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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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Journal DOI :
Korean Institute of Industrial Engineers
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Volume & Issues
Volume 35, Issue 4 - Dec 2009
Volume 35, Issue 3 - Sep 2009
Volume 35, Issue 2 - Jun 2009
Volume 35, Issue 1 - Mar 2009
Selecting the target year
Optimal Decisions for the Airline Seat Capacity Allocation Considering Consumer Buying Behavior
Kim, Sang-Won ;
Journal of Korean Institute of Industrial Engineers, volume 35, issue 3, 2009, Pages 185~193
We consider a two-fare, two-period airline seat capacity allocation problem where consumers may choose different options in purchasing an airline ticket. A consumer may decide to wait for reopening of the same fare class ticket which is originally intended to buy, or may buy a different fare class ticket within the same period, if the originally requested fare is unavailable. We investigate the impact of the consumer buying behavior on the optimal solutions and the expected revenue.
Minimization of Inspection Cost in an Inspection System Using a Time-based Flow Analysis
Yang, Moon-Hee ; Kim, Sun-Uk ;
Journal of Korean Institute of Industrial Engineers, volume 35, issue 3, 2009, Pages 194~202
In this paper, we address an optimization problem and a case study for minimizing the cost of inspections incurred throughout an inspection system, which includes a K-stage inspection system, a source inspection shop, and a re-inspection shop. In order to formulate the inspection cost function, we make a time-based flow analysis between nodes (or shops), and derive the limiting sizes of flows between nodes and limiting defective rates by solving a set of nonlinear balance equations. It turns out that the number of items reworked throughout the inspection system is invariant irrespective of the defective rate of items moved through the K-stage inspection system. Hence we define the inspection cost as the total number of items inspected, and we provide an enumeration method for determining an optimal value of K which minimizes the number of items inspected.
Quantifying the Bullwhip Effect in a Supply Chain Considering Seasonal Demand
Cho, Dong-Won ; Lee, Young-Hae ;
Journal of Korean Institute of Industrial Engineers, volume 35, issue 3, 2009, Pages 203~212
The bullwhip effect refers to the phenomenon where demand variability is amplified when one moves upward a supply chain. In this paper, we exactly quantify the bullwhip effect for cases of seasonal demand processes in a two-echelon supply chain with a single retailer and a single supplier. In most of the previous research, some measures of performance for the bullwhip effect are developed for cases of non-seasonal demand processes. The retailer performs demand forecast with a multiplicative seasonal mixed model by using the minimum mean square error forecasting technique and employs a base stock policy. With the developed bullwhip effect measure, we investigate the impact of seasonal factor on the bullwhip effect. Then, we prove that seasonal factor plays an important role on the occurrence of the bullwhip effect.
A Note on Online Scheduling Problem of Three and Four Machines Under General Eligibility
Park, Jong-Ho ; Chang, Soo-Y. ; Lim, Kyung-Kuk ;
Journal of Korean Institute of Industrial Engineers, volume 35, issue 3, 2009, Pages 213~217
We consider the online scheduling problems of three and four machines under eligibility constraint. Respectively for the cases of three and four machines, we prove that AW algorithm has competitive ratios of
and 3 which are shown to be optimal. Also, we show that the same results hold for the semi-online cases with prior knowledge of the total and the largest processing time.