• Title/Summary/Keyword: Engineering Economic Decision

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The Economic Value of Residential Electricity Consumption in Seoul

  • Yoo, Seung-Hoon;Lee, Seung-Ryul
    • Journal of Energy Engineering
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    • v.21 no.1
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    • pp.81-85
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    • 2012
  • Electricity is the basic building block of economic development, and constitutes one of the vital infra-structural inputs in socio-economic development. The demand for electricity has been increasing due to extensive urbanization, industrialization, and a rise in the standard of living, as is the case with residential electricity consumption. This paper attempts to estimate the consumer surplus and the economic value of the residential consumption of electricity in Seoul to assist in decision-making in electricity management. The estimated consumer surplus represents the value of the area under the demand curve, above the actual price that is paid for residential electricity consumption. The estimated annual consumer surplus and economic value for the year 2005 amount to 2,144.7 and 3,727.4 billion won, respectively. The estimates per kWh were 184.9 and 316.0 won, respectively, which imply that the consumer surplus and the economic value of residential electricity consumption significantly outweigh the average price of electricity in 2005 of 91.1 won per kWh.

Analysis of Problems and Improvement of Environmental Impact Assessment in Social-Economic Items Based on 19 Major Large Scale Development Projects (주요개발사업의 환경영향평가서 분석을 통한 사회경제항목평가의 문제점과 개선방안)

  • Lee, Sang-Don
    • Journal of Environmental Impact Assessment
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    • v.13 no.4
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    • pp.165-185
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    • 2004
  • Assessment in Socio-economic items should be used to estimate social influence when policies and projects were introduced. To estimate current situation of socio-economic items 19 Environmental Impact Statement (EIS) of large scale projects were analyzed. The projects were selected based on magnitude of social impact when the projects were implemented. Environmental Impact Statement was categorized into line projects(road construction, railroad construction, stream development, etc), and surface projects(energy development, wetland reclamation, recreation and sport development, and housing and residential development, etc) thus being chosen for 19 projects in each categories. This report was based on the analysis of 7 items in socio-economic environmental items(i.e., population, residents, industry, public facilities, education, transport and historical monument). Most EIS did not follow the regulation suggested by Ministry of Environment, and only current circumstances were briefly described. Indifference of in-depth analysis of socioeconomic environmental items would influence the process of social and environment impact negatively in the midst of construction of National Projects such as Outer Circle Seoul Highways, Saemankeum Reclamation Projects, etc. This abrupt halt of construction was mostly based on a lack of public hearing or public participation. Socio-economic items are also very much lacking in quantitative method and strengthening socio-economic environmental items is needed via checklist or matrix that brings decision-makers better ideas objectively.

A multi-criteria decision-making process for selecting decontamination methods for radioactively contaminated metal components

  • Inhye Hahm ;Daehyun Kim;Ho jin Ryu;Sungyeol Choi
    • Nuclear Engineering and Technology
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    • v.55 no.1
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    • pp.52-62
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    • 2023
  • Various decontamination technologies have been developed for removing contaminated areas in industries. Although it is important to consider parameters such as safety, cost, and time when selecting the decontamination technology, till date their comparative study is missing. Furthermore, different decontamination technologies influence the decontamination effects in different ways. Therefore, this study compares different decontamination techniques for the steam generator using a multicriteria decision-making method. A steam generator is a large device comprising both low- and very low-level waste (LLW, VLLW) and reflects the difference in weights of the standards according to the classification of the waste. For LLW and VLLW decontaminations, chemical oxidizing reduction decontamination (CORD) and decontamination grit blasting were used as the preferred techniques, respectively, considering the purpose of decontamination differs based on the initial state of waste. An expert survey revealed that safety in LLW and waste minimization in VLLW exhibited high preference. This evaluation method can be applied not only to the comparison between each process, but also to the creation of process scenarios. Therefore, determining the decontamination approach using logical decision-making methods may improve the safety and economic feasibility of each step in the decommissioning process and ensure a public acceptance.

Development of MCDM for the Selection of Preferable Alternative and Determination of Investment Priority in Water Resource Projects (수자원사업 대안선정 및 투자우선순위결정을 위한 다기준의사결정모형 개발)

  • Yeo, Kyudong;Kim, Gilho;Lee, Sangwon;Choi, Seungan
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.31 no.6B
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    • pp.551-563
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    • 2011
  • Water resource projects need an enormous national budget. Therefore, a reasonable and reliable decision making is required for the planning of water resource projects, but decision making has been mostly performed by economic analysis. The objective of this study is to develop a Multi-criteria Decision Making(MCDM) model which can assess the project in various aspects for the selection of preferable alternative and determination of investment priority in water resource projects. In this study, the criteria involves economic feasibility, policies, vulnerability, and sub-items which have weights obtained from the expert survey for the consistent evaluation. We also derived the utility function considering risk trend of each item based on the expert survey. Then, the total score was estimated by weights of each item and utility score of each attribute. The results show that vulnerability is a major contributor for the criteria. This study will contribute to the selection of proper water resource projects considering efficiency of project and fairness for vulnerable area.

