• 산업경영시스템학회지
• /
• 제19권38호
• /
• pp.77-83
• /
• 1996

The design of multi -echelon distribution system is need for appropriate inventory control strategy considering for systematic tradeoff between trunk cost in central warehouse and inventory cost in regional warehouse. This study presents a method of the efficient inventory control of multi-echelon distribution system through partial leadtime management.

• 기술사
• /
• 제46권1호
• /
• pp.49-54
• /
• 2013

The total estimated socioeconomic logistics cost in transportation sector, including traffic congestion, household travel expenses, national macroeconomic logistics and traffic accident related cost, amount to approximately 240 trillion won a year in 2009. The amount is in increasing trend every year due to the inefficient infrastructure system in urban city roads and in intercity highways. The Government adopts the 4th National Spatial Planning (Revised) which is in progress in order to build a new physical environment ensuring people's welfare by providing the efficient and sustainable transportation networking system.

• 한국정보통신학회논문지
• /
• 제4권5호
• /
• pp.907-917
• /
• 2000

본 논문은 통신망간 상호접속시 합리적인 접속료를 산정하기 위해 필요한 통신망비용모형의 수립방안을 제시하고 있다. 현재 우리나라의 통신망간 상호접속료는 기본적으로 전부배부비용방식에 의해 산정하고 있다. 이 방식은 실제발생비용을 토대로 한 회계자료에 의해 접속료를 산정하는 방식이므로 회계자료관련 문제점뿐만 아니라 효율적인 사업운영을 고려하지 못하다는 단점을 가지고 있다. 이에 주요선진국에서는 경제적 비용을 토대로 장기증분비용기준방식의 도입에 대한 검토를 하면서 합리적인 통신망비용모형의 개발에 연구를 집중하고 있다. 우리나라의 경우 현재 전면경쟁환경의 조성과 대외개방압력의 증대 등 통신환경변화로 인하여 장기증분비용기준방식의 도입여부와 함께 통신망비용모형 개발의 필요성이 요구되고 있다. 이에 본 논문에서는 합리적인 접속료 산정을 위한 통신망비용모형의 수립방안을 제시하고 있다. 기본적으로 비용을 자본비용과 운영비용으로 구분하고 각 비용특성별 비용발생원인을 파악한 후 현재의 상호접속제도와 통신회계제도를 감안하여 합리적인 비용산정방법을 검토하고 있다.

• Architectural research
• /
• 제16권3호
• /
• pp.93-100
• /
• 2014

Existing BIM(Building Information Modeling) based energy evaluation tools cannot be utilized enough for the potential performance of BIM because most of them have not provided the integrated model for energy evaluation, assessment of the material, cost of the construction, and so on. This research aims to propose and develop a new application, EcoBIM, to support an integrated evaluation of the energy and cost efficiencies of the design alternatives within the design process. The proposed application functions as a BIM-based evaluation system that calculates energy-savings performance as well as the construction cost of the alternatives at the design stage. This study mainly focuses on the possibilities of developing the proposed technology. We also suggest an advanced design process using the proposed system, corresponding to changes of national regulations in Korea. This study deduce that EcoBIM can allow architects to make suitable decisions regarding energy- and cost-efficient designs. The proposed design process will allow architects not only to check the eco-friendly performance of design alternatives but also predict the operation cost in a certain period in the future. EcoBIM can prevent large-scale design changes required to obtain environmental certification and enable the owner to make an informed decision about the initial investment of construction according to the result of the analysis of the energy requirement at the design stage.

• 한국항만경제학회지
• /
• 제24권3호
• /
• pp.23-35
• /
• 2008

현행 접안료 부과방법은 부두건설비용과 무관하게 사용료를 부과하고 있으므로 부두건설비용을 제대로 회수하지 못하는 문제점이 있다. 본 논문에서는 부두건설비용 배분문제에 협조적 게임이론을 응용함으로써 컨테이너부두의 건설비용 보전을 위한 접안료 부과방법을 제시하였다. 연구결과 부산항 컨테이너부두의 경우 선박간에 상호보조(cross subsidy)가 발생하는 것으로 분석되었다. 2만톤 미만 선박은 현행방법이 유리한 반면 2만톤 초과선박은 샤플리밸류에 의한 비용배분이 유리한 것으로 나타났다. 따라서 부두건설비용을 회수하기 위한 사용료 인상뿐만 아니라 각 선박별로 상호보조를 완화시킬 수 있도록 접안료 부과방법을 개선할 필요가 있다는 시사점을 얻었다. 현행방법을 그대로 유지하는 상태에서 일괄적으로 사용료를 인상하는 방법은 비용보전의 문제는 해결할 수 있지만, 그 경우에도 상호보조의 문제는 여전히 남게 된다. 본 연구는 공정하고 효율적인 접안료 부과방법으로서 협조적 게임이론을 응용한 비용배분방법을 제안한다.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2001년도 학술대회지
• /
• pp.450-453
• /
• 2001

