• 한국건설관리학회논문집
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• 제18권2호
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• pp.30-37
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• 2017

공기연장과 관련한 많은 연구에도 불구하고 국내 공공 공사의 공기연장 추가간접비 산정방법에 대한 구체적인 연구가 없어 쟁점이 심화되고 있다. 또한 명확한 산정기준이 마련되지 않아 산정방식이 여러 가지로 혼용되고 있으며 타당성을 갖는 산정방식에 대한 고찰을 담은 연구가 없는 실정이다. 특히 장기계속계약에서의 휴지기발생시 추가간접비와 관련된 연구는 전무하다. 본 연구는 공사기간 동안 발생하는 비용의 패턴을 고려하여 국내 공공 공사의 특성을 반영한 공기연장 간접비 산출 방식을 제시하기 위해 현행 공기연장 간접비 산정 기준을 고찰하고 실태를 조사한 후 실제 사용되는 산정방식을 모형사례에 적용하여 그 산출결과를 비교 고찰하였다. 그 결과를 통해 기존 산정방식에 대한 문제점을 고찰하였으며, 기존 산정방식의 문제점을 고찰하는 과정에서 장기계속계약공사의 휴지기로 인한 추가간접비 산정에 적합한 산정방식인 '공사중지기간 총 실비산정방법'을 제시하였다.

• 한국건설관리학회논문집
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• 제19권4호
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• pp.61-69
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• 2018

원도급계약에서의 공기연장 추가간접비에 대한 연구는 지속되어왔다. 그러나 하도급계약에서의 공기연장 추가간접비 산정방식에 대한 연구는 거의 없는 실정이다. 본 연구는 기존 현장에서 사용되고 있는 공기연장 추가간접비 산정방식과 선행연구에서 제안된 공기연장 추가간접비 산정방식에 대해 고찰하고 모형사례를 분석하여 산정방식을 비교하였다. S-curves형태의 간접비 발생을 반영한 모형사례의 발생상황을 사례별로 제시하여 선행연구에서 제시된 공기연장 추가간접비 산정방식별 산출결과를 비교하였다. 산정방식의 문제점을 고찰하는 과정에서 원사업자의 공기연장 추가간접비 산정방식으로 타당한 것으로 연구된 바 있는, 지연기간 평균실비산정방법이 수급사업자의 공기연장 추가간접비 산정에도 타당하다는 결론을 도출하여 보편적으로 적용될 수 있음을 입증하였다.

• Journal of Preventive Medicine and Public Health
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• 제55권5호
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• pp.415-423
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• 2022

Economic evaluations in the healthcare are used to assess economic efficiency of pharmaceuticals and medical interventions such as diagnoses and medical procedures. This study introduces the main concepts of economic evaluation across its key steps: planning, outcome and cost calculation, modeling, cost-effectiveness results, uncertainty analysis, and decision-making. When planning an economic evaluation, we determine the study population, intervention, comparators, perspectives, time horizon, discount rates, and type of economic evaluation. In healthcare economic evaluations, outcomes include changes in mortality, the survival rate, life years, and quality-adjusted life years, while costs include medical, non-medical, and productivity costs. Model-based economic evaluations, including decision tree and Markov models, are mainly used to calculate the total costs and total effects. In cost-effectiveness or costutility analyses, cost-effectiveness is evaluated using the incremental cost-effectiveness ratio, which is the additional cost per one additional unit of effectiveness gained by an intervention compared with a comparator. All outcomes have uncertainties owing to limited evidence, diverse methodologies, and unexplained variation. Thus, researchers should review these uncertainties and confirm their robustness. We hope to contribute to the establishment and dissemination of economic evaluation methodologies that reflect Korean clinical and research environment and ultimately improve the rationality of healthcare policies.

• 산업경영시스템학회지
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• 제4권5호
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• pp.73-83
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• 1981

The purpose of value analysis is to assist each to approach nearer enough to this goal to provide substantial competitive and profit advantages. It provides planned and disciplined thought and act ion which hel ps identify unnecessary cost throughout the product or process cycle. Value analysis is a precise, disciplined, one-purpose thinking process. Its one purpose is to retain all the performance and aesthetic factors which now exist In the product, process or services, which the customer wants and is willing to pay for : and through disciplined thinking procedures, to put together Practical alternatives which will accomplish them at still lower cost. Value in a product or service is the reward for appropriate performance and appropriate cost Value analysis must therefore employ techniques which will sensitize any "lacking" area so that the need can be identified and satisfied. As the business begins to see the benefit of the activity, additional value analysts consultants may be added. This will provide more penetration in the three identified areas, of top managers group, individual value analysis consultants and senior member who organizes value analysis work, and besides, additional abilities will be secured.e secured.

