• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.851-854
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• 2008

본 연구는 군관사 건축물의 적정 유지관리비용의 산정을 위하여 수행하였다. 이를 위해 BTL방식으로 발주된 5개의 군관사 건축물을 사례대상으로 선정하였으며, 사례대상 건축물의 초기투자비용을 공종별로 분류한 후 장기 수선비용을 산정하였다. 또한 이렇게 산정된 공종별 장기수선비용을 공동주택 장기수선충당금 산정방법과 현가분석 산정방법을 준용하여 비교 분석하였다. 상기 같은 목적과 방법에 따라 진행된 본 연구의 결론을 요약하면 다음과 같다. 첫째, 초기투자비는 $m^2$당 건축 13,331,712원(79%), 토목 588,125원 (3%), 조경 285,658원(2%), 전기소화설비 760,549원(5%), 난방급탕설비 906,059원(5%), 급수위생설비 960,759원(6%)이며 초기투자비의 총 합계는 16,832,862천원으로 분석되었다. 둘째, 산정된 공종별 초기투자비를 바탕으로 공동주택의 장기수선비용을 산정한 후 공동주택 장기수선충당금 산정방법과 현가분석 산정방법을 각각 준용하여 적정 유지관리비용을 산정하였다.

• 한국국방경영분석학회지
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• 제34권3호
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• pp.41-51
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• 2008

현대전에 있어서 첨단 정밀 고가장비가 전투력에 미치는 영향은 지대하다. 그러나 평상시 지속적인 정비활동이 이루어지지 않으면 장비가동률은 저하되고 유사시 목표하는 전투력 발휘효과는 기대하기 어려울 것이다. 따라서 적정 장비유지비 소요를 예측하여 예산에 반영하는 것은 전투준비태세 완비를 위해서 필수적인 과제라 하겠다. 본 연구에서는 K-111 1/4톤 기동장비의 야전 운영 실적자료를 분석하여 장비유지비 발생추세를 분석하고, 이 분석 결과를 기초로 장비유지비 예측모델을 설계하였으며, 이 예측모델을 적용하여 장비유지비 소요 예측 기법과 향후 발전 방향에 대한 제언을 제시하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.784-791
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• 2007

Most operational organization and railway authority which conduct scheduled maintenance(SM) have carried out the preventive maintenance(PM) based on the information provided from supplier and manufacturer of railway system. However these activities are far away from reality and low the efficiency, it is because an appropriate methods for system selection didn't take into account for improving maintenance efficiency. Therefore, the current SM tasks and maintenance activities lead to lots of spend on the cost and time. To solve the above problem, this thesis presents new approach methodology. This proposes the criteria for reliability centered maintenance(RCM) system selection through level of quantification of each parameter, i.e, frequency, severity and maintenance cost, etc. To do this, the field operation data and information of maintenance cost are essential. As applying this methodology, we can look forward to improving efficiency of PM/SM, and reducing cost.

• 한국철도학회논문집
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• 제10권2호
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• pp.167-178
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• 2007

In general, it is known that the concrete ballast track is possible to reduce a cost of maintenance activities cause of maintenance free by restrictive maintenance in application of track ballast structures. However, if deteriorations and fracture mechanism of a material are considered, proper maintenance activities and repairing are continually required. For the problems, we evaluated an economical efficiency of the gravel ballast and the concrete ballast on a proper level of maintenance activities. As the method based on history path is difficult to obtain sufficient reliabilities cause of an absence of real data for maintenance activities, we chose the delphi survey method by professional group, and we obtained the appropriate index and profiles for maintenance activities. As a result, we founded that effects for cost reduction can be expected by preventive maintenance management, and we proposed economical restrictions and life cycle cost for track ballast structures in a life cycle.

