• Title/Summary/Keyword: Analysis of cost

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Life-Cost-Cycle Evaluation Analysis of the Shunting Locomotive (입환기관차의 LCC 평가분석)

  • Bae Dae-Sung;Chung Jong-Duk
    • Journal of the Korean Society for Railway
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    • v.8 no.3
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    • pp.260-266
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    • 2005
  • The deterioration of a shunting locomotive was characterized for the lifetime assessment. The locomotive has been used for shunting works in steel making processes, and in this investigation, various types of technical evaluation methods for the locomotive parts were employed to assess the current deterioration status and to provide important clue for lifetime prediction. Unlike other rolling stocks in railway applications, the diesel shunting locomotive is composed of major components such as diesel engine, transmission, gear box, brake system, electronic devices, etc., which cover more than 70 percent of the total price of the locomotive. Therefore, in this paper, each part of major components in the diesel locomotive was analyzed in terms of the degree of deterioration. The lift-cycle-cost (LCC) analysis was performed based on the maintenance and repair history as compared with economical cost to provide the cost-effective prediction, i.e., to assess either repair for reuse or putting the locomotive out of service based on cost-effective calculation.

Economic Value of Platelet Glycoprotein IIb/IIIA Receptor Blocker (Abciximab) for Percutaneous Coronary Intervention (PCI시술시 혈소판 당단백 GP IIb/IIIA 억제제(Abciximab) 투여의 경제적 가치)

  • Kim, Jin-hyun;Shin, Sang-Jin;Kim, Eun-Ju;Lee, Young-Hee
    • YAKHAK HOEJI
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    • v.51 no.3
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    • pp.186-193
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    • 2007
  • This study was performed to analyse the economic value of abciximab which is used in PCI to prevent high-risk patients with ischemic complications. The effectiveness of abciximab was extracted from published clinical trials by search-ing CCIS, and the direct medical costs relevant to using abciximab were estimated from the NHI claims database. The results in terms of cost per life-year gained (LYG) and cost per QALY gained showed that abciximab was cost-effective enough to deserve its cost. Social net benefit resulting from abciximab in PCI was estimated to be 60-70 billion Won per year.

Economic Analysis of Long-life Asphalt Pavements using KoPMS (한국형 포장관리시스템을 활용한 장수명 아스팔트 포장의 경제성 분석)

  • Do, Myungsik;Kwon, Sooahn;Baek, Jongeun;Choi, Seunghyun
    • International Journal of Highway Engineering
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    • v.18 no.4
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    • pp.19-28
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    • 2016
  • PURPOSES : Long-life asphalt pavements are used widely in developed countries. In order to be able to devise an effective maintenance strategy for such pavements, in this study, we evaluated the performance of the long-life asphalt pavements constructed along the national highways in South Korea. Further, an economic evaluation of the long-life asphalt pavements was performed based on a life-cycle cost analysis. We aimed to devise a model for evaluating the performance of long-life asphalt pavements using the national highway pavement management system (PMS) database as well as for analyzing the economic feasibility of such pavements, in order to promote their use in South Korea. METHODS : The maintenance history and pavement performance data were obtained from the national highway PMS database. The pavement performances for a total of 292 sections of 10 lanes (5 northbound lanes and 5 eastbound lanes) of national highways were used in this study. Models to predict the performances of hot mix asphalt (HMA) and long-life asphalt pavements under two distinct traffic conditions were developed using a simple regression method. Further, the economic feasibility of long-life asphalt pavements was evaluated using the Korea Pavement Management System (KoPMS). RESULTS : We developed service-life prediction models based on the traffic volume and the equivalent of single-axle load and found that long-life asphalt pavements have service lives 50% longer than those of HMA pavements. Further, the results of the economic analysis showed that long-life asphalt pavements are superior in terms of various economic indexes, including user cost, delay cost, total cost, and user benefits, even though their maintenance cost is higher than that of HMA pavements. A comparison of the economic feasibilities of the various groups showed that group A is superior to HMA pavements in all aspects except in terms of the maintenance criterion (crack 20% or higher) as per the NPV index. However, the long-life asphalt pavements in group B were superior in terms of the maintenance criterion (crack 25% or higher) regardless of the economic feasibility. CONCLUSIONS : The service life of long-life asphalt pavements was found to be approximately 50% longer than that of HMA pavements, regardless of the traffic volume characteristics. The economic feasibility of long-life asphalt pavements was evaluated based on the KoPMS. The results of the economic analysis were the following: long-life asphalt pavements are exceptional in terms of almost all factors, such as user cost, delay cost, total cost, and user benefit; however, the exception is the maintenance cost. Further, the economic feasibility of the long-life asphalt pavements in group B was found to be better than that of the HMA pavements (crack 25% or higher).

