• Journal of Korean Society of Transportation
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• v.18 no.1
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• pp.7-15
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• 2000

물류에서는 재화 또는 정보의 흐름이 매우 중요하다. 그 동안 우리나라에서는 물류시스템을 물리적인 시설로 간주 시설의 공급에만 관심을 기울여 왔다. 그 결과 물류활동을 지원할 수 있을 만한 정보시스템의 구축이 충분히 이루어지지 못하였다. 본 연구에서는 화물운송을 위주로 한 화물유통체계의 합리화 방안을 모색하기 위하여 교통부분과 밀접한 연계를 갖는 첨단화물운송체계의 도입효과를 논의하고 Life-Cycle Cost의 개념을 이용하여 첨단화물운송체계의 시스템 대안을 평가하였다. 분석결과 노변 통신시스템을 이용한 시스템의 구성이 중장기적으로 유리한 것으로 평가되었다. 이는 통신비의 부담이 시설의 유지보수비의 부담보다 크기 때문이다. 그러나 노변통신시스템시설은 표준화 등의 문제로 아직 적용에 문제점들이 많으며 낙뢰 등 비용산정에 포함되지 못한 유지보수의 추가비용이 발생할 소지가 크다. 그러므로 교통시설의 특징에 따라 두 접근방식을 혼용하는 방안이 검토되어야 한다.

• Journal of the Korean Society of Safety
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• v.24 no.2
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• pp.62-68
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• 2009

Life Cycle Cost(LCC) is adopted to decide the target of safety level in designing suspension bridges. The LCC are evaluated considering two types of uncertainty; aleatory and epistemic. The nine alternative designs of suspension bridge are simulated to decide the safety level which can minimize the LCC. The LCC is calculated through the probability of failure and safety index including the uncertainty. This method results in the useful tool deciding the optimum safety level with minimal LCC as the main design factor.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.272-273
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• 2017

As businesses put a greater emphasis on outward appearances, the demand for external window cleaning has been on the rise. However, with the conventional labor-intensive window cleaning method, it is hard to meet this demand. Therefore, this study proposes a Life Cycle Cost (LCC) analysis model for a guiderail-type cleaning robot, and estimate the LCCs of the conventional method and the cleaning robot. The findings of this research are expected to serve as a guide for future development of a cleaning robot.

• Journal of Korean Society for Quality Management
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• v.41 no.3
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• pp.413-421
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• 2013

Purpose: System availability and life cycle cost are often used to evaluate the system performance and is influenced by the operation and maintenance characteristic. In this paper, we propose the method to improve life cycle cost and satisfy the target availability through redundancy allocation. Methods: We consider the redundancy is available at all items in multi level system. Thus, we assume that sub-assembly, module, components can be duplicated. Simulation and genetic algorithm are employed to optimize redundancy allocation. Results: Target availability is higher, the life cycle cost is increased. In addition, the items for redundancy are selected at higher level in multi level system if target availability is higher. Conclusion: We could know that target availability affects the duplication number of items and the selection of redundancy items. For further study, we will consider new optimization algorithms to compare with the proposed GA algorithm and improve optimization performance.

• Proceedings of the KIEE Conference
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• 1999.07e
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• pp.2031-2034
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• 1999

현재 우리나라에서는 도로망의 급속한 확충에 따라 터널의 수가 급속히 증가하고 있다. 터널은 운전자들이 주야간으로 안전하고 쾌적하게 주행할 수 있도록 설계되어야 한다. 이런 관점에서 터널의 조명설계는 매우 중요하다고 할 수 있으며, 터널의 안전성, 쾌적성, 경제성을 확보하기 위한 여러 가지 복합적인 요소들을 고려한 분석이 필요하다. 이 논문에서는 터널조명에 일반적으로 사용되고 있는 저압나트륨등에 대하여 대안으로 대두되고 있는 형광등에 대한 경제성 측면에서의 비교 방법론 연구를 수행한다. 각각의 등에 대하여 동일 한 터널 노면기준조도를 구현하기 위한 필요 등의 수를 시뮬레이션을 통하여 결정하고, 이를 기반으로 각 터널 조명에 소요되는 Life Cycle Cost를 기본 Model을 통하여 산정하고 비교하는 방법을 제시한다. 이러한 분석은 터널개발 사업의 정책적 결정에 있어 기초 방법과 자료로서 활용될 수 있을 것이다.