• 한국신뢰성학회지:신뢰성응용연구
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• 제16권3호
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• pp.224-230
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• 2016

Purpose: Military maintenance involves corrective and preventive actions carried out to keep a system in or restore it to a predetermined condition. This research develops an optimal maintenance cycle for aviation oil testing equipment with acceptable reliability level and minimum maintenance cost. Methods: The optimal maintenance policy in this research aims to satisfy the desired reliability level at the lowest cost. We assume that the failure process of equipment follows the power law non-homogeneous Poisson process model and the maintenance system is a minimal repair policy. Estimation and other statistical procedures (trend test and goodness of fit test) are given for this model. Results: With time varying failure rate, we developed reliability-based maintenance cost optimization model. This model will reduce the ownership cost through adopting a proactive reliability focused maintenance system. Conclusion: Based on the analysis, it is recommended to increase the current maintenance cycle by three times which is 0.5 year to 1.5 years. Because of the system's built-in self-checking features, it is not expected to have any problems of preventative maintenance cycle.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.198-205
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• 2009

일반적으로 철도차량은 획득비용보다 운영 유지보수비용이 높다는 것이 알려져 있다. 운영 유지보수비용의 절감을 위해서는 운영 유지보수 비용 측면에서 효율적으로 설계된 철도차량을 획득하는 것이 매우 중요하다. 따라서 철도차량의 획득단계에서부터 운영 유지보수비용을 포함한 수명주기비용을 고려하는 것이 필요하다. 본 연구는 철도차량의 획득단계에서 수명주기비용을 고려하기 위한 절차 및 수명주기비용 모형을 제시한다.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.606-607
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• 2015

The traffic volume on the road shows various trends reflecting regional characteristics for monthly and hourly, and economic loss affecting users varies according to the selected period for the maintenance of road pavements. Therefore, in this study, the user cost (or delay cost) for monthly and hourly on the work zone near the Maesang Bridge Section on Poseung-Gu, Pyeongtaek-si, Gyeonggi-do was calculated using the time series models and VISSIM, and based on the result, the effect of user cost reduction according to the selection of best maintenance period was examined. The analysis result showed that the month of the lowest user cost occurred due to the maintenance of target section was January (10,293,258 KRW/Day×1km) and the month of the greatest user cost occurred was November (13,337,495 KRW/Day×1km).

• 한국산학기술학회논문지
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• 제17권1호
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• pp.274-283
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• 2016

본 논문은 복잡해지는 군수분야에서 효율적이고 효과적인 예방정비업무 할당을 위해 Hard Time업무의 최적 주기산정 및 이를 통한 경제적 효용성을 분석하는데 연구 목적이 있다. 본 연구는 기존 연구에서 제시하는 예방정비 주기 선정방법의 한계점을 분석하였다. 또한 일반적인 Wearout 고장 특성을 설명하는 와이블 수명분포에서 다양한 형상모수 조건과 예방정비비용과 고장정비비용 조건을 가정한 시뮬레이션을 통해 가상의 시스템에 대한 정비활동을 모의하여 총 정비비용의 추의를 분석하였다.

• Journal of Electrical Engineering and Technology
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• 제13권4호
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• pp.1631-1637
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• 2018

Electric utilities has been considered the necessity to introduce asset management of electric power facilities in order to reduce maintenance cost of existing facilities and to maximize profit. This paper aims to provide data that can helpful to make profitable decision in terms of power transformers which have a significant part in the power system. Therefore, this study is modeling input cost for power transformer during its entire life and also the life cycle cost (LCC) technique is applied. In particular, the variation of transformer state related with maintenance and the variation of the EUAC curve based on cost and effect of maintenance is examined. In this study, the trend of the equivalent uniform annual cost (EUAC) according to maintenance cycle and cost of equipment is analyzed. In line with that, sensitivity analysis influenced by the changes of other cost factors was performed.

• 한국군사과학기술학회지
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• 제13권4호
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• pp.601-611
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• 2010

Currently, a life cycle cost estimates(LCCE) is the most important factor in weapon system acquisition process. However, operation and maintenance(O&M) cost related studies are insufficient from the previous literature survey. O&M cost consists of various cost factors such a man power, maintenance and direct & indirect support costs. We have known that spare-parts cost is a key factor in the O&M cost. In this paper, we developed the spare-parts cost estimating relationships(CERs) of fixed-wing aircraft and armored vehicle weapon systems which include 4 historical cost drivers ; system acquisition cost, deterioration rate, localization rate, mission characteristic. Furthermore, we proposed the application methodologies that O&M cost estimating, total life cycle cost estimating and determination of the economic life using the spare-parts CERs.