• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.6D
• /
• pp.623-636
• /
• 2012

Roundabout is an intersection that allows vehicles to pass through the intersection by circulating the circular traffic island at the center of the intersection. In this study, a comparative analysis was conducted on roundabout at five locations in order to deduce the operational result and financial effect of roundabout and signal intersection. As for the operational result, it was found that roundabout showed improvement effect in the average delay per vehicle compared to that of signal intersection by minimum of 65.6% and maximum of 91.77%. it was found that roundabout showed financial cost-saving effect in the traffic congestion cost compared to that of signal operation by minimum of 58.59% and maximum of 81.69% per year. It can be known from these analysis results that roundabout has significant operational effects under certain amount of traffic volume by allowing vehicles to pass through the intersection in a continuous way without much waiting time and stoppage from signal control.

• Journal of Korean Society of Transportation
• /
• v.27 no.5
• /
• pp.155-162
• /
• 2009

The recent increase of light rail construction by the private sector in Korea has caused a new issue in forecasting rail demand. Integrated fare systems between several rail operators is convenient and brings cost savings to users, and therefore is also very effective in increasing demand. However, it causes some short-term revenue loss to operators so that the private sector often suggests a non-integrated fare system. The current rail demand forecasting model is based upon an integrated fare system. Thus this model cannot be used to forecast the demand with a non-integrated fare system. Some value of transfer fare should be estimated and applied to forecast the demand in a non-integrated fare system. This study conducted a stated preference (SP) survey on urban railway passengers and estimated the value of transfer fare. The estimated value is 2,609 Won/hr, which is about 52% of in-vehicle time. This shows railway users have a tendency to pay more for transfer fares to save time or distance. This value has some limitations since it is derived from the SP survey. If some non-integrated fare system is applied in the future and a RP survey is conducted and compared with these study results, a more clear value of the transfer fare will be derived.

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1889_1890
• /
• 2009

오늘날 다변하는 한전의 전력 IT 환경에서는 전력 IT 가치를 최적화 할 수 있는 새로운 설치 기준검토가 필요하다. 기존 환경에서는 유연하지 못한 설계 때문에 통신설비를 적절한 시간 내에, 합리적 비용으로 구축한다는 것이 현실적으로 어려웠다. 그러나, 현재 통신기기 제작업체의 '모듈식 표준화'를 통해 통신실 설치요건을 최적화 할 수 있는 여건이 마련되고 있다. 이와 같은 새로운 환경에서 전력 IT 가치를 높여 주는 핵심 요인은 확장성을 고려한 모듈화 및 표준화이다. 본 연구에서는 통신실 구성 요소들의 모듈화와 랙 단위 중심의 시스템 통합을 위하여 통합시스템 표준지침과 그 규격 설정에 목적을 두었다.

• KSCI Review
• /
• v.9 no.2
• /
• pp.9-18
• /
• 2002

To establish and operate adequate business model is core procedure to survive from severe competitive environment and can create payoff through BM. Whether company have or maintain competitive advantage. It depends on how to position company in the value system. In this study. like to achieve integration and rebuilding of value chain through B2E relationship and affiliation which could not achieved because of limit of manpower, cost, time. After analysis of B2E model. affiliated program, propose Affiliated B2E model. Proposed model has mutual supplemented function module which compensate mutual profit between parent company and employee company.

• Journal of Korean Society of Transportation
• /
• v.17 no.1
• /
• pp.41-52
• /
• 1999

Recently, much literature has surveyed the economic effects of transportation investment, focusing on the relationship between transportation infrastructure investment and economic development. Although the conventional views assume that transportation investment stimulates economic growth, the results of recent studies are not conclusive and in some cases reject the conventional views. The contradictory results are linked with double counting Problem and Keynesian/Neo-classical economics theory. This article investigates the economic effects of road transportation with regard to freight transport using Stated Preference technique. This study examines, in particular, the value of time saving for freight which has been rarely studied in this area. In the first part, the value of time saving, excluding the value for driver and operating cost, is theoretically investigated through the model of continuous review system and periodic review system. At last, the empirical study using the Seated Preference technique shows the value of time saving for freight and the value of reliability, compared with other studies and the value of those in COBA. The result makes us conclude that road investment produces the secondary effects as well as the direct benefit such as time saving for passengers, operating cost saving. and accident cost reduction. The secondary effect includes the contribution to economic development.

