• Proceedings of the Korean Operations and Management Science Society Conference
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• 1998.10a
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• pp.157-160
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• 1998

통합생산시스템의 최적설계를 위하여 이의 생산공정(Manufacturing Process)과 물류시스템 (Material Handling System)은 두 가지 중요한 요소이다. 본 연구에서는 물류시스템의 성능 및 비용을 분석을 위하여 제품의 생산계획(Production Control & Scheduling), 설비배치(Layout) 및 물류시스템 (Material Handling System) 등을 고려하였다. 본 연구의 주요 목적을 통합생산시스템을 위하여 물류시스템 성능의 최적화와 경제적인 분석을 통하여 최적 물류시스템의 선택에 두고 다음 주요 내용들을 포함하였다; 1) 주요 입력 자료로서 통합생산 장비의 배치(Layout), 공정, 생산제품의 예측, 물류시스템 대안 등이 주어지고, 2) 이를 이용하여 각 물류시스템의 대안별 성능 및 비용 등을 비교 분석하고 최적 물류시스템을 선정한다. 본 연구를 위한 성능 및 비용분석을 위한 전산프로그램을 개발하고 이를 활용한 사례를 들어 보였다.

• Journal of Korean Association for Spatial Structures
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• v.7 no.2 s.24
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• pp.75-82
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• 2007

Building costs means capital costs which include cost of land, cost of acquiring and preparing the site, construction costs, engineering fees, furnishings, cost of financing the project, and cost of management required to run and maintenance the building for use. An economic analysis is one of the most important factor to determine the project feasibility. The purpose of the this study is to analysis on the construction cost structure of steel truss stadium.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.1103-1108
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• 2005

본 연구는 한국형 틸팅 차량의 복합재 적용 차체에 대한 비용 모델링과 전주기 평가(LCA)를 수행하였다. 원자재 생산에서 차체 제작, 수명이 끝나는 시점까지의 사용에 대한 모든 단계에서의 비용을 분석했다. 5년 동안 년간 90대의 생산량에 대한 금속 차체, 2종의 복합재 차체에 대해 비교하였다. 2종의 복합재 차체는 하이브리드 스틸-복합재 구조와 전체 복합재 차체를 나타낸다. 또한, 이 두 경우 모두에 대해 오토클레이브, 진공 성형, 레진 인퓨젼 공법의 성형에 대해 분석하였다. 제작시의 모든 성형 공법에 대해 하이브리드 차체는 전체 복합재 차체 보다 $4\~6\%$ 비용이 낮았다. 전체 복합재 차체의 경우, 레진 인퓨젼의 경우가 오토클레이브에 대해서는 $11\%$ 낮은 가장 낮은 제작 비용이 소요되었다. 비용-전주기 분석을 통해 전체 복합재 차체는 가장 높은 제작비용이 소요되고 사회 경제학적 측면에서 전체 전주기 비용과 환경영향은 단순 차량 구입 비용보다 더 중요한 변수이며 전체 복합재 차체가 분명한 최적의 해답 임을 확인하였다.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.117-118
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• 2007

정전비용 또는 전력공급지장비용은 평가방식이 다양하고 나라마다 그 결과값도 다양하여 범위가 상당이 크기 때문에 적합한 공급지장비용을 결정하는 것은 굉장히 어렵다. 하지만 전력공급시스템마다의 각각의 특성에 맞는 방식을 찾는 노력은 필요하다고 할 수 있다. 본 논문에서는 전력공급지장비용을 회피하기위한 국가적 전력공급시스템 측면에서의 전력공급비용을 수용가가 전력시장에서의 공급지장의 대안으로 지불할 의사가 이미 내포된 비용으로 평가하여, 발전설비와 전력수송경로 측면을 연결하여 용량요금과 예비전력 기본요금 분석을 통해 공급지장비용을 분석하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.240-241
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• 2019

With slow sea trade volumes growth and increasing competition of ports, port industry is witnessing an increasing number of factors that have driven up the costs. Using financial data collected from Korea's container terminal operators, this study analyzed cost structural characteristics. The differences by terminal size, region and operating status of the terminal operators were examined and the suggestion were presented based on the result of the analysis.

