• 경영과학
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• 제30권1호
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• pp.139-148
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• 2013

A nuclear energy has been one of the most important sources to securely supply electricity in South Korea. Its weight in the national electricity supply has kept increasing since the first nuclear reactor was built in 1978. The country relies on the nuclear approximately 31.4% in 2012 and it is expected to increase to 48.5% in 2024 based on the long-term electricity supply plan announced by the Korean government. However, Fukushima disaster due to 9.0 magnitude earthquake followed by the tsunami has raised deep concerns on the security of the nuclear power plants. The policy makers of the country are much interested in analyzing the cost structure of the power supply in the case that the nuclear is diminished from the current supply portion. This research uses a stochastic model that aims to evaluate the long-term power supply plan and provides an extensive cost analysis on the changes of the nuclear power supply. To evaluate a power supply plan, the research develops a few plausible energy mix scenarios by changing the installed capacities of energy sources from the long-term electricity supply plan. The analyses show that the nuclear is still the most attractive energy source since its fuel cost is very much stable compared to the other sources. Also the results demonstrate that a large amount of financial expenditure is additionally required every year if Koreans agree on the reduction of nuclear to increase national security against a nuclear disaster.

• 경영과정보연구
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• 제4권
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• pp.501-527
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• 2000

This plan is referred about linking the department of data processing at Pusan commercial high school with the faculty of management information at Kyungnam Junior College of Information & Technology. The purpose of this plan is educating students at knowledge and skill which reflected changed through development of information technology during the last decade effectively and woke them have ability of good management of future. The effect of this plan is a protection the extravagance by mutual overlaping the quality of education and inspiration the student's will to study by organization education. This research is performed by the purpose of orgarnizing & lingking curriculums and developing plan of management. After mutual comparise and analyze the 1999's curriculm of the department of data prove ssing at pusan commercial high school and the faculty of management information at Kyungnam Junior College of Information & Technology, and receive the holding processor's opinion that based on the aim of management information and direction of employment guidance. The model of curriculum is established like this table. Prepared curriculum model is prepared like this.

• 경영정보학연구
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• 제7권2호
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• pp.141-162
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• 2005

본 연구에서는 보다 효율적이고 지능적으로 운영될 수 있는 미래형 우편접수창구를 구축하기 위한 계획을 수립한다. 현황분석을 위해 우선 사용자의 요구사항을 정의하고 현행 문제점과 각종 이슈를 분석하며, 선진국의 다양한 우편서비스 제공기관에 대한 선진사례분석을 수행한다. 선행된 현황분석과 선진사례분석 결과를 기반으로 미래형 우편접수창구에 대한 기념적 모형을 설계한다. 제안된 모형은 무인우편창구, 다량우편창구, 통합우편창구로 대별할 수 있으며, 비효율과 부정확성을 제거하기 위해 정보기술과 자동화기술을 적용함으로써 우편접수 업무가 보다 효율적으로 수행될 수 있도록 설계되었다. 이후 제안된 개념적 모형의 구축을 위한 추진과제를 정의하고, 개별과제에 대한 실행우선순위를 결정하기 위해 현업담당자와 관련 전문가의 설문을 통해 과제들의 중요도와 선후행관계를 평가한 후, 최종적으로 우편접수창구에 대한 구축계획을 수립하였다. 본 연구에서 제시된 구축계획을 바탕으로 향후 보다 효율적이고 효과적인 우편접수창구를 구축할 수 있을 것으로 기대한다.

• 산업경영시스템학회지
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• 제42권2호
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• pp.9-17
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• 2019

In order to deal with high uncertainty and variability in emergency medical centers, many researchers have developed various models for their operational planning and scheduling. However, most of the models just provide static plans without any risk measures as their results, and thus the users often lose the opportunity to analyze how much risk the patients have, whether the plan is still implementable or how the plan should be changed when an unexpected event happens. In this study, we construct a simulation model combined with a risk-based planning and scheduling module designed by Simio LLC. In addition to static schedules, it provides possibility of treatment delay for each patient as a risk measure, and updates the schedule to avoid the risk when it is needed. By using the simulation model, the users can experiment various scenarios in operations quickly, and also can make a decision not based on their past experience or intuition but based on scientific estimation of risks even in urgent situations. An example of such an operational decision making process is demonstrated for a real mid-size emergency medical center located in Seoul, Republic of Korea. The model is designed for temporal short-term planning especially, but it can be expanded for long-term planning also with some appropriate adjustments.

• 품질경영학회지
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• 제21권1호
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• pp.65-77
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• 1993

Often in a production process, the quality of items is serially dependent. We assume that the quality of items is an attribute which can be classified as good or bad with a Markovian dependence structure. In order to determine sampling inspection plan characteristics such as total inspection cost and average outgoing quality, we design an economic model and illustrate an efficient procedure for design of best inspection plan using graphs based on numerical calculations.