A Study on Railway Transportation Business Cost Estimation & Decision Supporting Methods using Simulation Data (시뮬레이션을 활용한 철도교통사업 비용 추산 및 의사결정 지원 방법 연구)

  • Chang, Suk;Nam, Do Woo;Sim, Jeong Hwan;Kim, Dong Hee
    • Journal of the Korea Society for Simulation
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    • v.29 no.4
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    • pp.85-94
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    • 2020
  • In determining the feasibility of planning and launching railway transportation projects, various decision-making processes are essentially required. LCC(Life Cycle Cost) value including total construction cost and operation cost is estimated in approximation Model with rough guideline. In this study, modeling and simulation-based analysis method is proposed to support the decision making process of railroad transportation and derivation of LCC. Firstly, cost analysis model was constructed by collecting various existing rail transportation business data to enable analyze based on numerical data, and the result were analyzed by DOE(Design Of Experiments) and RSM (Response Surface Method) simulation. Professional commercial software tools were used for effective model construction and simulation. In order to verify the research results, the actual railroad transportation projects were selected, and the results of the analysis were compared.

Cost-effectiveness Analysis for Clothing Design Improvement Using Ergonomic Methods: Evaluation of Flame-proof Clothing and Design Optimization (의복 개선 설계의 비용 대비 인간공학적 효과 분석: 방연복의 평가 및 최적 설계 도출)

  • Cho, Ja-Young;Jeong, Jung-Rim;Yeon, Soo-Min;Chang, Joon-Ho;You, Hee-Cheon;Kim, Hee-Eun
    • Journal of the Ergonomics Society of Korea
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    • v.27 no.4
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    • pp.45-58
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    • 2008
  • Ergonomic techniques have been required to analyze the effectiveness of functional clothing design improvement in a systematic and analytic manner. The goals of the present study are to: (1) comprehensively and analytically examine the effectiveness of clothing improvement by using the relationship analysis between clothing design components (D) and ergonomic evaluation measures (E) and (2) prove the usefulness of cost-effectiveness analysis for clothing design optimization. The cost effectiveness analysis is comprised of the preliminary evaluation based on expertise and the in-depth evaluation where the D-E relationship analysis is applied. As a result of the cost effectiveness analysis applied to flame-proof clothing, an optimal design was identified by analyzing costs and qualitative/quantitative effects. In the preliminary evaluation, the expected effectiveness of each design alternative on wear efficiency and wear comfort was estimated. In the in-depth evaluation, however, the effectiveness of each design alternative was analyzed by quantitative evaluation in a wearing test using a questionnaire prepared based on the D-E relationship analysis. It was concluded that the D-E relationship analysis and the cost-effectiveness analysis are useful for comprehensive evaluation and optimization of functional clothing design.

