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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
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Journal DOI :
The Korean Operations and Management Science Society
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Volume & Issues
Volume 36, Issue 4 - Dec 2011
Volume 36, Issue 3 - Sep 2011
Volume 36, Issue 2 - Jun 2011
Volume 36, Issue 1 - Mar 2011
Selecting the target year
A Splitter Location-Allocation Problem in Designing FTTH-PON Access Networks
Park, Chan-Woo ; Lee, Young-Ho ; Han, Jung-Hee ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 1~14
In this paper, we deal with an access network design problem of fiber-to-the-home passive optical network (FTTH-PON). The FTTH-PON network design problem seeks to minimize the total cost of optical splitters and cables that provide optical connectivity between central office and subscribers. We develop a flow-based mixed integer programming (MIP) model with nonlinear link cost. By developing valid inequalities and preprocessing rules, we enhance the strength of the proposed MIP model in generating tight lower bounds for the problem. We develop an effective Tabu Search (TS) heuristic algorithm that provides good quality feasible solutions to the problem. Computational results demonstrate that the valid inequalities and preprocessing rules are effective for improving the LP-relaxation lower bound and TS algorithm finds good quality solutions within reasonable time bounds.
Sequential Causal Analyses of Exchange Party's Characteristic, Exchange Relation Perception, Relationship Quality and Behavioral Intention : Customer's Perspective
An, Bong-Geun ; Ju, Ki-Jung ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 15~32
The research for exchange relationship in customer's perspective is meaningful especially in service, considering distinctive characteristics of service operations such as customer participation in the process whereas most of the recent related researches have been focused on employee's interaction with organization, leader, team and customer. In this study for beauty art service, the exchange party's characteristic is defined with beauty salon's reputation, staff's professionalism and customer's self-esteem. Also the exchange relation perception is classified into symbolism and interaction, Then the directional relations on customer's perspective are empirically investigated in the sequential order of the exchange party's characteristics, the exchange relation perception, the relationship quality and behavioral intention. In addition, the study examined the meditation effect via relationship quality between the exchange relation perception and the behavioral intention. Followings are confirmed from the statistical test with structural equation modelling：Symbolism is significantly caused by all of professionalism, reputation and self-esteem in the descending order of effect size whereas interaction is significantly influenced by only professionalism. The exchange relation perception has significant effect on the relationship quality, in turn which significantly affects behavioral intention. The exchange relation perception shows the significant indirect effect meditated by relationship quality and the insignificant direct effect on behavioral intention. This paper concludes with contribution of this study, managerial implication of the research findings and further research issues.
A Study on the Optimal Rate Allocation Problem in Overlay Multimedia Multicasting
Chung, Ji-Bok ; Choi, Byung-Cheon ; Park, Jong-Dae ; Ryu, Ho-Yong ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 33~42
Overlay multicasting has received a lot of attention as a core technology for multimedia streaming service. In this paper, we consider the discrete optimal rate allocation problem in multimedia overlay multicasting, which has been proposed by Akbari et al.. The computational complexity of this problem is not known. Thus, we propose a special case which can be solved in polynomial time.
On the Separation of the Rank-1 Chvatal-Gomory Inequalities for the Fixed-Charge 0-1 Knapsack Problem
Park, Kyung-Chul ; Lee, Kyung-Sik ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 43~50
We consider the separation problem of the rank-1 Chvatal-Gomory (C-G) inequalities for the 0-1 knapsack problem with the knapsack capacity defined by an additional binary variable, which we call the fixed-charge 0-1 knapsack problem. We analyze the structural properties of the optimal solutions to the separation problem and show that the separation problem can be solved in pseudo-polynomial time. By using the result, we also show that the existence of a pseudo-polynomial time algorithm for the separation problem of the rank-1 C-G inequalities of the ordinary 0-1 knapsack problem.
Comparison of CONWIP with Kanban in a Production Line with Constant Processing Times
Lee, Ho-Chang ; Seo, Dong-Won ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 51~65
We compared a CONWIP(constant work-in-process) system with a kanban system in a production line with constant processing times. Based on the observation that a WIP-controlled line production system such as CONWIP and kanban is equivalent to a m-node tandem queue with finite buffer, we applied a max-plus algebra based solution method for the tandem queue to evaluate the performance of two systems. Numerical examples with 6 workstations were used to demonstrate the proposed analysis. The numerical results support the previous studies that CONWIP outperforms kanban in terms of expected waiting time and WIP. Unlike the kanban case, sequencing workstations in a CONWIP does not affect the performance of the system.
The Impact of the Knowledge Management Strategic Alignment on the Innovation of Manufacturing Firms
Choe, Jong-Min ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 2, 2011, Pages 67~88
This study empirically investigated the effects of knowledge management(KM) strategic alignment on the KM activities as well as the product and process innovation of manufacturing firms. Based on the framework, which employs the usage levels of target costing systems(TCS) and information technology(IT) infrastructure, four types of KM strategies were identified and proposed：mixed, explorative, exploitative and negative strategies. In this research, these four types of KM strategies were empirically validated. According to the results of this study, it was found that when a explorative KM strategy is aligned with a low-cost strategy, KM activities are activated and the degree of a process innovation is increased. It was observed that in the case of the alignment between a differentiation strategy and a exploitative KM strategy, both KM activities and the level of a product innovation are enhanced. The results also demonstrated that for the enhancement of both a process and a product innovation through the activation of KM activities, a mixed KM strategy must be aligned with a composite business strategy, which focuses on a low-cost as well as a differentiation strategies. Accordingly, it is concluded that the KM activities and the levels of the product and process innovation can be activated or improved with the alignment of the KM strategies and business strategies.