposed two contrasting behaviors on the employment, we tested the mixed hypothesis that individual ignores the prior information to some extents and begins to consider it above certain threshold when the evidence of representativeness is not salient. The threshold effect of prior probability is positively experimented and the results strongly support the discontinuity hypothesis of representativeness heuristic.
A Study on Supplier Relations, Asset Specificity and Suppliers' Performance in the Korean Auto Industry
Korean Management Science Review, volume 16, issue 1, 1999, Pages 115~135
In many industries, competitive advantage is rapidly shifting to the management of suppliers. Especially, in the automotive industry, suppliers' manufacturing performance influences the quality of automobiles which are assembled by motor companies. This study seeks to identify dominant types of supplier relations and to Examine suppliers' performance difference according to types of supplier relations. The findings indicate that the supplier's production performance in the cooperative relationship is higher than that of the suppliers in the other relationships . And then this study examines the relationships between interfirm asset specificity and suppliers' performance. The findings indicate that the greater the interfirm human asset cospecialization and physical asset specialization, the higher the supplier's market and production performance.
A Study on Flexibility Strategy, Manufacturing Methods and Performance Measurement of Korean Manufacturing Companies
Korean Management Science Review, volume 16, issue 1, 1999, Pages 137~156
Flexibility is a competitive weapon in the changing environment. In order to pursue the flexibility, Korean manufacturing companies must define the flexibility dimension clearly, build the appropriate manufacturing infrastructures and measure the right flexibility performance indicators. This paper found out as follows. First, Korean manufacturing companies' flexibility strategy groups were formed three types. They are flexibility superior group, middle flexibility group and flexibility inferior group. Second, when different types of flexibility strategy group measured their performances, the degree of importance of flexibility performance indicators were different among groups. Third, when different types of flexibility strategy group were pursued, the different manufacturing methods such as product/process design technology, analysis technology, production system management technology and non technological factors were used. Lastly, when different types of flexibility strategy group were pursued, the actual flexibility performances were different among groups.
A Manufacturing Cell Formantion Algorithm Using Neural Networks
Korean Management Science Review, volume 16, issue 1, 1999, Pages 157~171
In a increasingly competitive marketplace, the manufacturing companies have no choice but looking for ways to improve productivity to sustain their competitiveness and survive in the industry. Recently cellular manufacturing has been under discussion as an option to be easily implemented without burdensome capital investment. The objective of cellular manufacturing is to realize many aspects of efficiencies associated with mass production in the less repetitive job-shop production systems. The very first step for cellular manufacturing is to group the sets of parts having similar processing requirements into part families, and the equipment needed to process a particular part family into machine cells. The underlying problem to determine the part and machine assignments to each manufacturing cell is called the cell formation. The purpose of this study is to develop a clustering algorithm based on the neural network approach which overcomes the drawbacks of ART1 algorithm for cell formation problems. In this paper, a generalized learning vector quantization(GLVQ) algorithm was devised in order to transform a 0/1 part-machine assignment matrix into the matrix with diagonal blocks in such a way to increase clustering performance. Furthermore, an assignment problem model and a rearrangement procedure has been embedded to increase efficiency. The performance of the proposed algorithm has been evaluated using data sets adopted by prior studies on cell formation. The proposed algorithm dominates almost all the cell formation reported so far, based on the grouping index(
= 0.2). Among 27 cell formation problems investigated, the result by the proposed algorithm was superior in 11, equal 15, and inferior only in 1.
A Study on the Integrated Methodology for Constructing the Cellular Manufacturing System
Korean Management Science Review, volume 16, issue 1, 1999, Pages 173~186
Recently many firms are introducing the cellular manufacturing system(CMS) as a means of achieving manufacturing efficiencies. However, most of the research on CMS was mainly for determining the cell formation problems. Since the goal of the CMS is not only a increase production efficiencies, but also to enhance the competitive stength of a firm, it would be reasonable to assume CMS as a business reengineering module rather than an independent technique. The purpose of this study is to align the CMS with reengineering, to present an integrated methodology for constructing the CMS, and to apply the CMS to a firm and verify it. The paper concludes with a brief description of the lessons learend by the CMS project and the limitations of the research are described
Development of a Multi-Layered Workflow Management System for Product Development Processes
Korean Management Science Review, volume 16, issue 1, 1999, Pages 187~201
In this paper, we propose a multi-layered architecture of workflow management systems based on CORBA (Common Object Request Broker Architecture). The system aims to support product development processes in distributed environment. Many companies have started to adopt workflow management systems to manage and support their business processes. However, there are many problems in direct application of those systems to product development environments. These mainly resulted from the dynamic features of product development processes. It is strongly required to support dynamic processes as well as static and procedural ones in an integrated and consistent manner. To meet these requirements, a basic workflow management system has been developed as the core component of the integrated architecture. This performs the basic functions of workflow management system. Second, a dynamic workflow management system based on a bidding mechanism has been developed to manage processes that cannot be easily defined or are likely to be modified, Finally, an SGML workflow management system, which is the third layer in the architecture, has been developed to manage documents processing workflows by integration SGML documents contents and process information into the structured SGML document
A Study on SI Project Environment and Risk Management Practice
Korean Management Science Review, volume 16, issue 1, 1999, Pages 203~218
This study presents a diagnosis of SI project environment and risk management practices in Korea. In particular, the stability of project environment, required skills for project managers, risk factors and usefulness of risk management activities are surveyed and analysed. Factor analysis and correlation analysis are performed to investigate any significant relationships among various risk management factors. The results indicate that SI project environment is not stable in Korea, and risk management can be a primary project management tool to deal with the situation. The results also that there's little significant difference in understanding not only between the clients and developers, but alto between the experienced managers and less experienced managers.