• Information Systems Review
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• v.4 no.2
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• pp.293-307
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• 2002

In this study, industry-specific application systems operation cost estmation models are suggested. We reviewed operation cost models of previous researches, and developed a strong need for industry-specific operation outsourcing cost models. Security industry operation cost model and medical care industry outsourcing cost model are proposed, and tested with empirical data. We showed the validity of industry-specific application systems outsourcing cost models. Future research will be needed to develop outsourcing cost models for other industries and to refine cost models developed in this study.

• Nuclear industry
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• v.17 no.3 s.169
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• pp.73-82
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• 1997

모든 원전 사업자들은 원전을 운영함에 있어서 많은 도전에 직면해 있다. 그 중 비용의 절감, 특히 운전 및 정비 비용의 절감은 그 대응의 필수 요소이다. 세계의 여러 원전 운영자들은 원전의 운영 비용을 절감하기 위해 각종 정보를 교환하면서 좋은 방안을 공유하고자 한다. 그 현황을 알아본다.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.281-286
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• 2008

정보산업이 발달함에 따라 유사한 제품이 많이 출시되어, 기업은 목적, 용도 및 비용 등을 고려해서 최적을 제품을 선택하기 위해, 여러 제품을 대상으로 BMT를 실시하고 있다. 그러나 기존 BMT는 소프트웨어 운영 중에 지속적으로 발생하는 비용을 고려하지 않고 기능과 성능을 위주로 하여 절반의 정보만을 제공하였다. 그래서 본 논문에서는 품질 특성을 바탕으로 운영 중 발생하는 운영비용을 고려한 BMT 항목 도출 방법을 제안하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.276-281
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• 2009

장거리 용수공급 시스템에서 전력비용은 전체 운영비용의 큰 부분을 차지한다. 본 연구는 시간단위의 펌프와 배수지 시스템의 최적 운영계획을 수립하기 위해 동적계획기법에 기초한 방법론을 제시하고 있다. 해석방법은 가용 가능한 펌프의 효율적 운전과 전력요금체계, 시간대별 용수수요추이 그리고 배수지 특성과 송수관로의 제약조건 등을 고려하였다. 이를 위해 적용 가능한 시스템 운영목적과 제약조건이 제시되었고 개발된 방법은 수도권 광역상수도 양주계통의 2개 가압장과 5개 배수지를 대상으로 적용되었으며, 적용결과는 상당한 수준의 펌프운전비용을 절감할 수 있는 것으로 나타났다. 이와 같은 방법은 생애주기 비용 최소화 측면에서 실제 용수공급 시설 운영과 대규모 용수공급 체계의 설계 등에 적용이 가능하다.

• Journal of the Korean Society for Railway
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• v.16 no.4
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• pp.318-330
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• 2013

It is necessary to estimate the operating cost for constructing an urban railway system. The present study was thus carried out to develop an estimation function of the operating cost for a MRT(Medium-sized Rapid Transit) system. We selected seven independent variables that could influence the operating cost: the rolling stocks, the number of trains in operation, the length of the lines, the number of stations, the number of passengers per day, the frequency of train operation, and the number of depots. We performed a multiple regression using Excel. Three types of regression functions were thereupon developed. All of them proved to be appropriate after comparing the results of the estimated cost. It will therefore be possible to use one of these three types, depending on the assumptions of the independent variables.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.198-205
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• 2009

It is known that the operation and maintenance cost is generally higher than the acquisition cost of rolling stocks. It is very important for reducing the operation and maintenance cost to acquire the rolling stocks which are well designed with regard to the operation and maintenance cost. Therefore life cycle cost including the operation and maintenance cost is needed to be considered from the acquisition phase. This article presents a procedure and a model for life cycle cost which are applicable to the acquisition of rolling stocks.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.10
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• pp.172-177
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• 2006

This paper presents a method to improve reliability considering dispersed generator(DG) installation and interruption cost with load types. It is used to the different interruption costs with load pattern of daily peak load. The objective functions such as power losses cost operation cost of DG, power buy cost and interruption cost are minimized for reliability improvement and efficient operation. The several indices for reliability evaluation are improved by dispersed generator installation. The proposed method is applied to IEEE 13 bus test systems to demonstrate its effectiveness.

• Journal of Navigation and Port Research
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• v.29 no.5 s.101
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• pp.421-429
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• 2005

Traditionally, determination of the optimal containership size is the most important factor for competitiveness of shipping companies in the shipping market. Under this environment, many shipping companies and researchers have studied about it. The objective of this research is to determine the optimal containership size using a total shipping cost in the main trunk lines. Total shipping cost is calculated at the ground of capital costs, vessel operation costs, voyage costs, port charges and miscellaneous costs for 'Europe-Far East', 'Far East-North America' and 'Europe-Far East-North America' services. Analysis results showed that the 6,500TEU containership is an optimal size on the 'Europe-Far East' and 'Europe-Far East-North America' services. And the 8,200TEU containership is an optimal size on the 'Far East-North America' service. Moreover, if the larger containerships over 8,200TEU class start operation afterward, it would be less competitive in the analyzed 3services.

• Journal of Korean Society of Transportation
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• v.34 no.5
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• pp.465-475
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• 2016

Since inaccurate demand estimation for recent urban rail construction may result in financial burden to cities, precise prediction for operating cost as well as construction costs is necessary to avoid or reduce budget loss of the local or central government. The operating cost is directly related to the public fare and affect a policy to determine the rate system. Therefore, there is a pressing need to develop an estimating model for reliable operating cost of urban railway. This study introduces a new model to estimate the operating cost with new variables. It provides a better prediction in accuracy and reliability compared to the existing model, considering the feature of urban railway. For verification of our model, railway operation data from a few cities for the last five years were comprehensively examined to determine variables that affect the operating cost. The operating cost was estimated in a dummy regression model using five independent variables, which were average distance between stations, daily trains distance, total passenger capacity of a train in a train, driving mode(manned/unmanned), and investment type(financial/private).

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.353-354
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• 2006

계통운영 보조서비스는 전력계통의 안정성 확보, 전기품질 유지 및 전력거래 활성화를 위한 필수적인 서비스이다. 계통운영보조서비스의 비용요소는 연료비, 운영유지비, 자본비용, 기회비용으로 구분된다. 이의 적정비용규모를 산정하여 보조서비스 제공자에게 보상함으로써 전력의 공급안정성 화보에 크게 기여할 수 있게 된다. 여기서는 국내 전력시장에서 연료비와 운영유지비 측면에서 적정비용규모를 산정하고 현재 운용중인 시장규칙과 비하여 개선방안을 제시한다.