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손재동 대한산업공학회 2011 산업공학 Vol.24 No.4
This paper presents a discrete time optimal asset buying problem with a predetermined final deadline where an available budget is limited. A cost is paid to search for assets, called the search cost. A seller who shows up offers a price for the asset, and then the buyer decides whether or not to buy the asset by comparing the offered price to his optimal selection threshold. When the budget becomes less than the search cost or the price of the asset, the buyer can get a necessary loan with some interests. We clarify the properties of the buyer's optimal selection threshold in order to maximize the expected value of budget which is left after paying all the search costs and the price of the asset at that point in time.
고객 도착률이 시스템 상태에 의존하는 개별주문 생산시스템의 최적 선별수주 문제
손재동 ( Jae Dong Son ) 한국경영공학회 2011 한국경영공학회지 Vol.16 No.1
This paper deals with a discrete-time admission control problem in a customized production system with state-dependent arrival rates. For sequentially arriving customer order the decision maker should decide on whether to admit it or not. The admitted customer order is completed with a probability in the next point in time. A cost is paid to search for customer orders, which called the search cost. In the context of search cost, the decision maker has an option whether to conduct the search or not. In the paper, we examine the properties of both optimal admission and optimal search policies to maximize the total expected profit. We show that the optimal admission policies have a concave unimodal property in the number of customer orders if customer arrival rate decreases.
복수의 서버를 보유한 서비스 회사의 부업이익을 고려한 전략적 고객선별 스위치 모델
손재동 ( Jae Dong Son ) 한국경영공학회 2011 한국경영공학회지 Vol.16 No.3
This paper presents the problem of selecting profitable customer orders sequentially arriving at service providing companies with multiple servers in which two types of services are provided. The first class of service is designed to meet the particular needs of customers, and for the customer asking for this service the decision maker makes a decision on which policy to employ between admission control and pricing control policies. Under former policy he decides whether to accept or to reject the order for the service, whereas under latter policy he decides a price of the order and offers it to an arriving customer. The second class of service is provided as a sideline, which prevents servers being idle when the number of customer orders is less than the number of servers. This yields the sideline profit. We clarify the properties of the switching strategy between the admission control and pricing control policies with relation to the sideline profits. In particular, we show that when the sideline is sufficiently large, there may exist multiple switching thresholds with respect to the number of customer orders in the system.
박재동 ( Park Jae Dong ),이홍우 ( Lee Hong U ),안광준 ( An Gwang Jun ),김석배 ( Kim Suk Bae ),박학열 ( Park Hag Yeol ),손경락 ( Son Gyeong Lag ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.10
Congenital cystic adenomatoid malformation of the lung (CCAM) is a rare benign pulmonary lesion characterized by abnormal overgrowth of the fetal bronchiole. The prenatal diagnosis of CCAM is important because the prognosis of the CCAM is depend on the ty
위험성향을 고려한 자산매각문제 유형별 의사결정 패턴의 비교 분석에 관한 실증 연구
이종빈,손재동 한국경영공학회 2015 한국경영공학회지 Vol.20 No.4
Suppose that someone needs to sell a building by a certain date in the future because of the emigration or studying abroad, etc. Then he/she are faced with a decision problem of when and how to accept the price offered by a potential buyer. This kind of problem is referred to as assets selling problem(ASP). This paper deals with the following three types of ASP model; 1) with only discount factor, 2) with discount factor and search cost, and 3) with discount factor, search cost, and recall with reservation cost. With respect to these three types of ASP, the experimental games are developed by Java. By use of the game, the various decision patterns in ASP are analyzed. In addition, the influence of decision maker’s risk attitude on the decision making in ASP is investigated as well.
땡처리 항공권 출현 여부를 고려한 최적 항공권 구매 전략
문경배,박희정,손재동 한국경영과학회 2019 한국경영과학회지 Vol.44 No.2
This research deals with the optimal airline-ticket purchase problem in which the buyer should make a decision on whether or not to buy sequentially appearing airline-tickets in consideration of the appearing possibility of clearance (or promotion) leading to a given deadline. We formulate this problem as a mathematical model and prove the monotonic property of the optimal decision rules with respect to clearance ticket price. Specifically, we show how the double-critical value (DRV) property may lead to two optimal thresholds when the appearing probability of clearance tickets decreases relative to the remaining time nearing the deadline. In addition, we demonstrate the effectiveness of the model with empirical analysis by using real data and game experiments.