An Evaluation of the Economic Value of Outsourcing of Water Supply Services Considering Uncertainty of Water Price (수도요금의 불확실성을 고려한 상수도 사업의 가치 평가)

  • Jeong, In-Chan;Kim, Jae-Hee;Kim, Sheung-Kown
    • Korean Management Science Review
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    • v.31 no.3
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    • pp.95-111
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    • 2014
  • It is essential to carry out an economic analysis on public water supply projects so that policy makers and water enterprises are aware of the actual value of the project. However, many popular approaches based on discounted cash flow analysis do not capture the uncertainties inherent in cash flow. In order to analyze the economic values of the water supply project of local governments, we utilize real option model, which considers uncertainty in future water price behavior and captures the value of real life flexibility. The real option model is designed to incorporate the option to expand and abandon, and it is applied to a local government case. Furthermore, we assess the project by exploring Luehrman's option space to accommodate the more efficient decision making. The results show that substantial amount of potential value is included in the public water supply service, and the overall value is greater than the value obtained from the discounted cash flow model.

Emergy Valuation of a Tidal Flat Ecosystem in the Southwestern Coast of Korea and Its Comparison with Valuations Using Economic Methodologies (영산강 4단계 간척사업 대상 갯벌생태계 가치의 에머지 평가 및 경제학적 평가와의 비교)

  • Kang Dae-Seok;Nam Jung-Ho;Lee Suk-Mo
    • Journal of Environmental Science International
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    • v.15 no.3
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    • pp.243-252
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    • 2006
  • The emergy concept was used to valuate the contributions of a tidal flat ecosystem included in the fourth stage reclamation plan for the Youngsan River area to the Korean economy. Emergy contributions of the ecosystem were compared with those of economic valuations performed on the same ecosystem. The tidal flat ecosystem contributed 3.55 million EmW/ha annually. This, however, cannot be compared directly with those of the economic valuations because both methodologies approach the valuation of ecosystems in different perspectives. The emergy methodology is a donor-based valuation in which what goes into making a product or service is measured, while the economic valuation is a receiver-based approach in which human receivers determine the value of an ecosystem product or service. An emergy valuation was conducted for the three ecosystem functions included in the economic valuations to compare the results of both methodologies on the same basis. Fishery production and pollutants removal contributed 9.86 million EmW/ha/yr and 0.88 million EmW/ha/yr, respective1y. The conservation value of the tidal flat ecosystem was 3.55 million EmW/ha/yr. Overall, the emergy valuation that try to include works of both human and nature on the same basis resulted in higher economic contribution of the tidal flat ecosystem than that calculated by the economic methodologies in which only human works are measured based on the willingness-to-pay of people. This study showed that the emergy concept could provide an alternative tool for policy decision-making regarding utilization and conservation of ecosystems by approaching the ecosystem valuation from a different perspective than that of economic methodologies.

A Tool for Optimizing Simulated Discrete Variable Stochastic Systems: SIMICOM

  • Lee, Young-Hae;Azadivar, F.
    • Journal of Korean Institute of Industrial Engineers
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    • v.12 no.1
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    • pp.107-118
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    • 1986
  • A heuristic algorithm (SIMICOM) has been designed and tested for optimizing simulated stochastic systems whose performances are functions of several discrete decision variables. The approach adopted utilizes an integer complex method coupled with techniques of establishing confidence intervals for the system's responses. It can handle a general class of optimization problems that could be constrained or unconstrained. In constrained cases, the constraints could either be explicit analytical functions of decision variables or be expressed as other responses of the simulation model. In addition to obtain a reasonably accurate solution, the economic aspect of obtaining the solution has also been taken into consideration.

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Management of Product Life Cycle Data for Environmental Design (환경친화적 설계를 위한 제품 전주기 데이터 관리)

  • 황오현;강무진;이화조;최병욱
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.115-120
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    • 1997
  • Environmental Product Life Cycle Management is an activity for defining and describing the product, process or activity environmentally. Especially, the main responsibility for the environmental impact of products lies in the design phase of product. Designers cany a heavy responsibility to determine technical, economic and ecological properties of the product. So in order to help designers, structured understanding and application of treating large amount of data and infonnation should be considered. This paper presents a methodological approach for decision supporting to build Product Life Cycle Management system and show a set of database modeling. Additionally, a key issue for databases is the quality of the provided information.

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Nonlinear Relationship Analysis of Factors Influencing Decision Making by Smartphone (스마트폰에 의한 의사결정 영향 요인의 비선형 관계 분석)

  • Park, So-Young;Kim, Mincheol;Lee, Chang-Hoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.25 no.6
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    • pp.841-848
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    • 2021
  • The purpose of this study was to explore what factors influenced users using smartphones in their decision making. In this study, intimacy/personal connectivity, use/dependence, familiarity/professionalism, efficacy/effectiveness, self-identity, control, etc. were set as independent variables and decision-making as dependent variables. In this study, 200 smartphone users were collected and analyzed through a questionnaire, and a nonlinear analysis method using WarpPLS software was utilized to identify the effects between variables. As a result, this study confirmed that factors in smart phone ownership (SPO) could affect individual decision-making and identify that users' psychological factors in the use of smart devices would be directly related to the outcome of decision-making. Through this, it is possible to understand the development of future industries and the acceptability of users using smart devices. and will be meaningful research in tourism, new product development, or continuous brand development.