Cost Normalization Procedure for Phase-Based Performance Measurement

  • Choi, Jiyong;Yun, Sungmin;Oliveira, Daniel;Mulva, Stephen;Kang, Youngcheol
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.72-76
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    • 2015
  • Capital project benchmarking requires an effective cost normalization process to compare cost performance of projects accomplished in different time and location. Existing cost normalization approaches have been established based on the assumption that all required information for cost normalization is fully identified once a project is completed. Cost normalization, however, is sometimes required to evaluate phase-level outcomes of an ongoing project where the required information is not fully available. This paper aims to provide a cost normalization procedure for phase-based performance assessment. The procedure consists of three normalization steps: currency conversion, location adjustment, and time adjustment considering various scenarios where the required information is not fully identified. This paper also presents how the cost normalization procedure has been applied to the 10-10 Performance Assessment Program, which is a phase-based performance assessment system developed by the Construction Industry Institute (CII). Both researchers and industrial professionals can apply the cost normalization procedure to studies and practices regarding to cost estimation, feasibility analysis, and performance assessment.

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Design Method for Cost Efficient Survivable Network (효율적 비용의 서바이벌 네트워크 설계방안)

  • Song, Myeong-Kyu
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.6
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    • pp.117-123
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    • 2009
  • There are two types of survivability. We find the characteristics of them for networks. And using the dual homing, we analysis the routing cost and link cost. Also we propose the cost-efficient heuristic design method of network topology in order to use survivability. By design samples, we analysis the cost efficiency and show that the new design method can be used to design network topology for survivability easily.

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Cost Analysis Model with Minimal Repair of Spare Unit Repair Policy under Periodic Maintenance Policy (정기보전 제도에서 응급수리를 고려한 대체품 수리정책에서의 비용분석 모델)

  • Kim Jae-Joong
    • Journal of Applied Reliability
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    • v.6 no.2
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    • pp.151-161
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    • 2006
  • This article is concerned with cost analysis model in periodic maintenance policy. The repair policy is differently applied according as unit importance during an item being used and unit restoration during an item being failed. So in this paper the repair policy with minimal repair is considered as follow : as the occurrence of failure between minimal repair and periodic interval time, unit is replaced by a spare unit until the periodic maintenance time arrived. Then total expected cost per unit time is calculated according to scale parameter of failure distribution in a view of customer's. The total expected costs are included repair and usage cost : operating, fixed, minimal repair, periodic maintenance and spare unit cost. Numerical example is shown in which failure time of item has Erlang distribution.

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Cost Analysis Model for Minimal Repair in Free-Replacement Policy (무상수리 정책에서 응급수리 적용의 비용분석 모델)

  • 김재중;김원중
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.20 no.43
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    • pp.241-247
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    • 1997
  • This paper is concerned with cost analysis model in free-replacement policy. The free-replacement policy with minimal repair is considered as follows; in a manufacturer's view point operating unit is periodically replaced, if a failure occurs between minimal repair and periodic maintenance time, unit is remained in a failure condition. Also unit undergoes minimal repair at failures in minimal-repair interval. Then total expected cost is calculated according to the parameter of failure distribution in a view of consumer's. The expected costs are included repair cost and usage cost: operating, fixed, minimal repair and loss cost. Numerical example is shown in which failure time of item has weibull distribution.

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A Cost Analysis Model of Minimal-Repairable Items in Free Replacement under the Periodic Maintenance Policy (정기보전제도에서 응급수리제품에 대한 무상수리 적용의 비용분석 모델)

  • 김재중;김원중;조남호
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.19 no.39
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    • pp.89-98
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    • 1996
  • This paper is concerned with cost analysis model in free -replacement policy under the periodic maintenance policy The free-replacement policy with minimal repairable item is considered as follows; in a manufacturer's view point operating unit is periodically replaced, if a failure occurs between minimal repair and periodic maintenance time, unit is remained in a failure condition. Also unit undergoes minimal repair at failures in minimal-repair interval. Then total expected cost per unit time is calculated according to maintenance period Tin a viewpoint of consumer's. The expected costs are included repair cost and usage cost: operating, fixed, minimal repair and loss cost. Numerical example is shown in which failure time of item has beta distribution.

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