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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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
The Effect of Online Brand Community Commitment on Brand Loyalty
Kwahk, Kee-Young ; Ock, Jung-Bong ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 1~26
As brand is increasingly important as a competitive source and information and communication technology based on Internet is rapidly advanced, many companies have paid attention to online brand community that is expected to help strengthen the customer's awareness on their products and services. This study suggests four factors-interaction, purpose, playfulness, reward-that facilitate online brand community commitment, and examines the effect of online brand community commitment on brand loyalty from the perspective of social identity theory. For this purpose, 243 sample data were collected from three online brand community sites and the proposed research model was empirically tested using LISREL 8.7 based on structural equation model. In conclusion, this study proposed theoretical and practical implications along with its limitations and future studies.
Some Conjectures for the Newsvendor Problem under Progressive Multiple Discounts
Won, You-Kyung ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 27~43
This paper investigates properties of the newsvendor problem under a schedule involving progressive multiple discounts compared with the standard newsvendor problem under a no-discounts schedule. Unlike most conventional approaches using the criticial fractile to analyze the retailer and/or supplier behavior(s) in the newsvendor problem, our approach uses riskless profit. From the properties revealed through a series of computational experiments, two conjectures regarding the relationship between the expected profits of both newsvendor problems as a generalization over Khouja's argument (1995) are raised. Those conjectures encourage newsvendors who may face budget or warehouse capacity restriction to use the extended model under a multiple-discounts schedule rather than the standard model with no-discounts schedule because they apply for every order quantity as well as the optimal order quantity. In addition to the conjectures, some insightful results are found to justify the implementation of a multiple-discounts schedule from the computational experiments and a new interpretation for implementation of a multiple-discounts schedule that has not been addressed in Khouja is provided.
Queueing Traffic Model of Giving a Priority to Handoff Calls in OFDMA Wireless Communication Systems
Paik, Chun-Hyun ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 45~59
OFDMA systems have been expected to be widely used to provide multimedia services over wireless channels. To evaluate performance of the OFDMA system, power should be considered as system resource as well as subcarriers. This study propose a queueing traffic model incorporating two kinds of resources (power and subcarriers), and an extended model giving a priority to handoff calls over new calls. Some extensive experiments are conducted to illustrate the usefulness of the proposed traffic model.
Analysis of the Value of Yield Information under Periodic Review Inventory System
Min, Dai-Ki ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 61~74
The objective of this study is to evaluate the effects of sharing uncertain yield information with a downstream supply chain player. We are interested in understanding how the amount of yield uncertainty affects the supply-side benefits and/or costs, which has not been considered in the literature, in addition to the customer-side benefits. With that purpose, this work evaluates a supplier who provides yield information in comparison with another supplier who shares no information. We simulate an order-up-to type heuristic policy that is adapted from the literature and reasonably modified to represent yield information sharing with error. From the simulation study, we argue that the customer would experience cost reduction, but the cost for supplier's inventory is increasing when sharing yield information. Furthermore, the amount of benefits and costs are situational and affected by level of yield uncertainty and demand variance. Based on the simulation study, we finally make several recommendations for the supply-side approaches to yield information sharing.
Investigation of the Relationship between Endorser Fit and Advertising Effectiveness in Print Advertising
Hwang, In-Suk ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 75~90
Suggesting that endorser fit in print advertising can be subdivided into observable endorser-product fit, unobservable endorser-product fit, and observable endorser-background fit, this study empirically investigates their effects on advertising effectiveness. Undergraduate students participated in the study and evaluated three real advertisements on the items of the fits, the advertising effectiveness, and so on. The advertisements were for a watch, perfume, and women's clothing. Results showed that each of fits had an positive effect on advertising attitude, brand attitude, and purchase intention respectively and the observable endorser-product fit had a more positive effect on such an effectiveness than the unobservable endorser-product fit and the observable endorser-background fit in the majority of cases. It was also found that each of the fits had a tendency to exert relatively greater effects on the advertising effectiveness, especially on the purchase intention, compared to the endorser preference.
Joint Replenishment Problem for Single Buyer and Single Supplier System Having the Stochastic Demands
Jeong, Won-Chan ; Kim, Jong-Soo ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 91~105
In this paper, we analyze a logistic system involving a supplier who produces and delivers multiple types of items and a buyer who receives and sells the products to end customers. The buyer controls the inventory level by replenishing each product item up to a given order-up-to-level to cope with stochastic demand of end customers. In response to the buyer's order, the supplier produces or outsources the ordered item and delivers them at the start of each period. For the system described above, a mathematical model for a single type of item was developed from the buyer's perspective. Based on the model, an efficient method to find the cycle length and safety factor which correspond to a local minimum solution is proposed. This single product model was extended to cover a multiple item situation. From the model, algorithms to decide the base cycle length and order interval of each item were proposed. The results of the computational experiment show that the algorithms were able to determine the global optimum solution for all tested cases within a reasonable amount of time.
Retailer's Store Brand Product Line Design and Product Assortment Decision in the Vertically Differentiated Product Category
Chung, Hwan ;
Journal of the Korean Operations Research and Management Science Society, volume 36, issue 3, 2011, Pages 107~120
The increased availability of store brand suppliers now provides retailers with opportunities to create their own lines of vertically differentiated multiple store brands within a product category. As the number of store brands increase, the retailer's shelf space becomes more crowded, which may force the retailer to consider dropping some national brands from its assortment. Despite these trends, the problem of product line design in a vertically differentiated product category has been analyzed mainly from a manufacturer's perspective in the marketing literature and it is not known to what extent the findings of the existing product line design literature provide applicable strategic guidelines for the new problem faced by retailers. In this study, we address this deficiency in the literature and conduct an in-depth study of the retailer's strategic design of a line of store brands and its assortment decision within the context of retail category management. We analyze the retailer's decision about not only how to design a line of store brands but also which national brand to drop from its assortment. The results of our analysis are as follows. First, if the retailer has to drop one of national brands from its assortment, it is the best for the retailer to drop the low-quality national brand rather than the high-quality national brand. Second, the retailer has to position the high-quality store brand relatively close to the high-quality national brand, remained on its shelf, in terms of quality so as to maximize the size of retail margin from the national brand. On the other hand, the retailer should set the quality of the low-quality store brand at a lower level than that of the low-quality national brand to increase the total category demand by attracting more price sensitive consumers. By doing so, the retailer can also minimize cannibalization between two store brands. Lastly, our analysis shows that the introduction of a line of store brands improves consumer welfare by increasing real values of all products on the shelf.