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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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The Korean Operations and Management Science Society
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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
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A Study on the Relationship Between e-Service Orientation and Performance of Internet Business Organization
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 1~18
Due to the change to the digital environments, the offer of services on the on-tine differs from one on the on-line. This paper Identifies what functions internet business organizations should fulfill to provide on-line services of good qualify and analyzes whether these functions lead effectively to the expected performance of Internet business firms. The components of service orientation in the Internet business organizations appear to be the servant leadership, customer treatment from the Internet service encounter, Internet service failure prevention and recovery, Internet service standards communication, Internet service training, and internet service rewards. Therefore, these determinants should be incorporated in the practices, Procedures, end routines of Internet business organizations in order to create and provide excellent Internet services. Furthermore, it is demonstrated that Internet service orientation has a significant effect on satisfaction by employees and customers, the value and quality of Internet service, and the firm's performance. This implies that the service orientation is an Important factor In the on-line service organizations and that the internet business can be successful when the service orientation is diffused throughout the firm's organizations. It is also shown that the important factors, which connect Internet service orientation and its performance, are the service quality, value of Internet service and customer satisfaction. That is, the service orientation can ultimately lead to the corporate performance when customers are satisfied after confirming the value and quality of Internet service by visiting the web site.
Estimating the Macroeconomic IT Investment Effect of Korean Small Firms with System Dynamics Simulation
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 19~43
This study was motivated by a practical need for estimating the macroeconomic effect of government IT Promotion investment, specifically for micro and small firms. Small firms have been in a disadvantageous position to adopt and utilize new IT compared with medium or large-sized firms. Small firms don't have enough resource to acquire IT in general, therefore private IT companies don't have much incentive to develop IT services and products for small firms. Lack of feasible IT solutions for small firms again restricted active IT adoption of small firms. Government recognized the vicious cycle, therefore decided to promote private IT companies to develop IT services and products for small firms's. Our main concern was to identify a relevant government supporting Policy, especially in the amount and the period. To do this, we first constructed a system dynamics simulation model to Investigate important factors and causal relationships among them. Simulation results showed 2.19% of GDP contribution and 0.16% of employment contribution in max from small firms' IT adoption. Also we could find that investing proper amount for a short period would be for better than maintaining Investing small amount for a long period.
Valuation of Options in Incomplete Markets
Park, Byungwook ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 45~57
The purpose of this paper is studying the valuation of option prices in Incomplete markets. A market is said to be incomplete if the given traded assets are insufficient to hedge a contingent claim. This situation occurs, for example, when the underlying stock process follows jump-diffusion processes. Due to the jump part, it is impossible to construct a hedging portfolio with stocks and riskless assets. Contrary to the case of a complete market in which only one equivalent martingale measure exists, there are infinite numbers of equivalent martingale measures in an incomplete market. Our research here is focusing on risk minimizing hedging strategy and its associated minimal martingale measure under the jump-diffusion processes. Based on this risk minimizing hedging strategy, we characterize the dynamics of a risky asset and derive the valuation formula for an option price. The main contribution of this paper is to obtain an analytical formula for a European option price under the jump-diffusion processes using the minimal martingale measure
Collaborative Recommendations using Adjusted Product Hierarchy : Methodology and Evaluation
Cho, Yoon-Ho ; Park, Su-Kyung ; Ahn, Do-Hyun ; Kim, Jae-Kyeong ;
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 59~75
Recommendation is a personalized information filtering technology to help customers find which products they would like to purchase. Collaborative filtering works by matching customer preferences to other customers in making recommendations. But collaborative filtering based recommendations have two major limitations, sparsity and scalability. To overcome these problems we suggest using adjusted product hierarchy, grain. This methodology focuses on dimensionality reduction and uses a marketer's specific knowledge or experience to improve recommendation quality. The qualify of recommendations using each grain is compared with others by several experimentations. Experiments present that the usage of a grain holds the promise of allowing CF-based recommendations to scale to large data sets and at the same time produces better recommendations. In addition. our methodology is proved to save the computation time by 3∼4 times compared with collaborative filtering.
A multiobjective evolutionary algorithm for the process planning of flexible manufacturing systems
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 77~95
This paper deals with the process planning of flexible manufacturing systems (FMS) with various flexibilities and multiple objectives. The consideration of the manufacturing flexibility is crucial for the efficient utilization of FMS. The machine, tool, sequence, and process flexibilities are considered In this research. The flexibilities cause to increase the Problem complexity. To solve the process planning problem, an this paper an evolutionary algorithm is used as a methodology. The algorithm is named multiobjective competitive evolutionary algorithm (MOCEA), which is developed in this research. The feature of MOCEA is the incorporation of competitive coevolution in the existing multiobjective evolutionary algorithm. In MOCEA competitive coevolution plays a role to encourage population diversity. This results in the improvement of solution quality and, that is, leads to find diverse and good solutions. Good solutions means near or true Pareto optimal solutions. To verify the Performance of MOCEA, the extensive experiments are performed with various test-bed problems that have distinct levels of variations in the four kinds of flexibilities. The experiments reveal that MOCEA is a promising approach to the multiobjective process planning of FMS.
A Study on the Loyalty to Web Based Cyber Trading Systems
Journal of the Korean Operations Research and Management Science Society, volume 29, issue 2, 2004, Pages 97~116
Recently, e portion of on-line stock brokerage has been rapidly increased to be more than 50%, on the basis of contracted money. The usage of wCTS(Web Based Cyber Trading Systems) has now got into the steady state over the initial diffusion stage, which means wCTS has got more-than-half customer base in on-line service. Therefore, brokerage service providers have their competitive strategic focus on customer retention through the enhancement of customer loyalty. This study provides framework and survey results on explanation of wCTS user's loyalty, what and how factors affect wCTS user's loyalty. We adopt the results of early studies on information technology acceptance and diffusion such as TAM(Technology Acceptance Model) and IDT(Innovation Diffusion Theory). We also referred loyalty theory of marketing area and studios on CTS usage. We categorized explanation factors as three groups characteristics of users, characteristics of system, social environment. And we assumed that these three factors could affect the loyalty through two parameters : customer satisfaction and trust to the system. This study firstly shows that the ease of use and usefulness, the major factors of TAM. can also be applied to the loyalty of wCTS with resulting that the usefulness is more important than the ease of use In wCTS. Secondly, it shows that the innovative and risk-sensitive user has the lower degree of loyalty. Thirdly, it shows that the satisfaction and trust impact the loyalty simultaneously, the trust particularly impacts more strongly than the loyalty, due to the characteristics of monetary transaction in wCTS. This study provides meaningful results to the other on-line EC service fields as a first empirical research regarding the loyalty to wCTS which is a typical on-line EC service.