• Journal of the Korea Society of Computer and Information
• /
• v.10 no.3 s.35
• /
• pp.267-273
• /
• 2005

The internet is not simply a new technology that businesses are adopting to reduce their costs of operations and increase revenues. It is literally transforming the way business work. Electronic commerce refers generally to all forms of transactions relating to commercial activities. This research was conducted to identify the critical success factors of electronic commerce. In this study it is found that price and customer service are very important to increase customer satisfaction and intention to repurchase. In addition, the result of this study shows that (1) ease of use, (2) transaction efficiency and (3) qualify assurance are very important to increase customer satisfaction. And, the result of this study shows that (1) ease of use and (2) security are very important to increase intention to repurchase.

• Journal of the Korean Society for Railway
• /
• v.10 no.1 s.38
• /
• pp.16-21
• /
• 2007

Along with the opening of the high speed railroad in 2004, the number of long tunnels constructed is increasing and will be continued. In this respect, the fro inside the tunnels is a main cause of drastic damages to both facilities and lives of passengers on board, especially more severe consequences are expected if the fire occurs on a train in urban area. Even though, the threat to human lives due to the increasing number of tong tunnels and increasing train operation times inside such tunnels is getting bigger, the studies to measure safety of the tunnel and to enhance the safety of passengers have not been carried out enough in Korea. Therefore, in this paper, we will use the probabilistic method to predict the average number of deaths of passengers in case of fire on a train iii tunnel, and show the potential risk to passengers which can be a guide for safer design of tunnels to be constructed.

• IE interfaces
• /
• v.22 no.2
• /
• pp.153-164
• /
• 2009

An effective management for reverse flows of products such as reuse, repair and disposal, has become an important issue for every aspect of business. In this paper, we study the Location-Routing Problem (LRP) in the multi-stage closed-loop supply chain network. The closed-loop supply chain in this study integrated both forward and reverse flows. In forward flow, a factory, Distribution Center (DC) and retailer are considered as usual. Additionally in reverse flow, we consider the Central Returns collection Center (CRC) and disposal facility. We propose a mixed integer programming model for the design of closed-loop supply chain integrating both forward and reverse flows. Since the LRP belongs to an NP-hard problem, we suggest a heuristic algorithm based on genetic algorithm. For some test problems, we found the optimal locations and routes by changing the numbers of retailers and facility candidates. Furthermore, we compare the efficiencies between open-loop and closed-loop supply chain networks. The results show that the closed-loop design is better than the open one in respect to the total routing distance and cost. This phenomenon enlarges the cut down effect on cost as an experimental space become larger.

• Journal of Electrical Engineering and Technology
• /
• v.13 no.5
• /
• pp.1864-1873
• /
• 2018

Energy shifting is an innovative method used to obtain the highest profit from the operation of energy storage systems (ESS) by controlling the charge and discharge schedules according to the electricity prices in a given period. Therefore, in this study, we propose an optimal charge and discharge scheduling method that performs energy shift operations derived from an ESS efficiency model. The efficiency model reflects the construction of power conversion systems (PCSs) and lithium battery systems (LBSs) according to the rated discharge time of a MWh-scale ESS. The PCS model was based on measurement data from a real system, whereas for the LBS, we used a circuit model that is appropriate for the MWh scale. In addition, this paper presents the application of a genetic algorithm to obtain the optimal charge and discharge schedules. This development represents a novel evolutionary computation method and aims to find an optimal solution that does not modify the total energy volume for the scheduling process. This optimal charge and discharge scheduling method was verified by various case studies, while the model was used to realize a higher profit than that realized using other scheduling methods.

• The Journal of Information Technology
• /
• v.1 no.1
• /
• pp.1-11
• /
• 1998

Today's firms face task of achieving competencies in two somewhat mutually exclusive areas. That is, due to fierce competition in the market, firms need to provide better products and services without losing cost advantage. In this respect, effective logistics management is one of the process that can yield a foundation of competitive advantage. Many firms are already using integrative supply chain management to achieve mutual goals of each firms within the supply chain. However, it is highly likely that inefficiency will occur because of different operations systems and organizational characters of each firms. Information system is receiving attentions as to reduce inefficiencies and gain competitive advantage. This study analyzes the effects of information integration on logistics performance to search the role of information system in supply chain management.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.25 no.6
• /
• pp.1131-1142
• /
• 2001