• 한국건설관리학회논문집
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• 제2권4호
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• pp.48-61
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• 2001

본 연구에서는 작업 신뢰도 향상의 한 방안으로 기존 공정 관리 기법 상의 한계점을 분석하여 이를 보완하고자 하였다. 그 결과로써 린 생산 원리를 적용한 건설 생산 공정 개선 모델인 CPAM(Construction Process Analysis Model)을 제시하였다. CPAM의 변이 관리 기법을 통해 작업 변이를 최소화시켜 공정계획의 신뢰도 향상 및 생산 효율을 증대시킬 수 있도록 하였고 CPAM에서 제시된 세부작업 일정 계획과 주간작업계획을 통해 건설 현장의 작업 흐름에서 나타날 수 있는 자재, 장비, 인력등의 재고(Inventory or Work In Process, WIP)를 감소시킬 수 있도록 하였다. 또한 본 연구는 건설 생산을 작업 흐름의 관점으로 분석함으로써 기존의 분석에서 놓치기 쉬운 작업 흐름상에서의 불확실성을 최소화시키고 작업 처리량을 최대화시킬 수 있는 대안을 제시하는 데 그 의의가 있다.

• 산업공학
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• 제17권4호
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• pp.472-481
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• 2004

In this paper, we propose a linear programming model of supply planning process for the supply chain collaboration strategy of a company. The amount of its supplying quantity relies on outsourcing suppliers heavily. Conversely, the revenues of those suppliers are highly dependent on the supplying quota from the supply network planning of the company. In order to keep the supply stable through collaboration, the company builds such a policy to guarantee the fairness on revenue between the supplies. For this, the supply network plan should keep the capacity utilization ratio even for all the suppliers. But the production capacities are different and the distribution of molds is disproportional through suppliers, so the supply network plan is not easily established with simple arithmetic processes. Therefore, we developed the linear programming model with those target function and constraints minimizing the costs for holding inventory and penalty of delayed delivery, simultaneously guaranteeing the even capacity utilization through suppliers. The proposed model has been applied to real case and the evaluation for the planning result from the model would be followed in order to make sure that our model guarantee on extracting the supply network plan subordinated to the policy. Also we mention about further studies for improvement of the model.

• 한국의학물리학회지:의학물리
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• 제30권4호
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• pp.94-103
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• 2019

Purpose: To evaluate the clinical feasibility of knowledge-based planning (KBP) for volumetric-modulated arc radiotherapy (VMAT) in spine stereotactic body radiotherapy (SBRT). Methods: Forty-eight VMAT plans for spine SBRT was studied. Two planning target volumes (PTVs) were defined for simultaneous integrated boost: PTV for boost (PTV-B: 27 Gy/3fractions) and PTV elective (PTV-E: 24 Gy/3fractions). The expert VMAT plans were manually generated by experienced planners. Twenty-six plans were used to train the KBP model using Varian RapidPlan. With the trained KBP model each KBP plan was automatically generated by an individual with little experience and compared with the expert plan (closed-loop validation). Twenty-two plans that had not been used for KBP model training were also compared with the KBP results (open-loop validation). Results: Although the minimal dose of PTV-B and PTV-E was lower and the maximal dose was higher than those of the expert plan, the difference was no larger than 0.7 Gy. In the closed-loop validation, D_1.2cc, D_0.35cc, and D_mean of the spinal cord was decreased by 0.9 Gy, 0.6 Gy, and 0.9 Gy, respectively, in the KBP plans (P<0.05). In the open-loop validation, only D_mean of the spinal cord was significantly decreased, by 0.5 Gy (P<0.05). Conclusions: The dose coverage and uniformity for PTV was slightly worse in the KBP for spine SBRT while the dose to the spinal cord was reduced, but the differences were small. Thus, inexperienced planners could easily generate a clinically feasible plan for spine SBRT by using KBP.

• 한국문헌정보학회지
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• 제43권4호
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• pp.5-27
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• 2009

2008년 8월 대통령 소속의 도서관정보정책위원회는 "도서관발전종합계획"에서 '국가 지식정보 활용을 위한 국가도서관 체계 재정립'의 구체적인 추진과제의 하나로 국가를 대표하는 주제별 전문도서관(과학기술, 농학, 의학, 법률, 환경) 건립 등을 제시하였다. 이에 본 연구는 예비연구로 수행한 '주요 국가의 주제별 국가도서관 체계 및 격차 분석'에 기반하여 국가도서관의 주제별 체계화 모형(국립중앙도서관 중심의 집중형 체계화, 수평적 연계형 체계화, 중장기 전략형 체계화)을 정밀 검토하고 바람직한 방안을 제안하였다.

• 한국CDE학회논문집
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• 제17권2호
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• pp.111-122
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• 2012

Capacity planning plays an important role not only for master production plan but also for facility or layout design in shipbuilding. Product work breakdown structure, attributes of production resources, and production method or process data are associated in order to make the discrete event simulation model of shipyard layout plan. The production amount of each process and the process time is assumed to be stochastic. Based on the stochastic discrete event simulation model, the production capacity of each facility in shipyard is estimated. The stochastic model of product arrival time, process time and transferring time is introduced for each process. Also, the production capacity is estimated for the assumed master production schedule.