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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 28, Issue 3 - Nov 2011
Volume 28, Issue 2 - Jul 2011
Volume 28, Issue 1 - Mar 2011
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Hybrid Multiple Hub-and-Spoke Vehicle Routing Model for Hyundai Mobis Automotive Service Parts Transportation Planning
Lee, Yong-Dae ; Jeong, Hyun-Jong ; Son, Young-Soo ; Yoon, Chi-Whan ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 1~13
Hub-and-spoke transportation network is a powerful and useful network structure that takes full advantage of economies of scale on routes between hubs. In recent studies, the network structure is extended to hybrid hub-andspoke that allows direct transportation between spokes. In this study, we considered more extended network structure which is called hybrid multiple hub-and-spoke that has multiple hubs and allows direct transportation between spokes. We developed a mathematical optimization model for automotive service parts transportation planning under hybrid multiple hub-and-spoke network structure. The model suggests a long-term transportation route planning and a short-term vehicle assignment planning. The model is verified by simulation and validated in real world application to Hyundai Mobis automotive service parts transportation planning. From the simulation result, the model reduced the transportation cost about 24.7%, the total distance about 6.8% and the CO2 emissions about 8.8%. In real world application for 6 months from July to December 2010, the model reduced the transportation cost about 9.1% by changing the long-term transportation route without daily vehicle assignment planning.
A Design Problem of a System Working at Both Primary Service and Secondary Service
Kim, Sung-Chul ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 15~29
In this paper, we consider a system working at both primary service and secondary service. A server can switch between the primary service and the secondary service or it can be assigned to secondary service as a dedicated server. A service policy is characterized by the number of servers dedicated to the secondary service and a rule for switching the remaining servers between two services. The primary service system is modelled as a Markovian queueing system and the throughput is a function of the number of servers, buffer capacity, and service policy. And the secondary service system has a service level requirement strategically determined to perform the service assigned. There is a revenue obtained from throughput and costs due to servers and buffers. We study the problem of simultaneously determining the optimal total number of servers, buffers, and service policy to maximize profit of the system subject to both an expected customer waiting time constraint of the primary service and a service level constraint of the secondary service and develop an algorithm which can be successfully applied with the small number of computations.
Determinants and Complementarities of the Technological Innovation Protection Mechanisms of Korean Manufacturing Firms
Yu, Kyung-Jin ; Hong, Soon-Ki ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 31~45
This study aims to analyze determinants and complementarities of the technological innovation protection mechanisms of Korean manufacturing firms. The results of the inter-industry comparison show that there are differentiations of the determinants among industries. Independence between legal and strategic protection mechanisms is found in the high technology industry, whereas complementarities exist between them in the low technology industry. It implies that the firms should take into account their endogenous and exogenous factors to choose appropriate combinations of the mechanisms when they build up their innovation protection strategies. This study expects to contribute to establishing technological innovation protection strategies in manufacturing industry.
The Aligned Evolution of Strategy, Structure, and Culture in a Changing Environment : The Case of POSCO
Kim, Chang-Su ; Lee, Yu-Kyung ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 47~60
While the literature is replete with arguments that corporate strategy, structure, and culture independently matter in explaining the growth and survival of firms, little theoretical and empirical attention has been devoted to understanding how the three organizational factors develop over time in interaction. Through in-depth case study, we examine the POSCO's historical development with respect to the strategy-structure-culture interface. Furthermore, by looking at the POSCO's longitudinal financial data we gain insight into whether the aligned evolution of strategy, structure, and culture is associated with performance.
Evaluating Stock Value using Data Envelopment Analysis
Kim, Bum-Seok ; Kim, Myung-S. ; Min, Jae-H. ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 61~72
This study suggests a DEA(Data Envelopment Analysis) based model to evaluate the value of corporate stock. The model integrating PER(Price-Earning Ratio), PBR(Price-BookValue Ratio), PSR(Price-Sales Ratio) and volatility in DEA structure has an advantage of overcome the limitation of traditional financial ratio based models. In order to show the effectiveness of the suggested model. we compare the performance of portfolio composed by DEA approach with those of portfolios made by traditional approaches such as PER, PBR, and PSR in terms of stock return and volatility. Specifically, we use the data of all the enterprises listed on the S&P 500 in the U.S. in 2007 and 2009 as the sample data for the experiments. The results of the experiments show that the performance of the DEA approach is clearly better than those of other approaches. Particularly, in sharply plummeting market, the performance of the DEA approach is shown to be prominently better than those of other approaches as the DEA approach reflects investment risk as well as profitability and growth. The DEA score combining the existing investment indices may serve as a useful barometer for selecting a stable and profitable portfolio.
