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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 37, Issue 4 - Dec 2012
Volume 37, Issue 3 - Sep 2012
Volume 37, Issue 2 - Jun 2012
Volume 37, Issue 1 - Mar 2012
Selecting the target year
A Literature Review of the Effectiveness Measurement for NCW
Jung, Chi-Young ; Lee, Jae-Yeong ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 1~16
DOI : 10.7737/JKORMS.2012.37.2.001
NCW(Network Centric Warfare) offers BSEs(Battelspace-Entities) the capabilities of sharing information through C4ISRCommand, Control, Communications, Computers and Intelligence, Surveillance and Reconnaissance) network and it also improves their combat powers based on information superiority with awareness of common situation in battlefield and self-synchronization. Although the concept of NCW was developed at the end of 1990 and there have been various studies for NCW from the development of its concept, the effort for measuring the synergistic effect of NCW is insufficient at the present time. Therefore, in this paper we reviewed literatures concerning the effectiveness measurement of NCW. The category of our survey is network effect, metrics, simulation, battlefield information, social network analysis and mathematical model. The main purpose of this study is to suggest future researchers a research direction by analyzing the aspects and limitations of existing studies about the quantitative measurement of NCW.
Securitization and Monitoring Incentives
Han, Jae-Joon ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 17~29
DOI : 10.7737/JKORMS.2012.37.2.017
We examine a mortgage bank's incentive distortion problem when the bank sells its existing loan through MBS(Mortgage-Backed Security), considering the mortgage market structure and varying investors' risk attitude. Main findings in our comparative statics are the followings. The bank's monitoring incentive on the loan sold is distorted downwards when the deposit interest rate is lower than the coupon rate of MBS. Credit enhancement associated with the loan sale may mitigate the incentive distortion problem. However, the downward distortion of monitoring incentive does not disappear unless the credit enhancement, a loan guarantee, is provided up to 100%. Finally as the investors' risk preference changes from risk-neutral to risk-averse type, the incentive distortion problem becomes more severe. At the end, we recommend the introduction of covered bond in order to mitigate the incentive distortion problem, which is inevitable to current pass-through MBS.
Analysis of Customer Arrival Process in an Appointment-Based Service System
Min, Dai-Ki ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 31~43
DOI : 10.7737/JKORMS.2012.37.2.031
Delivery of a good quality of service in an efficient manner requires matching the supply of capacity with customer demand. Much research has employed queueing models that analyzed the service system on the basis of independent and stationary customer arrivals. However, the appointment system, which is widely used to facilitate customer access to service in many industries including healthcare, has significant influence on the customer arrival process so that the independent and stationary assumption does not hold in an appointment-based service system. In this regard, this paper aims to propose a model for accurate illustration of the appointment-based customer arrival process. The use of the proposed model allows us to evaluate the overall system performance such as mean waiting time and service level under various appointment policies instead of conducting simulation studies.
Coordination of Component Production and Inventory Rationing for a Two-Stage Supply Chain with a VMI Type of Supply Contract
Kim, Eun-Gab ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 45~56
DOI : 10.7737/JKORMS.2012.37.2.045
This paper considers a supply chain consisting of a component manufacturer and a product manufacturer. The component manufacturer provides components for the product manufacturer based on a vendor-managed inventory type of supply contract, and also faces demands from the market with the option of to accept or reject each incoming demand. Using the Markov decision process model, we examine the structure of the optimal production control and inventory rationing policy. Two types of heuristics are presented. One is the fixed-buffer policy and the other uses two linear functions. We implement a computational study and present managerial insights based on the observations.
