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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Operations Research and Management Science Society
Journal Basic Information
Journal DOI :
The Korean Operations and Management Science Society
Editor in Chief :
Volume & Issues
Volume 29, Issue 4 - Dec 2004
Volume 29, Issue 3 - Sep 2004
Volume 29, Issue 2 - Jun 2004
Volume 29, Issue 1 - Mar 2004
Selecting the target year
An Extension of the Level Crossing Technique
Chae Kyung-Chul ; Yi Xeung-Won ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 1~7
We demonstrate in this paper that the level crossing technique can be applied to such a system that not only the state vector is two-dimensional but Its two components are heterogeneous. As an example system, we use the GI-G/c/K queue whose state vector consists of the number of customers in the system and the total unfinished work.
Comparison of Production and Distribution Policy in the Supply Chain Model Considering Characteristics of the Semiconductor Industry
Chung Sung Uk ; Lee Byung Jin ; Lee Young Hoon ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 9~21
Semiconductor industry is the one whose supply chain network is distributed all over the world. And it has different characteristics with other manufacturing industries as reentrancy, binning, substitution. In this paper, we suggest supply chain models for the semiconductor industry, consisting of production and distribution chains, where manufacturing characteristics are considered. Three policies for the production chain and two policies for the distribution chain are suggested and formulated mathematically. Six combination policies are tested for the evaluation of performances with example. It is shown that the supply chain is operated, if production and distribution are coordinated and managed based on the demand information, without inventory, as efficiently as the chain with inventory.;연구제목 : 신도시 경관계획 기준 마련을 위한 연구 ◦연 구 진 : 양병이(서울대), 최선주(경원대), 이승일(서울시립대) ◦연구종료 : 2004. 10. 31.(예정) ◦연구목적 : 신도시 계획시 활용할 수 있는 경관계획수립 기준을 제시함 ◦기대효과 : 제2기 신도시 뿐 아니라 제3기 신도시, 기업도시 등 건교부의 승인을 득해야 하는 100만평 이상의 택지개발사업의 수행시 적용하며, 향후 경관계획과 관련된 법제도의 정비를 위한 실질적 기반을 제공 * 추계 정기 세미나는 10월 또는 11월에 농촌경관계획을 주제로 개최될 예정입니다. 자세한 사항은 프로그램이 확정된 후 추후에 공고할 예정입니다. * 문의 : 한국조경학회 경관계획연구회 공동회장 김한배 (02-2210-5620/ email@example.com) 한국조경학회 경관계획연구회 총무위원 배정한
An Empirical Analysis on Electronic - Store Success Model
Yoon Cheol-Ho ; Kim Sang-Hoon ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 23~39
This paper focused on empirically testing the ESM(Electronic-Store Success Model). The model was developed by basing upon the ‘Updated D&M(DeLone and McLean) IS Success Model(2003)’ and reflecting the characteristics of marketing and e-business, and composed of the six dimensions including system quality, information quality, service quality, trust, customer loyalty and financial performance. The research model consisting of five dimensions, excluding financial performance, was proposed and empirically verified by structural equation model with respect to data from 224 customers on 69 Electronic-Stores. The results show that system quality and information quality significantly influence service quality, and that service quality also significantly influence trust and customer loyalty, and that trust has significant influence on customer loyalty.
Construction of "CIDEAR" Model for Selecting and Evaluating Cross Impact R & D Projects
Kwon Cheol Shin ; Park Joon Ho ; Hong Seok Ki ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 41~61
The purpose of this paper is to construct
model which evaluates proposed R&D projects considering cross impact among them and selects proper projects to utilize resources efficiently as well as to maximize efficacy of investments. For this purpose,
model is designed as the following six steps.
Decision Theory Evaluation Model
is for setting and selecting the evaluation items according to the structured procedure of evaluation system. The priority of items is decided at
AR Decision Model
Cross Impact Estimation Model
is for computing the final probability of success and the result is used to revise the evaluation results of
Decision Theory Evaluation Model
Resource Performance Analysis Model
classifies the proposed R&D projects on the basis of required resources and expected performance. Consequently, the possibility of bias of project selection can be prevented.
Priority Oder Decision Model
is for computing the efficacy of proposed projects. Finally,
Efficacy-Efficiency Cause Analysis Model
analyzes the structure of efficacy and efficiency of the projects. The major findings and significances of this study are summarized as follows: (1)
model can deal with the affairs of R&D projects having the characteristics of mutual independence as well as mutual dependence in the point of efficacy and efficiency. Hence, it is possible to evaluate and select R&D projects more accurately. (2) It can be possible to raise the possibility of projects success. R&D manager can use the information for project management because the efficacy-efficiency structure of selected projects can be analyzed. (3) We proved the usefulness of the constructed
model using an case about twenty-one R&D projects of a leading company of electronic industry in Korea.
Dynamic Supplier-Managed Inventory Control and the Beneficial Effect of Information Sharing
Kim Eun-gab ; Park Chan-kwon ; Shin Ki-tae ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 63~78
This paper deals with a supplier-managed inventory(SMI) control for a two-echelon supply chain model with a service facility and a single supplier. The service facility is allocated to customers and provides a service using items of inventory that are purchased from the supplier, Assuming that the supplier knows the information of customer queue length as well as inventory position in the service facility at the time when it makes a replenishment decision, we identify an optimal replenishment policy which minimizes the total supply chain costs by reflecting these information into the replenishment decision. Numerical analysis demonstrates that the SMI strategy can be more cost-effective when the information of both customer queue length and inventory position is shared than when the information of inventory position only is shared.