• Proceedings of the KAIS Fall Conference
• /
• 2007.05a
• /
• pp.77-80
• /
• 2007

최근 기업의 경영환경은 매우 급격히 변화하고 있으며 지속적인 고객가치 향상에 대한 압력을 받고 있다. IT투자의 가장 중요한 목표는 더 이상 단순히 생산비용을 낮추는 것이 아니고 최적화된 대량 생산을 위해 디지털로 연결된 세상에서 고객들과 파트너들에게 기업의 유용성을 높이는 데 있다. 따라서 기업들은 BPM을 통해 확장된 기업의 프로세스를 자동화 하고, 통합하고 최적화하기 위해 모든 역량을 집중하고 있다. 또한 RFID 응용시스템을 통해 기술적 측면에 접근하여 비즈니스 확장을 위한 시스템 개발에 주력하고 있다. 그러나 기술적 측면, 비즈니스 프로세스적인 측면 조직적인 측면을 함께 고려하여야 성공적인 기업 역량을 이룰 수 있을 것이다. 따라서 본 논문에서는 기존의 BPM 에 RFID 시스템을 통해 비즈니스 프로세스에 대한 접근 모델을 제안하였다. 이 방법론을 통해 비즈니스 프로세스 분석에서부터 시스템 분석 및 설계에 따른 시간 비용, 품질, 및 고객의 만족 수준에 혁신적인 개선을 이끌어내는 접근 방법론을 기대할 수 있다.

• Korean Journal of Construction Engineering and Management
• /
• v.15 no.2
• /
• pp.71-78
• /
• 2014

Value Engineering methodology was introduced about 30years ago and has significant achievement in Korea. However, many of workshop still focus on cost down process and do not spend enough time on function analysis and expert cooperation. As a result, limited range of creative ideas were produced. To improve effectiveness of VE workshop, this study developed web-based value engineering process and system. And this study applied it to real case study to evaluate effectiveness of proposed system. Developed VE system also provides automated FAST diagram function and decision-making supporting tools. The authors found that this developed web-based VE system can significantly help to save cost and improve performance of VE workshop by using the appropriate VE process, and quick cooperation between experts. In addition, this study shows an example of a VE case study that applies the web-based VE system process, which led to a very innovative and effective way to lead workshop.

• Journal of the Korean Society for Railway
• /
• v.15 no.3
• /
• pp.294-299
• /
• 2012

Rail transport has been considered an environmental-friendly transport mode compared with other transport modes such as ship, truck, and aircraft. However, air pollutions emitted by diesel locomotives have emerged as social issues. In addition, the railway industry may not be able to avoid a duty of alleviating greenhouse gases emission owing to the Korean government policies for green growth which is an economic paradigm that simultaneously pursues growth and environmental improvement. Moreover, rising oil prices has burdened a train operating company. The purpose of this paper is to develop a methodology of determining an economical speed of diesel freight locomotive from the viewpoint of the train operating company. In the methodology, we first define an operational cost function based on various cost factors and then suggest formula to calculate an economical speed of diesel freight locomotive. To estimate the influence of cost factors such as diesel price, carbon taxes, and time costs on the speed of diesel freight locomotive, sensitivity analysis was conducted.

• The Journal of the Korea Contents Association
• /
• v.11 no.8
• /
• pp.459-467
• /
• 2011

BIS(Bus Information Systems) supplies the bus arrived time information for users in using BIT(Bus Information Terminal) installed on the bus stop. BIT is the device using peoples directly. So, BIT need a quick response when it flew. These are an important factor in the strategy of the BIS maintenance. BIT need a maintenance cost to operate smoothly. So, Suppose that commercial advertisement can be displayed on BIT screen in this study. And we researched an advertisement rates of the optimum level in using Contingent Valuation Method. In addition, we analyzed a characteristic of user's depending on each time using multinomial Logit Modeling method, and studied for BIT operation and ad. displaying strategy considered user's sex, ages and using times.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.859-862
• /
• 2015

Recent fashion business, is to promote and make a business strategy to realize a high added value to the first goal. Completion of the best men's clothing is only by making the pattern through a person's body size, making it as the best dressed. In this paper, we propose a system to automate production processes a significant impact on menswear production process, time and cost reduction in order to satisfy the needs of manufacturers and customers. Consequently, it is possible to provide optimal men's clothing by saving a time and expense of customers by, increases the customer's needs and men's clothing demand, it is possible to more easily perform to franchising custom men's clothing manufacturer.