Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal Basic Information
Journal DOI :
Korean Institute of Industrial Engineers
Editor in Chief :
Volume & Issues
Volume 12, Issue 4 - Dec 1999
Volume 12, Issue 3 - Sep 1999
Volume 12, Issue 2 - Jun 1999
Volume 12, Issue 1 - Mar 1999
Selecting the target year
An Empirical Study on the Customer Satisfaction of Mobile Telecommunication Services with CVA(Customer Value Added) Concept
Youn, Jae-Uk ;
IE interfaces, volume 12, issue 4, 1999, Pages 487~495
Mobile telecommunication service is one of the most competitive and rapidly growing industries in Korea. In competitive environments, it is essential to measure and improve customer satisfaction(CS) levels. However, there are a few problems in existing methods of CS measurement. First, sacrifice such as price is not included properly. Thus, the CS is not expanded into the value concept which is important to customer's behavioral intention. Second, CS measurements are not benchmarked with other competitive companies and CS index cannot reflex it properly. AT&T experienced these problems and suggested customer value added (CVA) for CS measurement. In this study, we try to introduce the CVA concept into our mobile telecom services. CS attributes were constructed, an survey was conducted for 5 mobile telecom companies, CS survey results were presented, and the validity of CVA concept was discussed.
Evaluation Methods for Quality of Service in Telecommunications
Ahn, Hae-Sook ; Cho, Jae-Gyeun ; Yum, Bong-Jin ;
IE interfaces, volume 12, issue 4, 1999, Pages 496~505
Quality of Service(QoS) is the collective effect of service performances and has a direct impact on customer satisfaction. Although QoS is subjective, network performance parameters contributing to QoS can be measured physically. Therefore overall customer satisfaction for each test condition of the performance parameters is evaluated by asking respondents to indicate his or her opinion on a five-category rating scale i.e., excellent, good, fair, poor, and unsatisfactory. The opinion data resulting from the test can then be used to measure and analyze QoS from the customers' viewpoints. In this papaer, we consider two methods for analyzing the opinion data: MOS method and Cumulative Probability Curve method. The former evaluates an arithmetic mean of the opinion scores which quantify the surveyed opinions of respondents. The latter uses graphical and analytical models which are based on the distribution of the opinions rather than an arithmetic mean. The advantages, disadvantages, and an alternative of each method are discussed, together with future directions of research.
Path Analysis for Identifying the Effects of Perceived Variables on Anticipated Commitment in a Merged Bank
Sohn, So-Young ; Park, Jeong-Hoon ;
IE interfaces, volume 12, issue 4, 1999, Pages 506~513
We use a path analysis to identify influential latent variables on employees' anticipated commitment to a merged bank. Survey samples are taken from Hanvit bank which is a merged form of Hanil and Sangup. Latent variables used in the path analysis are perceptions of organizational support, contact conditions, organizational unity, employee threat and organizational commitment. We find an interesting pre-merger group membership effect as well as merger pattern perceived by employees on the path for the anticipated commitment to the merged bank.
A Case Study for Manufacturing Information System Design in Make-to-Order Production
Seo, Jun-Yong ; Kim, Jae-Gyun ; Koh, Jae-Moon ;
IE interfaces, volume 12, issue 4, 1999, Pages 514~531
This paper deals with the design of the manufacturing information system which is able to respond rapidly to various requirements of customers in make-to-order environment. The system is required to maintain a consistent flow of information from the start to the end. For this, we adopt an approach based on Information Engineering (IE) methodology, which consists of four stages: planning, analysis, basic design, and detail design. The first is a planing stage which establishes a project goal and organizes a project team. In the second stage, current activities are analyzed and problems are defined. The basic design is accomplished in the third stage, where a project scope is defined and an overall feature of the new system is presented. And then, in the last stage, the operation plan of each subsystem is drawn up in detail and all subsystems are integrated. This study applies the methodology to the case of H company and focuses on designing forms which are easy-to-write, easy-to-understand, and field-oriented. These forms are interrelated and can be used for systematic analysis and design. By applying them to the system design, we have obtained effect of reducing cost and time.
Minimizing the Number of Inter-Cell Movement of Parts with Consideration of a Machine-Cell Size
Park, Chang-Kyu ;
IE interfaces, volume 12, issue 4, 1999, Pages 532~539
The first step to design a cellular manufacturing system is to make part-families and machine-cells. This process is called the machine-part grouping. This paper considers a machine-cell size when grouping machine-cells. By considering a machine-cell size, an unrealistically big size of machine-cell which may be caused by the chaining effect can be avoid. A heuristic algorithm which minimizes the number of inter-cell movement of parts considering a machine-cell size is presented. The effectiveness and performance of the proposed heuristic algorithm are compared with those of several heuristic algorithms previously reported. The comparison shows that the proposed heuristic algorithm is efficient and reliable in minimizing the number of inter-cell movement of parts and also prevents the chaining effect.