• 한국항해항만학회지
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• 제44권4호
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• pp.326-337
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• 2020

선박금융 의사결정에서 해운기업들은 비합리적인 의사결정을 선택하는 경우가 있으며, 이러한 결과는 해운기업들에 막대한 손실을 유발시킨다. 이러한 선박금융 의사결정 선택에 대한 분석을 본 연구는 행동재무학 이론 중 엥카링 효과와 매몰 비용 효과 이론으로 접근 하였으며, 설문지법과 사례 분석 방법론으로 논문을 작성하였다. 분석 결과, 행동재무학 이론인 엥카링 효과와 매몰 비용 효과가 선박금융 의사결정에 영향을 미친다는 사실과 이러한 영향으로 의사결정자가 비합리적인 의사결정을 선택하게 될 수 있다는 사실을 발견했다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.59-60
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• 2019

Thermal bridge on a building envelope causes additional heat loss which increases the heating energy consumption. As the higher building insulation performance is required, heat loss through thermal bridge becomes higher proportion among total building heating energy consumption. For the exterior insulation and finish system, thermal bridge between window frame and concrete wall should be constidered as one of main reasons of heat loss. In this study, the thermal bridge barrier between window frame and concrete wall(STAR) was proposed as the best practice for reducing thermal bridge. The STAR was confirmed that the use of thermal bridge barrier imporved the annual heat energy capacity by 35% or more and the innitial construction cost by 7.4% or less because of additional interior insulation against condensation. Finally the life cycle cost during 20 year by heating energy of a building reduced by 25% or more compared with the exist technology. This STAR thermal bridge barrier will be used as the main technology to improve the energy efficiency of building.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.952-959
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• 2022

Active construction work zones will result in longer travel time and/or longer travel distances for road users because of reduced speed limits and/or detours. This results in increased fuel consumption and increased emissions of harmful gases such as Carbon Monoxide (CO), Nitrogen Oxides (NOx), and Sulfur Oxides (SOx), which causes discomfort to the environment and road users around the work zone. The impact of such emissions should be considered while designing work zones or determining the number of days the roadway will be allowed to be closed partially or fully. This study develops a methodology to compute additional road user costs associated with such work zones. To achieve this goal, a) an extensive literature review is conducted, b) a framework to compute emission cost is developed, c) emission rates are computed for all counties (95) of the state of Tennessee, and d) a case study is conducted to demonstrate the use of the framework to estimate the additional impact of emission because of the work zone. For the case study conducted, the emission cost was computed to be $10,653.60 for the duration of the project. State DOTs can account for such road user costs while selecting contractors using A+B bidding. Accounting for such impact of emission will also indicate the agency's willingness to consider sustainability as a part of the business practices.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1240-1240
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• 2022

Construction projects are fraught with risks from cost or other overruns to accidents along with other issues. This is true whether the relevant organization is an owner, general contractor, CM, specialty-trade contractor, or other entity. When cost issues or other issues confront arise, how should an organization proceed whether attempting to gain additional compensation in terms of cost/other damages or protecting the same against such claims if they do not appear to be warranted? Enter construction cost forensics. This presentation will focus on strategies/techniques with construction cost forensics in these areas in order to be successful. Covered techniques include those to develop and analyze claims including fundamental construction cost analysis techniques. When an unexpected event disrupts a construction project, using sound analytical methods to identify the cause and quantify the extent of the issue will be important for negotiating a fair result or for obtaining a successful outcome in arbitration or litigation. Key examples of uncovering issues via construction cost forensics will be covered in this presentation.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.111-112
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• 2012

Korean government is planning to supply a half million public and permanent rental houses from 2013 to 2018 for settlement of non-homeowners. It is requested an objective criterion to appropriate the budget for the rental houses construction project cost. In this study, construction cost indices, which reflect the inflation trend of construction resources, were explorated to suggest a effective methodology for the construction cost estimation of therental houses. We figured out the future construction cost indices using several scientific methods, and seven estimated indices values were shown. It is required an additional research to select the proper value among the analyzed indices.

• 대한전자공학회논문지
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• 제23권5호
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• pp.653-657
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• 1986

This paper describes a method to design a guaranteed cost controller for a system with uncertain parameters. The design procedure consists of defining an arbitrary function which satisfies certain condition and minimizing it over the control input. When the method is applied to a class kof linear systems with uncertain parameters, a Riccati equation with additional terms results. A simple example is presented to illustrate the usefulness of this method.