This research attempts to evaluate the globalization concept and the development of advance progress of the Korean clothing and textile industry toward globalization. Globalization is driven by technology, which create the homogenization of tastes. In the business sector, globalization drives not only the physical presence in the foreign countries, but the way of looking at world markets and organizing as a basis for construction. The process of globalization of a company simply consists of exportation, establishment of foreign branch offices and overseas operations. Entrance to the overseas market can be divided into two categories, where one is based upon exportation method, and the other is based upon direct foreign investment. To observe the development of globalization of the Korean clothing and textile industry, a analysis of exportation and direct foreign investment by the industry was conducted. The result revealed the following: (i) The exportation and direct foreign investment of Korean clothing and textile industry has been focused in Asia, and the industry is influenced by cultural and geographic consciousness: and (ii) although the clothing and textile industry of Korea is still incomplete when compared to all industry, the study shows that globalization of the textile and garment industry is well underway.

• Industrial Engineering and Management Systems
• /
• v.11 no.1
• /
• pp.54-69
• /
• 2012

Chan and Qi (SCM 8/3 (2003) 209) developed an innovative measurement method that aggregates performance measures in a supply chain into an overall performance index. The method is useful and makes a significant contribution to supply chain management. Nevertheless, it can be cumbersome in computation due to its highly complex algorithmic fuzzy model. In aggregating the performance information, weights used by Chan and Qi-which aim to address the imprecision of human judgments-are incompatible with weights in additive models. Furthermore, the default assumption of linearity of its scoring procedure could lead to an inaccurate assessment of the overall performance. This paper addresses these limitations by developing an alternative measurement that takes care of the above. This research integrates three different approaches to multiple criteria decision analysis (MCDA)-the multiattribute value theory (MAVT), the swing weighting method and the eigenvector procedure-to develop a comprehensive assessment of supply chain performance. One case study is presented to demonstrate the measurement of the proposed method. The performance model used in the case study relies on the Supply Chain Operations Reference (SCOR) model level 1. With this measurement method, supply chain managers can easily benchmark the performance of the whole system, and then analyze the effectiveness and efficiency of the supply chain.

• Journal of Korean Institute of Industrial Engineers
• /
• v.42 no.3
• /
• pp.182-197
• /
• 2016

One of the distinctive characteristics of industrial engineering (IE) is its multidisciplinarity. This paper explores the multidisciplinary nature of IE using journal citation network analysis. Using the relatedness indexes of IE journals obtained from journal citation report (JCR), we firstly construct the IE network only composed of 26 IE journals. The resulting IE network is partitioned into three sub-networks: management engineering, manufacturing/quality, and ergonomics. We then propose the IE convergence network which includes 81 related journals in other disciplines as well as 26 IE journals. Scrutinizing the IE convergence network reveals that IE has a high degree of interactions with seven disciplines : Operations Research and Management Science, Statistics and Probability, Manufacturing Engineering, Computer Science, Engineering Design, Business Management, Human Factors and Ergonomics. We investigate the contributions of the related disciplines to IE as well as contributions of IE to the related disciplines. The role of IE journals in exchanging knowledge with related disciplines is also identified by brokerage analysis. It is shown that visualizing and analyzing the IE convergence network can provide an excellent overview of the multidisciplinary structure of IE, which can help IE researchers easily grasp the state-of-the art of IE research.

• Journal of Korea Society of Industrial Information Systems
• /
• v.5 no.3
• /
• pp.30-37
• /
• 2000

Management science/operations research (MS/OR) educational software packages are widely used at the present time. Those software packages are expected to help students understand MS/OR techniques better. However, MS/OR educational software packages are often used as computational tools to obtain model solutions efficiently rather than as the tutoring software packages. Several possible reasons for the lack of effective tutoring capacity in MS/OR educational software packages are identified in this paper. The authors believe that the deficiency of tutoring capacity in those software is mainly due to technological limitations (computers and artificial intelligence) and the MS/OR professionals' perception about those software packages. Given technological limitations, feasible design and development approaches are provided to improve the tutoring effectiveness of MS/OR educational software packages.

• Journal of the Korea Society of Computer and Information
• /
• v.18 no.8
• /
• pp.141-148
• /
• 2013

Traditional face-to-face university education has shifted its course to combine the advantages of both online and offline education in a blended-learning approach. However, there is still much that is unknown about the actual effect of blended learning, particularly it's learning outcomes in terms of cost effectiveness. This study qualitatively examines the costs and the learning outcomes of blended learning at an on-line college and off-line university. Online college level English pedagogy courses and blended with offline operations at an online university were studied across two semesters in terms of the quality of education, and both direct and indirect cost savings. Other causes for various learning outcomes and cost implications are proposed and validated.