프로젝트의 초기단계인 기획·설계단계에서 비용이 차지하는 비율은 작지만 이 단계에서 계획된 내용에 따라 수명주기동안의 비용은 큰 영향을 받는다. 최근 정부에서도 공공 건설사업 효율화 종합대책과 부실시공 방지 종합대책을 통하여 타당성 단계에서 UC 검토를 활용하도록 하고 있다. 1980년 말부터 국내에서도 LCC에 관한 연구가 활발히 진행되어 오고 있으나 LCC 분석에 관한 절차와 세부지침, 실적자료의 부재로 실용화에 어려움을 가지고 있는 실정이다. 이에 본 연구에서는 건축물을 대상으로 수명주기동안의 총비용을 산정할 수 있는 분석 방법론과 비용모델을 제시하고, 전산화를 위한 알고리즘을 개발함으로써 효과적인 LCC 산정을 할 수 있도록 한다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2009년도 제40회 하계학술대회
• /
• pp.486_487
• /
• 2009

This paper presents a method for optimal operation to improve reliability of MicroGrid systems considering load types and interruption cost. The objective functions such as power losses cost, operation cost of dispersed generations, power purchasing cost, and interruption cost are minimized for reliability improvement and efficient operation. The several indices for reliability evaluation are improved by renewable energy sources installation.

• Journal of Nutrition and Health
• /
• 제36권10호
• /
• pp.1083-1093
• /
• 2003

Efficient financial management is a critical factor in achieving school foodservice goals. The objective of this study was to suggest efficient financial management practices in secondary school foodservices. In pursuit of this objective, we first identified performance indexes for measuring the success of financial management. Second, we suggested financial management standards, financial data classification methods and a report system. Last, we analyzed operating ratios with the financial data of self-operated and contract-managed school food services. The data were collected through an open-ended questionnaire from 10 middle/high school foodservices in Seoul and Kyeonggi Provincial during on-sites visits and interviews with dieticians and managers. Student participation, sales goals, re-contract frequency and number and cost of disaster loss were identified as the performance indexes for financial management. Income statements were compiled by identifying and classifying financial data. Total revenues consisted of subsidies, meal sales, other revenue and interest. Expenditures consisted of purchased food, salaries and wages, utility costs, office supplies, kitchen supplies, purchased services, company overhead indirect costs, facility investment and maintenance, facility usage expenses, employee benefits and miscellaneous. Mean price of a meal was 2,326 won at self-operated foodservices when the subsidies were included as revenues and 2,360 won at contract-managed foodservices. When including the subsidies as revenues, the operating ratios of self-operated foodservice showed that the food cost percentage was 66.9％, labor cost 23.2％, operation cost 9.9％ and profit 0％. The correspond figures at contract-managed foodservices were 57.6％, 21.5％, 15.3％, and 5.5％, respectively. Food costs in self-operated foodservices was significantly higher than that for contract-managed foodservices, however, facility investment and maintenance and facility usage expenses at self-operated foodservices was significantly lower than those for contract-managed foodservices. Based on this study, the methodology and classification system of financial data was found to be applicable to assess the financial structure of school foodservices.

• 산업공학
• /
• 제20권3호
• /
• pp.395-406
• /
• 2007

In the telecommunication industry, estimation of the cost of network facilities is very important since depreciation cost of the facilities accounts for a large portion of the product cost. Moreover, cost estimation in the industry becomes more difficult because of increasing indirect cost upon digital convergence, expanding multi-purpose facilities, complexity of service product, etc. Nevertheless, not much seem to have been done in improving estimation methodology of the cost of network facilities. As a result, the quality of cost information on network facilities has deteriorated, and now even decision-makers in the industry dismiss the information. Recently, two major telecommunication companies adopted a new network cost estimation method to deal with the issue. In this paper, we study the concept of new cost estimation method and the procedure to develop and apply it. We also suggest the method to carry out the cost allocation using Matlab which is more efficient and time-saving than other commercial cost calculation packages.

• 한국CDE학회논문집
• /
• 제8권2호
• /
• pp.101-108
• /
• 2003

Presented in this paper is the development of an product cost estimation system at the product design stage. The efficient cost estimation function at the design stage is essential for the cost reduction activities through the entire product life cycle. For this purpose, it is necessary to establish a systematic working procedure, and to develop information system for managing a great deal of production and product-related data required for the cost estimation. The developed system has the capability of estimating a cost of assembly type products as well as unit-item type products. As proposed system is based on the variant approach, it can be used easily at an early design stage without the need for detail design information. Also, this system is integrated with legacy PDM (Product Data Management) and ERP (Enterprise Resource Planning) system for fast. accurate and easy product cost estimation. The estimated cost includes material cost, overhead cost as well as labor cost.