The Moderating Effects of Display Rule Fairness Perception and Problem-Focused Stress Coping on Emotional Labor
Kang, Won-Kyung ; Kim, Min-Soo ; Oh, Won-Kyung ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 57~72
DOI : 10.7737/JKORMS.2012.37.2.057
The moderators that relieve negative effects of emotional labor have been studied such as job characteristics and situational variables. But as reviewing these studies, they focused on the degree of emotional on certain condition, there's no distinction between that degree and moderating effects. So we should focus on the moderating variables as a organizational involvement. In this study, I hypnotized the mediating effect of job stress between emotional labor and organizational effectiveness. Then I explored moderating role of 'fairness perception of emotional labor' and 'problem-focused stress coping'. This study tested these relationships using data from 166 employees of domestic security service company. From this data, I found that emotional labor increases job stress and job stress fully mediates the relationship between individual attitude(job satisfaction, turnover intention). And one who perceives display rule fairer, feels less job stress than who is not. Lastly, one who copes more problem-focused when he/she experiences job stress, have less negative effect on turnover intention.
Development of Evaluation Index for Foreign Weapon System Purchase using DEMATEL and ANP
Cho, Hyun-Ki ; Kim, Woo-Je ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 73~88
DOI : 10.7737/JKORMS.2012.37.2.073
Even though the final source selection of foreign weapon system purchase project in defense area is the most important phase, the standard evaluation index has not been developed. This paper provides an appropriate evaluation index using DEMATEL and ANP methods. First, the all possible evaluation criteria applied to the relevant previous literatures in domestic and overseas researches are derived and classified into groups. Second, DEMATEL method is used to determine the network structure representing the relations of cause and effect between groups and their sub-criteria. If isolated factors, not connected with other factors, are existed in the network structure, all factors except for the isolated ones are grouped as one large factor so that the independency between those ones is maintained. The weights of criteria are determined using AHP method if the criteria are independent relation and ANP method if the criteria are networked. The weights of higher and lower level criteria are then integrated and distributed as a point with respect to the decision making purpose. The developed evaluation index can be used as a standard one in various foreign weapon system purchase projects in defense area.
A Study on the Effects of Inter-firm Coalition Loyalty Programs : Focusing on Customer Acquisition vs. Retention Effects
Lee, Jin-Won ; Song, Tae-Ho ; Kim, Ji-Yoon ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 89~111
DOI : 10.7737/JKORMS.2012.37.2.089
Coalition loyalty programs, loyalty cash-back programs that enable their members to accrue and redeem points at a wide-range of affiliated outlets, are emerging. In a coalition loyalty program, unlike in a single-brand loyalty program, points accrued from one outlet can be redeemed in other outlets which even may be of other brands than the very one where the points were from. However, in spite of such systematic characteristic of coalition loyalty programs, there is only little research on the effect of the program. The present study is aimed at examining the difference between the effects of a coalition and a single-brand loyalty program in terms of acquisition and retention of customers and tries to provide strategic implications for a firm to run a loyalty program. We classify purchase conditions into two types-acquisition vs. retention. Then we compare the effects of a coalition and a single-brand loyalty program on the purchase intention, under both the acquisition and the retention conditions. The result shows that the effect of the coalition loyalty program is stronger than that of the single-brand loyalty program under the acquisition condition. On the other hands, the single-brand loyalty program is more effective than the coalition loyalty program under the retention condition, at least for the minor brand.
Comparison of the Bass Model and the Logistic Model from the Point of the Diffusion Theory
Hong, Jung-Sik ; Koo, Hoon-Young ;
Journal of the Korean Operations Research and Management Science Society, volume 37, issue 2, 2012, Pages 113~125
DOI : 10.7737/JKORMS.2012.37.2.113
The logistic model and the Bass model have diverse names and formulae in diffusion theory. This diversity makes users or readers confused while it also contributes to the flexibility of modeling. The method of handling the integration constant, which is generated in process of deriving the closed form solution of the differential equation for a diffusion model, results in two different 'actual' models. We rename the actual four models and propose the usage of the models with respect to the purpose of model applications. The application purpose would be the explanation of historical diffusion pattern or the forecasting of future demand. Empirical validation with 86 historical diffusion data shows that misuse of the models can draw improper conclusions for the explanation of historical diffusion pattern.