Measuring Efficiency and Productivity of the Korean Public Hospitals
You Taewoo ; Yim Jongeun ; Zi Hongmin ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 79~98
Despite its contribution to the Korean medical service industry the question of how efficiently the Korean public hospitals have operated has been unresolved. This study gauges and analyzes the overall efficiency and the Malmquist productivity index in the industry over the period 1992 through 2001. In addition to cost efficiency. we also measure technical, allocative, pure technical and scale efficiencies. Furthermore. the Malmquist index is decomposed into efficiency and frontier changes. We identify several important factors which seem to have strong relationship with various inefficiency estimates. The results indicate that on average the public hospitals has wasted a significant amount of resources and costs over the period. Unlike many other industries, the low level of cost efficiency of the public hospital industry is mainly due to allocative inefficiency rather than technical inefficiency. The Maimquist productivity indices seem both due to the frontier change and efficiency change, but with more effect by the former. The results also indicate that the turnover of hospital beds has played an important role in determining efficiency and productivity of this important industry.
An Impact Analysis of Window Mechanism and End to End Delay of Tandem Queueing Network with Constant Service Times
Rhee Young ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 99~109
In this paper, we investigate the impact of window mechanisms on end to end delay in a series of nodes with constant service times. It is shown that arbitrary combinations of window mechanisms, each applying to an arbitrary subset of data, can be embedded on the nodes without affecting the departure instants from the system if the windows are at least as large as the number of nodes spanned. The window mechanisms are shown to have no impact on the average end to end delay of data. As the condition on the windows is a minimal necessary requirement for full parallelism, the results show that the transparent operation from viewpoint of data transmission can be achieved with minimal resources.
Demand Variability Impact on the Replenishment Policy in a Two-Echelon Supply Chain Model
Kim Eungab ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 111~127
We consider a supply chain model with a make-to-order production facility and a single supplier. The model we treat here is a special case of a two-echelon inventory model. Unlike classical two-echelon systems, the demand process at the supplier is affected by production process at the production facility as well as customer order arrival process. In this paper, we address that how the demand variability impacts on the optimal replenishment policy. To this end, we incorporate Erlang and phase-type demand distributions into the model. Formulating the model as a Markov decision problem, we investigate the structure of the optimal replenishment policy. We also implement a sensitivity analysis on the optimal policy and establish its monotonicity with respect to system cost parameters.
6-sigma Quality Management: Defining and Analyzing Causal Relationships 6-sigma Drivers, Action Competency, Management Performance - in the Manufacturing Sector -
Kim Gye-Soo ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 129~144
The goal of this study is to stress the importance of 6sigma quality management in improving the inner capabilities of manufacturing and the performances of the company. Six Sigma is widely recognized today as a process improvement methodology that can cut costs and eliminate defects in manufacturing processes. In this exploratory analysis. a model is developed and tested to fit research model with the structural equation modeling analysis. In conclusion. 6sigma leadership and flexible organizational culture are the important drivers among 6sigma activities. IT management strategy is significantly related to 6sigma quality management. 6sigma quality management is significantly related to financial performance. In addition. customer satisfaction is significantly related to financial performance.
Generating Mechanisms of Initial and Candidate Solutions in Simulated Annealing for Packet Communication Network Design Problems
Yim Dong-Soon ; Woo Hoon-Shik ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 145~155
The design of a communication network has long been a challenging optimization problem. Since the optimal design of a network topology is a well known as a NP-complete problem, many researches have been conducted to obtain near optimal solutions in polynomial time instead of exact optimal solutions. All of these researches suggested diverse heuristic algorithms that can be applied to network design problems. Among these algorithms, a simulated annealing algorithm has been proved to guarantee a good solution for many NP-complete problems. in applying the simulated annealing algorithms to network design problems, generating mechanisms for initial solutions and candidate solutions play an important role in terms of goodness of a solution and efficiency. This study aims at analyzing these mechanisms through experiments, and then suggesting reliable mechanisms.
A Prescriptive Group Decision Making Method with Imprecise Preference Information
Ahn Byeong-Seok ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 3, 2004, Pages 157~169
This paper presents a prescriptive approach to group decision making with group members' imprecise preference information. This includes an alternative method to Salo's inventive approach for identifying group's preferred alternative when attribute weights, consequences, and possibly group members' importance weights are specified in imprecise ways. The imprecise additive group value function can be decomposed into individual group member's imprecise decision making problems, which are finally aggregated to identify group's preferred alternative. The proposed approach is intuitive and easy to implement, and has merits in a couple of points. First. it is possible to view individual group member's inclinations toward conflicting alternatives and the degree of discrepancies to each other. Second, we can observe how much previous decision results of individual decision maker are influenced during interaction since decisions usually are not made at a single step especially in presence of partial preference information. Finally, the individual group member's decision results can be utilized for further investigation of dominance relations among alternatives in a case that interactive questions and responses fail to give a convergent group consensus.