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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal DOI :
Korean Institute of Industrial Engineers
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Volume & Issues
Volume 20, Issue 4 - Dec 2007
Volume 20, Issue 3 - Sep 2007
Volume 20, Issue 2 - Jun 2007
Volume 20, Issue 1 - Mar 2007
Selecting the target year
Exploring Undergraduate Education of Industrial Engineers:Result of Survey for Graduates with Industrial Engineering Degree
Park, Yang-Byung ; Rim, Suk-Chul ; Hong, Sung-Jo ; Kim, Kwang-Jae ; Yun, Myung-Hwan ; Kim, Jong-Hwa ; Lee, Deok-Joo ; Cho, Nam-Wook ; Suh, Young-Bo ;
IE interfaces, volume 20, issue 1, 2007, Pages 1~10
The main purpose of this research is to find out whether curriculums of industrial engineering (IE) departments meet the demand of IE graduates working in various fields. The research was conducted as an online questionnaire survey selecting IE Graduates working in industries as practising engineers. 1,324 participants were validated among 1,477 participants. 13 fields were selected and used in the survey. Those were; 1) Mathematical statistics, 2) Computer, 3) Purchase, 4) Production system, 5) Logistics, 6) Marketing, 7) Monetary, 8) Experiment methods, 9) Operations Research (OR), 10) Human Factors, 11) Quality, 12) Engineering management, and 13) Information systems. Using the 5-scale Likert rating, each education subject was assessed both in terms of its usefulness in practices and the amount it being taught in school. As a result, courses such as motion/time study, linear programming that IE has traditionally focused showed less usefulness in practices while it is taught in relatively large amount in schools. However, courses such as 6 sigma, CRM which are closely related to industrial practices showed high usefulness in practices compared with low degree of teaching in school. This was the first ever large scalesurvey conducted for IE graduates in Korea. The result of survey displayed many helpful information on current status and future direction of IE education in Korea.
A Case Study of the Design of the Decision Support System for Make-to-order Type Manufacturers
Park, Jae-Young ; Moon, Il-Kyeong ;
IE interfaces, volume 20, issue 1, 2007, Pages 11~20
This case study aims to embody the requirement of the make-to-order type manufacturer who wants to manage risks effectively when decisions are required to be taken under a risk. First, we present a method for choosing the risk factors that should be controlled for the make-to-order type manufacturer. Subsequently, those factors have been verified using statistical methods such as the ANOVA test. The process flows to be operated with the selected risk factors and the rules for an early warning system have been proposed. For a couple of factors, a prototype system has been developed to illustrate actual applications. Applications of the technique developed here for other types of manufacturers might be an interesting research problem.
A Simulation Study for Detailed Design of A-Mart Logistics Center for General Products
Jeon, Byoung-Hack ; Jang, Seong-Young ;
IE interfaces, volume 20, issue 1, 2007, Pages 21~32
This paper deals with the simulation model for A-Mart logistic center design and operations. In developed simulation model, receiving docks, conveyor sorter, conveyor system, shipping docks, material handling devices and manual sorting stations are considered. Three types of cargo such as transfer center cargo, distribution center cargo and supermarket cargo are considered. The simulation model and process animation are developed using the simulation package ARENA. Among various design and operation alternatives consisting of the number of workers of receiving dock, allocation of receiving docks by cargo types, conveyor sorter velocity, the number of folk-lift, the number of manual sorting operators and overall layout, the best alternatives of each subsystem are selected by simulation analysis. The major performance measures such as sorter throughput, utilization of operators at each station, receiving docks utilization and folk-lift utilization are considered for the alternative evaluation.
Scheduling of Shipyard Sub-assembly Process using Genetic Algorithms
Bae, Hee-Chul ; Park, Kyung-Cheol ; Cha, Byung-Chul ; Moon, Il-Kyeong ;
IE interfaces, volume 20, issue 1, 2007, Pages 33~40
In this paper, we consider a scheduling problem of shipyard sub-assembly process. We introduce a skid conveyor system in a shipbuilding company. We develop a mathematical model and a genetic algorithm for shipyard sub-assembly process. The objective of the scheduling is to minimize the makespan which is the final completion time of all jobs. Numerical experiments show that the genetic algorithm performs efficiently.
