• Proceedings of the Korean Operations and Management Science Society Conference
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• 1994.04a
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• pp.291-300
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• 1994

In this paper we consider the frequency assignment problem (FAP) in a cellular mobile communication system which has a maximal distance of channel interference. This special structure is observed in most cellular systems. To handle the considered FAP, we use the pattern approach which fits naturally to the problem. Based on this approach, we are able to formulate the considered FAP into a manageable optimization problem and propose a two phase heuristic algorithm for the problem. Computational experiments show that our algorithm performs much better in both solution quality and computational time than the recently developed algorithms for FAP. Since the considered FAP well reflects most cellular systems, our algorithm can be applied to many practical situations.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.572-579
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• 2003

With the expansion of e-commerce, E-marketplace has become one of the most discussed topics in recent years. Limited theoretical works, however, have been done to optimize the practical use of e-marketplace systems. Other potential issues aside, this research has focused on this problem: 'the participants waste too much time, effort and cost to find out their best partner in B2B marketplace.' To solve this problem, this paper proposes a system which provides the user-company with the automated and customized brokering service. The system proposed in this paper assesses the weight on the priorities of a user-company, runs the two-stage clustering algorithm with self-organizing map and K-means clustering technique. Subsequently, the system shows the clustering result and user guide-line. This system enables B2B marketplace to have more efficiency on transaction with smaller pool of partners to be searched.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.10a
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• pp.13-16
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• 1996

This paper addresses the time and motion study on the woodworking in the primary school. Time study by stopwatch is performed for calculating the standard tie of woodworking. The operator process chart is developed for better illustration and teaching methodology. The purpose of this study is to present a good guideline for woman teachers or beginers(teachers), as well as to provide how much time units are adequate for a special woodworking unit of practice art. According to the result, the contribution of this paper is very much and it is very useful for both teachers and students.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1740-1745
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• 2006

This paper is concerned with a novel heuristic algorithm for the multi-trip vehicle routing problem with time windows. The objective function is the minimization of total vehicle operating time, fixed cost of vehicle and the minimization of total lateness of customer. A mixed integer programming formulation and a heuristic algorithm for a practical use are suggested. A heuristic algorithm is constructed two phases such as clustering and routing. Clustering is progressed in order to assign appropriate vehicle to customer, and then vehicle trip and route are decided considering traveling distance and time window. It is shown that the suggested heuristic algorithm gives good solutions within a short computation time by experimental result.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1221-1226
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• 2006

The use of Artificial Neural Networks (ANN) has received increasing attention in the analysis and prediction of financial time series. Stationarity of the observed financial time series is the basic underlying assumption in the practical application of ANN on financial time series. In this paper, we will investigate whether it is feasible to relax the stationarity condition to non-stationary time series. Our result discusses the range of complexities caused by non-stationary behavior and finds that overfitting by ANN could be useful in the analysis of such non-stationary complex financial time series.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1733-1739
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• 2006

This paper is concerned with multi-objective vehicle routing problem(VRP), in which objective of this problem is to minimize the total operating time of vehicles and the total tardiness of customers. A mixed integer programming formulation and a heuristic for practical use are suggested. The heuristic is based on the route-perturbation and route-improvement method(RPRI). Performances are compared with other heuristic appeared in the previous literature using the modified bench-mark data set. It is shown that the suggested heuristic give good solution within a short computation time by computational experiment.

• Proceedings of the Korean Society for Quality Management Conference
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• 2010.04a
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• pp.321-330
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• 2010

In this paper, we analyze factor that is composing city brand property that the latest interest is enlarged and studied what influence this is exerting on attitude of city consumer and loyalty degree. Specially, analyzing structural causality whether exert some influence on city brand through control effect analysis of area special product and consumer attitude. We wish to give help that is practical working in city competitive power elevation.

• Korean Journal of Organic Agriculture
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• v.19 no.2
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• pp.157-184
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• 2011

This work is based on the experience of active and successful organic marketing initiatives, and aims to provide advice for genuine and practical sustainability. To make successful marketing possible we describe, on the one hand, the main challenges of the market and policy environment for organic marketing initiatives and, on the other hand, key factors for management. Management planning is a key issue for successful marketing and is therefore the focus of special attention in this work. This paper summarises and highlights those key factors which influence the operations of an organic marketing initiative. These include the role of key individuals, the role of innovation, the importance of strategic planning and clear objectives, the role of coherence, motivation and identity, brand policy, the role of networks, the importance of market research, public funding, economies of scale, systematized cooperation, hazards and risks in general.

• Proceedings of the CALSEC Conference
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• 2005.03a
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• pp.149-154
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• 2005

Recently, lots of EDI-VAN (Electronic Data Interchange-Value Added Network) companies challenge to convert their business systems into Web-based e-business frameworks to avoid high cost and closed structure of EDI system. This research proposes e-Transformation strategies for EDI-VAN companies to adopt Web-based e-business standard frameworks such as ebXML (e-business using XML) and RosettaNet. Four migration strategies for EDI companies are presented, and their properties are described in detail. Transformation procedures of two representative strategies are also provided fur the convenience of medium-sized companies. The result of this work can be used as a practical guideline for EDI companies to develop there own transformation strategy suitable to its scale and capability, while minimizing the impacts on the pre-existing business processes.

• Management & Information Systems Review
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• v.23
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• pp.99-134
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• 2007

In recent years there has been much emphasis on the need for service firms to develop an organizational culture which facilitates the successful implementation of marketing activities. This study examines the relationship among marketing culture, service quality, customer satisfaction, and customer loyalty in fast food service firms. The results of empirical analysis can be summarized by the following: First, marketing culture(employee service quality, interpersonal relationships, selling task, organization, internal communications, innovativeness) had a significant direct effect on service quality. Second, marketing culture(employee service quality, selling task, internal communications) had a significant direct effect on customer satisfaction. It had also a positive, significant indirect effect on customer satisfaction through service quality. Third, service quality had a significant indirect effect on customer loyalty through customer satisfaction. Therefore, the results of the study provide the practical implication for establishment of service firms' marketing strategies, related to marketing culture.