Development of an Application Framework for Simple Evolutionary Algorithms
Lee, Soo-Yeon ; Chung, Ho-Yeon ; Seo, Kwang-Un ; Kim, Yeo-Keun ;
IE interfaces, volume 12, issue 4, 1999, Pages 540~550
In evolutionary algorithm, there exist various models for the evolution of the population with respect to schemes and strategies for reproduction. In the application of the algorithm to a specific problem, one model suitable to the problem is to be properly chosen and a program expert or a software is needed to help implement and test a designed algorithm. In this study, the software for simple evolutionary algorithms(SEA) with one population is developed. The software is designed as an application framework type, so that it may be friendly, allow users to add some program, and operate under the environment of Windows. For this, hierarchical classes for components of SEA are first designed by means of an object-oriented approach and then a library for SEA is built by them. With the library, developed is an application framework that can generate a frame code for an application program. The software proposed here can be used as a generalized tool for solving problems in a wide range of domains.
Comparison of Data Mining Classification Algorithms for Categorical Feature Variables
Sohn, So-Young ; Shin, Hyung-Won ;
IE interfaces, volume 12, issue 4, 1999, Pages 551~556
In this paper, we compare the performance of three data mining classification algorithms(neural network, decision tree, logistic regression) in consideration of various characteristics of categorical input and output data.
. 3 fractional factorial design is used to simulate the comparison situation where factors used are (1) the categorical ratio of input variables, (2) the complexity of functional relationship between the output and input variables, (3) the size of randomness in the relationship, (4) the categorical ratio of an output variable, and (5) the classification algorithm. Experimental study results indicate the following: decision tree performs better than the others when the relationship between output and input variables is simple while logistic regression is better when the other way is around; and neural network appears a better choice than the others when the randomness in the relationship is relatively large. We also use Taguchi design to improve the practicality of our study results by letting the relationship between the output and input variables as a noise factor. As a result, the classification accuracy of neural network and decision tree turns out to be higher than that of logistic regression, when the categorical proportion of the output variable is even.
A Pickup/Delivery Management System Using Geographic Information System and Global Positioning System
Ham, Sung-Hun ; Lee, Moon-Kyu ;
IE interfaces, volume 12, issue 4, 1999, Pages 557~566
This paper considers a door-to-door service system in which pickups or deliveries are performed by a trip of a single vehicle. Each customer request specifies the quantity of the load transported, the location, and the time window within which it is to be picked up or delivered. Since the system is demand responsive, i.e., new or emergent requests become available in real-time, the current vehicle route has to be reconstructed to include these requests. In this case, only continuous vehicle tracking enables control over the requests and ensures that the requests are satisfied on time. This paper suggests a pilot pickup/delivery management system integrating a geographic information system(GIS) and a global position system(GPS) to efficiently deal with such a dynamic environment. The GIS offers a way of displaying the vehicle route on digital maps for the region under concerned. Also displayed is the current location of the vehicle obtained from the GPS. A heuristic algorithm is used to dynamically determine the vehicle route. A practical example is provided to show the feasibility of the system.
Development of an Internet Based POP System
Kim, Seong-Hun ; Han, Young-Geun ;
IE interfaces, volume 12, issue 4, 1999, Pages 567~574
The use of POP(Point of Production) systems which help to report the realtime production information to the supervisor class and to send commands to the shop floor is increasing gradually. Future companies will need to break the limit of regions and to exchange information among remote-sited departments and companies located abroad. In order to achieve this goal, Internet which is growing remarkably nowadays will be the best tool. In this research, a prototype of the POP system based on Internet is developed using the Java language. The developed POP system can monitor production status by collecting information from shop floor through a web server and can control production equipments from remote sites.
Development of an Operating Software for a Model Plant using INTERBUSs
Jo, Young-Ho ; Jeong, Byung-Ho ;
IE interfaces, volume 12, issue 4, 1999, Pages 575~585
This study develops and operating software for a model plant. The model plant consists of an AS/RS system, two machining centers, an assembly line, and supplementary material handling equipments. Devices of each component are connected with the IBS RT24 DIO 16/16-T I/O module. Each I/O module communicates digital signals with the INTERBUS controller board via SUB-D 9 Connector cable. This study is a previous stage for developing an educational CIM software. Petri Nets is used for modelling the storage/retrieval of the AS/RS system, the flow of workpieces and the assembly line for parts. The operating software is coded with Microsoft Visual
5.0 and Interbus Library which is a software driver for the controller board. The operating software can be run on a MS Windows 95. Microsoft Access is used for the implementation of databases for BOM, AS/RS, and parts.