Operational Risk Measurement of Financial Institutions via AHP
Choi, Seung-Il ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 73~82
Basel II advanced measurement approaches for operational risk need to estimate the frequency and severity distribution of operational losses. Due to lack of internal loss data, the estimation is impossible in many cases and so external loss data might be used by scaling on asset or gross income. To get around lack of loss data, scenario analysis combined with loss distribution approach can be useful in calculating the capital charge of operational risk. However, scenario based loss distribution approach requires much time and effort. Instead we may apply the analytic hierarchy process to measure operational risk of financial institutions. The analytic hierarchy process combined with loss distribution approach is to estimate the capital charge of operational risk in other areas based on the operational VaR in an area with sufficient loss data. AHP provides a tool for timely measurement of operational risk in this rapidly changing global environment.
A Research on Usage Factors of Mobile Microblogging Service
Jin, Jeong-Suk ; Lusi, Zhao ; Park, Joo-Seok ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 83~94
Microblogging is a Web2.0 technology that is used to manage online interpersonal relationship in SNS. Microblogging service allows the users to publish online brief text updates, usually less than 140~200 characters, sometimes images too. Recently, it becomes more and more popular. There are many reasons, the major one of which is that it can be perfectly combined with mobile. Based on technology acceptance model (TAM) and according to mobile service and microblogging service, this research adds four attributes : Perceived enjoyment, Habit, Mobility, Social Influence. It studies the factors that will impact on the way in which people use rapid developing Mobile Microblogging Service. This research will compare the influence factors and intension to use with the results from other studies with SNS and Mobile Microblogging Service, and then conclude the differences that can be generated in Microblogging.
Understanding Negative Electronic Word-of-Mouth(eWOM) : Social Ties and Key Determinants
Song, Seok-Woo ; Sun, Jong-Hak ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 95~112
The Internet has generated a number of online review sites where dissatisfied consumers can easily articulate their opinions and comments on products or services. Little attention, however, has been directed to investigating the relationship between negative electronic word-of-mouth (eWOM) and its critical determinants that affect consumers' purchasing behaviors. This study attempts to explore the influence of the key determinants of consumers' negative eWOM behaviors, including their social relationships online. The results show that tie strength is positively associated with the proposed determinants, such as information credibility, external search efforts, and product involvement. Further, we find that perceived risk plays a mediating role in the relationship between consumers' intention to spread eWOM and its key determinants.
An Exploratory Study on the Acceptance Factors of the Innovative Technology in Area of Information Technology
Choi, Young-Jin ; Ra, Jong-Hei ; Jung, Yong-Kyu ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 113~124
Today, change in the information technology field is very fast, the innovative technology or product to be released for the other sectors tend more frequent. In this situation, most of potential users should think carefully about the adoption of innovative technology such as Web2.0. On the other hand, the adoption or acceptance of innovative technology has the paradox of technology. In order to verify the acceptance factors of innovative technology, we are proposed the model based on the DOI and MIR. Conceptually, we examine the four independent variables such as relative benefit, compatibility, complexity, risk that are divided into two parts as positive and negative, a moderating variable effect on independent variables that is the social influence, and their impacts on the acceptance of new technology. The questionnaire which consists of 100 questions was used to analyze the result to IT suppliers and customers in public sector. Finally, our research model was tested in an empirical study, which confirmed all of our hypotheses.
Glocalization of e-Services
Min, Jae-H. ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 125~141
We have recently witnessed many of global companies did not successfully adapt themselves to local markets, and finally exited the markets experiencing failures. The purpose of this study is to suggest practical glocalization strategies for global e-service companies to run their respective businesses in local markets with success. Glocalization is a terminology blending globalization and localization, meaning that global companies adapt themselves to local cultures, environment, languages, laws and regulations so as to survive and prosper in those markets while maintaining high quality of standards and processes they originally have for global competitive edge. Examining success stories as well as failure ones of global e-service companies having entered Asian markets, we provide marketing mix strategy for successful glocalization, and suggest some guidelines for prospective e-service companies wishing to enter local markets with different cultures and languages to fit themselves to new environments.
A Methodology for Future Technology Foresight based on Scenario through the Analysis of Future Customer Needs
Kim, Young-Myoung ; Kim, Min-Kwan ; Lee, Jun-Suk ; Han, Chang-Hee ;
Korean Management Science Review, volume 28, issue 3, 2011, Pages 143~159
Recently, the level of uncertainty in R&D investment for an enterprise has increased due to technological development and industrial changes. Accordingly it is necessary for an enterprise to forecast the future or foresight the future technologies. But, the fact that the methodology used in predicting future technology is suitable for large project makes enterprise difficult to forecast the future technologies or trends. Thus, this study seeks for available methodology for future technology foresight from enterprise standpoint. The methodology proposed in this research is based on the scenario model, especially focused on the customer needs and future society change.