Selection of Important Variables in the Classification Model for Successful Flight Training
Lee, Sang-Heon ; Lee, Sun-Doo ;
IE interfaces, volume 20, issue 1, 2007, Pages 41~48
The main purpose of this paper is cost reduction in absurd pilot positive expense and human accident prevention which is caused by in the pilot selection process. We use classification models such as logistic regression, decision tree, and neural network based on aptitude test results of 505 ROK Air Force applicants in 2001~2004. First, we determine the reliability and propriety against the aptitude test system which has been improved. Based on this conference flight simulator test item was compared to the new aptitude test item in order to make additional yes or no decision from different models in terms of classification accuracy, ROC and Response Threshold side. Decision tree was selected as the most efficient for each sequential flight training result and the last flight training results predict excellent. Therefore, we propose that the standard of pilot selection be adopted by the decision tree and it presents in the aptitude test item which is new a conference flight simulator test.
Designing a Horizontal Yard Layout in Port Container Terminals Using Simulation
Jeon, Su-Min ; Kim, Kap-Hwan ; Ryu, Kwang-Ryel ;
IE interfaces, volume 20, issue 1, 2007, Pages 49~57
The design of the container stacking yard influences significantly the productivity of handling operations in port container terminals. This study proposes methods for determining specifications of the yard considering the travel distance of vehicles and the storage capacity of yards. For a given length and width of a yard, it is discussed how to determine the layout and the dimension of yard blocks. The alternatives of the yard layout are evaluated by using a simulation study.
Decision Problems for the Design and Operations of Sludge Collection System
Choi, Gyung-Hyun ; Kwak, Ho-Mahn ; Yu, Young-Sun ; Cho, Joong-Mou ;
IE interfaces, volume 20, issue 1, 2007, Pages 58~68
This research deals with a vehicle scheduling problem for the sludge collection strategies which might be solved via quantitative analysis and cost evaluations schemes. This problem can be modeled as a kind of capacitated vehicle routing pick-up problems. With the aim of establishing operation schedule of vehicles and analyzing the total cost under considering various assumptions and realistic restrictions of the sludge collection problem, we propose a heuristic method based on the genetic algorithm in conjunction with the sweep algorithm and the 4-opt algorithm. Finally, we present the cost effective operation schedule that can be used as the managing tool for the sludge treatment plant of the multi-purpose dam.
An Empirical Study on RFID Application to the Container Terminal Gate Management System
Jang, Kyoung-Yeol ; Lee, Chung-Hoon ; Kim, Jae-Gon ; Lim, Seung-Kil ; Yoo, Woo-Sik ;
IE interfaces, volume 20, issue 1, 2007, Pages 69~78
We conduct an empirical study on RFID application to a real container terminal gate. The objective of this study is three-fold. The first is to design a new gate management process that applies RFID technology. For this purpose, we analyze current gate management process to find opportunities for improvement. The second is to verify the 433 and 900 MHz RFID technology in terms of the recognition rate of information contained in RFID tag under various conditions such as the speed of vehicle, the position of RFID tag and the tilt of RFID reader. We perform some experimental tests for this verification. Finally, we try to find suitable conditions for the speed of vehicle, the position of RFID tag and the tilt of RFID tag reader based on results of the experimental tests. Those findings are obtained with some ANOVA tests. Additionally, we summarize anticipated issues when applying RFID technology to the gate management process and possible solutions for the issues.
Petri Net-based Process Modeling for B2B e-Commerce
Kim, Sun-Ho ;
IE interfaces, volume 20, issue 1, 2007, Pages 79~86
In B2B e-commerce environments, many initiatives for process modeling have made efforts to design business processes correctly. Especially, Petri nets have been widely used as a good theory to design and verify process models. Therefore, we propose the process modeling method for the B2B e-commerce based on Petri nets. First of all, a B2B process model based on BPSS is represented by the UML activity diagram. Second, the activity diagram is transformed to a Petri net model. For the transformation, well-behaved building blocks/control structures and the modeling rules for inter-organizational workflow processes are proposed. Third, the process is partitioned into sharable processes for individual business partners. Finally, according to needs of individual business partners, the sharable processes are modified by well-structured refinement rules. The whole procedure is explained with the purchase process of an e-bookstore.
Burn-in Considering a Trade-Off of Yield and Reliability
Kim, Kyung-Mee ;
IE interfaces, volume 20, issue 1, 2007, Pages 87~93
Burn-in is an engineering method for screening out products containing reliability defects which would cause early failures in field operation. Previously, various burn-in models have been proposed mainly focused on the trade-off of shop repair cost and warranty cost ignoring manufacturing yield. From the view point of a manufacturer, however, burn-in decreases warranty cost at the expense of yield reduction. In this paper, we provide a general model quantifying a trade-off between product yield and reliability, in which any defect distribution from previous yield models can be used. A profit function is expressed in burn-in environments for determining an optimal burn-in time. Finally, the method is illustrated with gate oxide failures which is an important reliability concerns for VLSI CMOS circuits.