• Proceedings of the KIEE Conference
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• summer
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• pp.424-426
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• 2004

As power demand increases gradually, the call for underground transmission system increases. But it is very difficult and high in cost to construct new ducts and/or tunnels for power cables in metropolitan areas. HTS (High Temperature Superconducting) cable has the several useful characteristics such as increased power density, stronger fields and/or reduced losses. Therefore HTS cable can allow more power to be moved in existing ducts, which means very large economical and environmental benefits. In these days, companies world-wide have conducted researches on HTS cable. A development project for a 22.9kV class HTS cable is proceeding at a research center and university in Korea. In this paper, we investigate the expected price of HTS cable to have a merit in viewpoint of economic aspect. First, life-cycle cost of conventional cable is calculated and based on this, the expected price of HTS cable is evaluated, which HTS cable is competitive against conventional cable.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.05a
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• pp.149-150
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• 2012

According to the increase of demand of the deteriorated building. The interest of the building's maintenance is continually increased, so studies about how to increase building's stability & prolonged life span are increased. This study's purpose is to maintain building's function, so we suggest a protocol type system of UI to estimate reasonable planning of demand of repair & replacement and to distribute budget.

• Journal of the military operations research society of Korea
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• v.25 no.2
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• pp.44-61
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• 1999

Cost estimation has posed a significant challenge to estimators, planners, and managers in both government and military. Considerable historical evidence shows that accurate cost estimation has been difficult to achieve across a wide range of projects, including weapon systems. This paper introduces new cost estimating concept, CAIV(Cost As an Independent Variable) and a cost estimating case study using PRICE model, computer aided parametric estimating models(CAPE) for K1 tank cost estimate. CAIV concept is to set realistic but aggressive cost objectives easily in each acquisition program and to achieve cost, schedule, and performance objectives considering various managing risks with a project manager and industry teams. The Price model is one of computer aided cost estimating models and widely used in U.S. defense system analysis as a tool for CAIV. We analyze theories, inputs, outputs of the PRICE model and present a case study for K1 tank to estimate costs in requirement and concept phase, program and budgeting phase, and life cycle phase. Finally we obtain results that the Price model can be used in various phases of PPBEES depending upon available data and time.

• Journal of the Society of Naval Architects of Korea
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• v.42 no.6 s.144
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• pp.673-678
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• 2005

IMO adopted ' International Convention for The Control and Management of Ships' Ballast Water and Sediments ' on February 13th 2004. According to this convention, a ballast water treatment system should be installed in all ships obligatorily up to a standard date. When the system is installed, economic propriety should be considered. The economic propriety analysis examines the profit of a relevant project which can be presented by a equation, (Profit) = (income) - (expense) - (tax). However, the ballast water system is not for the profit during the life cycle but for the satisfaction of the regulation. Therefore, the expense should be minimum against the profit. This study presents the LCC(Life-Cycle Cost) analysis for economic evaluation of several ballast water system of foreign products.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.17 no.6
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• pp.596-604
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• 2005

This paper presents the work on evaluating the LCC (Life-Cycle Cost) of a heat pump system as unutilized energy system. The river water as an unutilized energy source was used for the heat source of heat pump system. LCC analysis is a concrete method for evaluating the economical efficiency of energy facilities of building. The present case study shows an example of adequate use of the LCC analysis on a heat pump system and conventional gas boiler and refrigerator for building heat supply. A life cycle of 20 years was used to calculated net present value of energy cost. Over a 20 year life cycle, the energy cost could be reduced by 612 million won if a heat pump system were used instead of a conventional boiler and an absorption refrigerator.