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유재국 ( Jae Kook Yu ),곽상만 ( Sang Man Kwak ) 한국시스템다이내믹스학회 2005 한국시스템다이내믹스 연구 Vol.6 No.2
The purpose of this study is to analyze the structure of renewable energy market in order to deploy more renewable energy in Korea on the basis of information asymmetry between suppliers and demanders. To attain this purpose we develop the model to analyze and simulate the renewable market using system dynamics. This model is developed not to forecast the accurate size of market but to learn more structure of market using our limited data, mental model and knowledge of market.
Agent Based Modeling 기법을 활용한 시스템다이내믹스 모델링
전소연 ( So Yun Jeon ),이혜준 ( Hye Jun Lee ),곽상만 ( Sang Man Kwak ) 한국시스템다이내믹스학회 2006 한국시스템다이내믹스 연구 Vol.7 No.1
A system dynamics model is developed to investigate the applicability of the agent based modeling concept in the system dynamics model. The assumed problem is to forecast the size and structure of the organization with the developing market environment. The agent based modeling concept is applied to the organization part, and the other parts of the model such as market, facilities, etc. are developed with the traditional system dynamics technique. The simulation results show the agent based modeling part can be combined with the traditional system dynamics modeling with more precisions. However, the complexity increases and the simulation times are longer than those of the traditional method.
이용석 ( Yong Suk Lee ),이근준 ( Geun Joon Lee ),곽상만 ( Sang Man Kwak ) 한국시스템다이내믹스학회 2006 한국시스템다이내믹스 연구 Vol.7 No.1
A series of system dynamics model was developed for forecasting demand and supply of human resource in the electricity industry. To forecast demand of human resource in the electric power industry, BLS (Bureau of Labor Statistics) methodology was used. To forecast supply of human resource in the electric power industry, forecasting on the population of our country and the number of students in the department of electrical engineering were performed. After performing computer simulation with developed system dynamics model, it is discovered that the shortage of human resource in the electric power industry will be 3,000 persons per year from 2006 to 2015, and more than a double of current budget is required to overcome this shortage of human resource.
BSC기반의 중소병원 경영성과예측 시스템다이내믹스 모델개발
정희태 ( Hee Tae Chung ),김윤신 ( Yoon Sin Kim ),곽상만 ( Sang Man Kwak ),이용균 ( Yong Kyoon Lee ) 한국시스템다이내믹스학회 2007 한국시스템다이내믹스 연구 Vol.8 No.2
Recently, balanced scorecard is widely used in the public sector as well as in the private sector. Balanced scorecard system of a particular hospital is a very useful tool in the sense that it shows various measures for the management including the traditional financial measures. However, since it does not show the impact of action items, managers have to analyze his potential decisions. On the other hand, a system dynamics model for the management of a hospital can be used to predict future management status. In this paper, a balanced scorecard system with a system dynamics model is developed for a small sized hospital, and the feasibility and applicability of the system have been tested. It turns out the combination of the balanced scorecard and system dynamics technique can be comprised each other. The balanced scorecard system can take advantage of the data forecasted by the system dynamics model including the implementation of action items taken today. On the other hand, the key performance indicators and action items from the balanced scorecard system provide guidelines the scope and direction of the system dynamics model. The additional efforts of developing a system dynamics model are well compensated by the additional colorful functionalities of the system. This paper also covers the future research areas for the combined system to be more effectively developed.
만성 B형간염환자의 재발 방지 및 삶의 질 향상을 위한 시스템 다이내믹스 모델 개발
백승운 ( Seung Woon Paik ),최은옥 ( Eun Ok Choi ),김금순 ( Keum Soon Kim ),이명선 ( Myung Sun Yi ),곽상만 ( Sang Man Kwak ) 한국시스템다이내믹스학회 2006 한국시스템다이내믹스 연구 Vol.7 No.2
A conceptual system dynamics model is developed to represent the dynamic mechanism between the number of hepatitis B virus and the defense system of the body. The simulation results shows that the model behaves within the reasonable ranges. The developed conceptual model is a first attempt to quantify the dynamic mechanisms of the hepatitis B virus, where only feedback structures are considered without bio-organism data. The next step would be to incorporate the model with bio-organism theory and to carry out case studies to identify personal characteristics. Since the current model is a conceptual model where quantitative results are not based on the sound background, the usage is limited only within the qualitative basis. It could be a effective educational tool for the patients. It also shows what-to-do lists in order to be used for forecast purposes. * This study was funded by "the Korea Research Foundation Grant" (KRF-2004-042-E00147) in 2004.