• Journal of the Korean Society of Propulsion Engineers
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• v.24 no.2
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• pp.35-42
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• 2020

Recently the reusable launch vehicle is being a major trend in the worldwide space market, because a few commercial companies, especially SpaceX, are trying to cut down the launch price through developing and succeeding the reusable launch vehicles. However, there is still a big controversy about whether in view point of the launch cost which is more favorable between expendable and reusable. Therefore, a study and close examination is required for the launch cost in the early development phase of the reusable launch vehicle. In this study the sensitivity analysis is performed with respect to the major cost parameters which have great effects on the launch cost and price. The standard vehicle of this sensitivity analysis is the expendable vehicle having a payload 20 tons. The cost estimation relationships used in this calculation are referred from the commonly proven cost models such as TRANSCOST. The major cost parameters chosen in this study are as follows: development cost, production cost, refurbishment cost, and maximum reusable number.

• Journal of the Korea institute for structural maintenance and inspection
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• v.11 no.6
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• pp.131-142
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• 2007

The road user cost in indirect costs as well as direct costs such as the inspection/ diagnosis cost and the repair/reinforcement cost should be considered as one of the important items in the life-cycle cost-effective design and maintenance of the bridges. To estimate the road user cost, this paper formulates the road user cost as a sum of the user delay cost and the vehicle operating cost considering the detour effect. A numerical traffic simulation and a regression analysis are performed to develop a regression model due to a time delay. The proposed regression model is applied to the generation of the maintenance strategy based on the life-cycle cost and performance, and its effectiveness and applicability is investigated. The road user cost has a great influence on establishing the maintenance strategy, and the proposed regression model could be successfully utilized to estimate the road user cost of a bridge.

• Korean Journal of Construction Engineering and Management
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• v.9 no.3
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• pp.136-145
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• 2008

Occasionally an owner of public construction work pays financial costs in addition to progress payments. However, the overall scale of financial costs are not known. This research examines, based on a case study, the financial cost incurred in public construction works and the following issues: the overall scale of financial costs, the impact on financial costs on the owner, and the impact of timing on the overall sum of the financial costs. Annually, more than 2.3 trillion KRW are paid as progress payments for public construction work; yet, there is no research data showing the scale of financial costs thus incurred. The purpose of this research is to illustrate the scale of financial costs incurred due to progress payments for public construction works, and to suggest alternatives that would improve relevant regulations.

• The Journal of the Korea Contents Association
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• v.18 no.4
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• pp.664-676
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• 2018

This study used raw data from the Korea Medical Panel Survey for 2014 to analyze the factors affecting the cost of medicine expenditure. A total of 3,107 people with medical expenses were selected for the final analysis. Analysis methods were frequency analysis, crossover analysis, regression analysis and t-test. The significance level of all tests was p = .05. The prescription cost was 72.4%, the minimum cost was 84 won, the maximum cost was 270,653 won, and the highest amount was 'over 3,000 won~less than 10,000 won' (31.7%). The general pharmaceuticals cost was 81.8%, the minimum cost was 800 won, the maximum cost was 2,718,000 won, and the highest amount was 'less than 20,000 won' (31.4%). The herbal medicine cost was 9.4%, the minimum cost was 4,000 won, the maximum cost was 2,700,000 won, and the highest amount was 'over 100,000 won' (37.8%). The medicines expenditure was the maximum cost was 2,760,093 won, and the highest amount was 'over 100,000 won' (27.0%). Factors affecting medicine expenditure were gender, marital status, income quintile, easement, and subjective health status.

• International Journal of Highway Engineering
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• v.13 no.4
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• pp.167-175
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• 2011

Evaluation of fuel consumption for the various road condition and vehicle type is necessary to perform the economic analysis of road construction which is important for the efficient design and management of road. Economic analysis of road should consider the social cost which can be divided into agency cost including initial construction expense, maintenance cost, and so on, and user cost consisting of vehicle operating cost, congestion cost, etc. Since vehicle operating cost depends on the traffic volume, fuel consumption that is a major part of vehicle operating cost will change by traffic volume as well. Fuel consumption is significantly affected by vehicle speed and road condition, especially the roughness. Thus, fuel consumption should be evaluated in terms of road condition, which is not currently considered. In this study, the estimation model of fuel consumption for the passenger cars in Korea has been developed by considering the road condition. First, the relationship between vehicle speed and fuel consumption that is used to calculate the vehicle operating cost for investment evaluation of transportation facility and the initial feasibility study of road construction was investigated. Second, with the consideration of road roughness, fuel consumption of the passenger car was measured. From the measurement, it was found that fuel consumption increased by $80m{\ell}$ per 100km driving as the roughness increased by 1m/km. Therefore, it is recommended that for the economic analysis of road design and management, the fuel consumption should be a function of road roughness.