Development of a Block Assembly Scheduling System for Shipbuilding Company
Koh, Shie-Gheun ; Park, Ju-Chull ; Choi, Yong-Sun ; Joo, Chul-Min ;
IE interfaces, volume 12, issue 4, 1999, Pages 586~594
This paper introduces a production scheduling system for the block assembly shop in a shipbuilding company. We are to make a schedule for the assembly shop and related subassembly production shop. The objectives of the scheduling system are balancing of the workload of the subassembly shops as well as the assembly shop. There are a number of technological and resource constraints including assembly space restriction which is most important and critical resource in the shop. It is very hard and time consuming to consider the two problems, the workload balancing and the spatial allocation problem, simultaneously, and hence, we analyze the two problems independently. The first problem has already been introduced(고시근, 1996), and the overall appearance of the system and the spatial allocation algorithm are presented in this paper.
Accident Characteristics and Safety Management Policy in the Small Manufacturing Industry
Jeong, Byung-Yong ; Shin, Yun-Bong ;
IE interfaces, volume 12, issue 4, 1999, Pages 595~601
Accident analyses are used to identify common factors contributing to occupational accidents and to give recommendations for accident prevention. This study concerns with the accident characteristics and safety management in the small manufacturing industry. To investigate the accident characteristics, we used workers' compensation reports and employers' accident analysis reports. Two hundred and thirty injury accidents which results in more than 4 days absence were surveyed from the manufacturing companies with under 100 employees. The actual safety problems experienced today in the small manufacturing were also examined by interview method with safety engineers. We propose the safety management programs based on the accident characteristics and the actual safety problems. These results can be used to develop more effective occupational safety and health management policies in the small manufacturing industry.
An Application of the Analytic Hierarchy Process to the Selection of the Membrane Systems of Waste Water Treatment
Hong, Soon-Wook ; Kim, Gang-Min ; Kim, Tae-Hyun ; Cho, Keun-Tae ;
IE interfaces, volume 12, issue 4, 1999, Pages 602~616
Recently, due to the primary emphasis of environmental problem, the proper selection of the membrane systems necessary for waste water treatment has been one of the critical issues in the industrial sector. This paper shows how an Analytic Hierarchy Process (AHP) model can be used for assessing the performance of selected membrane systems: ultrafiltration, microfiltration, reverse osmosis, and electrodialysis essential for waste water treatments. The final results show that ultrafiltration is the most attractive membrane system to use in a water recycling system, followed by microfiltration, reverse osmosis and electrodialysis. This is consistent with the information that we found with respect to the elements that were taken into consideration. Sensitivity analysis is also provided here.
A Heuristic for Efficient Scheduling of Ship Engine Assembly Shop with Space Limit
Lee, Dong-Hyun ; Lee, Kyung-Keun ; Kim, Jae-Gyun ; Park, Chang-Kwon ; Jang, Gil-Sang ;
IE interfaces, volume 12, issue 4, 1999, Pages 617~624
In order to maximize an availability of machine and utilization of space, the parallel machines scheduling problem with space limit is frequently discussed in the industrial field. In this paper, we consider a scheduling problem for assembly machine in ship engine assembly shop. This paper considers the parallel machine scheduling problem in which n jobs having different release times, due dates and space limits are to be scheduled on m parallel machines. The objective function is to minimize the sum of earliness and tardiness. To solve this problem, a heuristic is developed. The proposed heuristic is divided into three modules hierarchically: job selection, machine selection and job sequencing, solution improvement. To illustrate its effectiveness, a proposed heuristic is evaluated with a large number of randomly generated test problems based on the field situation. Through the computational experiment, we determine the job selection rule that is suitable to the problem situation considered in this paper and show the effectiveness of our heuristic.
A Study on the Voice Traffic and Internet Traffic Estimation
Hwang, Jung-Yeon ; Kang, Byung-Ryong ; Jun, Kyung-Pyo ;
IE interfaces, volume 12, issue 4, 1999, Pages 625~634
On this study we selected some variable which affect on the estimated of the voice traffic, and estimated daily average traffic by years according to the variables. We applied nonlinear growth curve model to future traffic forecast with estimated historical traffic data. As a result of the forecasting, this study investigates the year in which the internet traffic goes far than the voice traffic.
The Development of Component-Based SCM System to be integrated with Heterogeneous ERP
Chang, Kyung-Won ; Choi, Jung-Won ; Yeo, Sung-Joo ; Wang, Gi-Nam ;
IE interfaces, volume 12, issue 4, 1999, Pages 635~642
Recently, business application vendors have responded to customer demand with several technological and organizational changes for reflecting network-oriented process flow with electronic communication and expanding their market. In organizational changes. Vendors are adding new functionality to their core offerings through mergers and acquisitions, or by partnering with front-office operation and SCM vendors. And technological changes are embracing the development of component-based application and middleware technology to be possible with integration of their function modules. We will present the design and development process of component-based SCM system to be integrated with heterogeneous ERP under implementation. Especially, we survey and analyze the technology related with CBD(Component-Based Development) to be adapted this research - component's design and methodology, the interface for component integration, middleware's development methodology of Enterprise Middleware vendo to bundle various types of middleware into a single package product with easy-to-use interface.