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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Institute of Industrial Engineers
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Korean Institute of Industrial Engineers
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Volume & Issues
Volume 36, Issue 4 - Dec 2010
Volume 36, Issue 3 - Sep 2010
Volume 36, Issue 2 - Jun 2010
Volume 36, Issue 1 - Mar 2010
Selecting the target year
New Criteria for the Consistency in Reasonable Pairwise Comparison Matrices
Kim, Jae-Bum ; Cho, Yong-Gon ; Kim, Yun-Bae ; Cho, Keun-Tae ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 1~6
The Analytic Hierarchy Process (AHP) has been applied widely in various decision making fields. One of advantages of the AHP is the consistency test. However, it has several problems such as the limit of its concept, the limit of 9 scales and stern criteria, contradictory pairwise comparison. In this paper, we propose new criteria for the consistency with more realistic and ideal conditions. To derive the criteria, we conduct the simulation and use the bootstrap method, which is one of resampling techniques in the simulation area.
A Dynamic Lot-Sizing Problem with Backlogging for Minimum Replenishment Policy
Hwang, Hark-Chin ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 7~12
This paper considers a dynamic lot-sizing problem with backlogging under a minimum replenishment policy. For general concave production costs, we propose an O(
) dynamic programming algorithm. If speculative motive is not allowed, in this case, a more efficient O(
) algorithm is developed.
A Data Mining Procedure for Unbalanced Binary Classification
Jung, Han-Na ; Lee, Jeong-Hwa ; Jun, Chi-Hyuck ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 13~21
The prediction of contract cancellation of customers is essential in insurance companies but it is a difficult problem because the customer database is large and the target or cancelled customers are a small proportion of the database. This paper proposes a new data mining approach to the binary classification by handling a large-scale unbalanced data. Over-sampling, clustering, regularized logistic regression and boosting are also incorporated in the proposed approach. The proposed approach was applied to a real data set in the area of insurance and the results were compared with some other classification techniques.
Development and Application of Technology Modular Alternatives Setting Model for Evaluating R&D Project Effectively
Kwon, Cheol-Shin ; Kim, Ki-Chan ; Ahn, Ki-Hyun ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 22~31
In R&D project evaluation, we consider the technical couple. And we set technology modular alternatives, after evaluating technical group based on technical couple. So we solve the problem extracted from existing research of R&D project evaluation. We use Conjoint Analysis(CA) for this research. CA is usually used for confirming customers' preference. However we use it for researchers' preference in the side of technology. This research is followed by the next 4 steps. (1) Hierarchical model of goal technology (2) Composition model of modular alternatives (3) Evaluation model of modular alternatives (4) Setting model of technology modular alternatives.
Method of Benchmarking Route Choice Based on the Input-similarity Using DEA and SOM
Park, Jae-Hun ; Bae, Hye-Rim ; Lim, Sung-Mook ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 32~41
DEA(Data Envelopment Analysis) is the relative efficiency measure among homogeneous DMU(Decision- Making Units) which can be used to useful tool to improve performance through efficiency evaluation and benchmarking. However, the general case of DEA was considered as unrealistic since it consists a benchmarking regardless of DMU characteristic by input and output elements and the high efficiency gap in benchmarking for inefficient DMU. To solve this problem, stratification method for benchmarking was suggested, but simply presented benchmarking path in repeatedly applying level. In this paper, we suggest a new method that inefficient DMU can choice the optimal path to benchmark the most efficient DMU base on the similarity among the input elements. For this, we propose a route choice method that combined a stratification benchmarking algorithm and SOM (Self-Organizing Map). An implementation on real environment is also presented.
Hexagonal Material Flow Pattern for Next Generation Semiconductor Fabrication
Chung, Jae-Woo ; Suh, Jung-Dae ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 42~51
The semiconductor industry is highly capital and technology intensive. Technology advancement on circuit design and process improvement requires chip makers continuously to invest a new fabrication facility that costs more than 3 billion US dollars. Especially major semiconductor companies recently started to discuss 450mm fabrication substituting existing 300mm fabrication of which facilities were initiated to build in 1998. If the plan is consolidated, the yield of 450mm facility would be more than doubled compared to existing 300mm facility. In steps of this important investment, facility layout has been acknowledged as one of the most important factors to be competitive in the market. This research proposes a new concept of semiconductor facility layout using hexagonal floor plan and its compatible material flow pattern. The main objective of this proposal is to improve the productivity of the unified layout that has been popularly used to build existing facilities. In this research, practical characteristics of the semiconductor fabrication are taken into account to develop a new layout alternative based on the analysis of Chung and Tanchoco (2009). The performance of the proposed layout alternative is analyzed using computer simulation and the results show that the new layout alternative outperforms the existing layout alternative, unified layout. However, a few questions on space efficiency to the new alternative were raised in communication with industry practitioners. These questions are left for a future study.
Menu Layout for Touch-screen Phones Based on Various Grip Postures
Cho, Sung-Il ; Park, Sung-Joon ; Jung, Eui-S. ; Im, Young-Jae ; Choe, Jea-Ho ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 52~58
The level of competition has reached the limits in cellular phone market and the cellular phone manufacture companies started to focus their solution in user interface. Design issues with controllability led the development and renovation of such products to the use of the touch-screen phone. Depending upon the readability, technical advances, portability and controllability, user satisfaction of touch-screen phones could vary significantly. In this research, the controllability was dealt in regard to various grip postures, in order to improve menu layout which fits for using the thumbs of both hands and a thumbs of single hand. Regression models are found to the suggest the location of buttons on the screen by redesigning the menu layout, it is expected to improve both controllability and satisfaction of the user. This result can be applicable not only to mobile phone design, but also to the design of various hand-held devices using a touch screen.
The Composite Crowding Index for the Medical Emergency Department
Lee, Young-Hoon ; Kim, Jeong-Woo ; Lee, Yoon-Ho ; Kim, Seung-Ho ; Park, Yoo-Seok ; Park, In-Cheol ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 59~68
The medical emergency departments are suffering from the crowdness of patients, hence the quality of medical service the patients are receiving are getting poorer. Overcrowding of medical emergency departments may incur the waiting time for the treatment, and the improper treatment in time. For the operational control of the emergency department, the crowding index is commonly used to identify the crowding intensity, with which the operation process is managed, and future process can be expected. In this study the composite crowding index is suggested, in which the trend of inpatients rate, the age and acuity of patients, and resource of ED are considered. The validity of the suggested crowding index is discussed by the regression analysis for the index and the actual number of inpatients, and by the simulation study using the process model and the real data.
Failure Rate Model of External Environment Maintenance for a System under Severe Environment
Park, J.H. ; Shin, Y.J. ; Lee, S.C. ; Lie, C.H. ;
Journal of Korean Institute of Industrial Engineers, volume 36, issue 1, 2010, Pages 69~77
The failure rate model of External Environment Maintenance(EEM) for a system under severe environment is investigated. EEM, which is recently introduced concept, is a maintenance activity controlling external environment factors that potentially cause system failure such as cleaning equipment, controlling temperature (humidity) and removing dust inside of electronic appliances. EEM can not have any influence on the inherent failure rate of a system but reduce the severity of the external environment causing failure since it deals with only external environment factors. Therefore, we propose two failure rate models to express the improvement effect of EEM: The intensity reduction model and age reduction model. The intensity and age reduction models of EEM are developed assuming the quality of improvement effect is proportioned to an extra intensity or age respectively. The validation of proposed failure rate models is performed in order of data generation, parameter estimation and test for goodness-of-fit.