• Journal of the Korean Operations Research and Management Science Society
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• v.1 no.1
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• pp.67-69
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• 1976

이 글에서는 다음의 내용을 다루었다. 1. 소개단계(1963-1966년) 2. 교육단계(1966-1969년) 3. 연구보급단계(1968-1971년) 4. 도입적용단계(1972-현재)

• Korean Journal of Construction Engineering and Management
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• v.15 no.6
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• pp.44-52
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• 2014

Generally, the most difficult works at scheduling are to estimate the duration of activities and linkages between them because the possibility that the duration and linkages could be exposed to the uncertainties is so high. When estimating a project duration, therefore, the probabilistic estimation of the duration as well as the probabilistic estimation of the linkages between activities should be considered concurrently. The PERT that is one of the most popular techniques applied for the probabilistic estimation of a project duration can not consider the uncertainties of the linkages because it only estimates the probabilistic duration limited to 'FS0' relationship. The purpose of this study is to propose the new method "PLET" for stochastically estimating the project duration based on the probabilistic estimation of the BDM's relationships, and also provide more wide and various probabilsitic information about the project duration by it.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.5
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• pp.802-807
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• 2022

In projects where mufti-project management is required and processes for production activities are repeated and linked, it is very difficult to input processes for activity repeatedly or analyze loads by process in a method of managing processes step by step. In this paper, based on the definition of activity and project process, the connection process can be automatically created for activity, schedule and resource management for each process, schedule and resource plan can be established for each detailed process, and load analysis can be provided in real time. It presents a project management system that can significantly improve the time and cost of project progress management, predict various problems that may occur during the project, and effectively allocate the necessary amount of resources in the right place.

• Journal of Korean Institute of Industrial Engineers
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• v.3 no.2
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• pp.93-97
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• 1977

PERT/CPM type scheduling systems use a network to graphically portray the interrelationship among the activities of a project. This network representation of the project schedule shows all the precedence relationship regarding the order in which tasks must be performed. In this paper an algorithm is presented that changes the network configurations without violating precedence relationship of the original network.

• Journal of applied mathematics & informatics
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• v.20 no.1_2
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• pp.119-132
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• 2006

This paper presents an approach for using right-truncated exponentially distributed random variables to model activity times in stochastic activity networks. The advantages of using the right-truncated exponential distribution are discussed. The moments of a project completion time using the proposed distribution are derived and compared with other estimated moments in literature.

• Korean Management Science Review
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• v.12 no.3
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• pp.77-95
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• 1995

This paper shows the case study of risk analysis in an weapon system research and development project. For risk analysis, an advanced stochastic networking technique-VERT (Venture Evaluation and Review Technique) is used. Assumptions for activities of network diagram and conversion methods from PERT ( Program Evaluation and Review Technique) to VERT are discussed. Also, simulation result is presented and discussed.

• Proceedings of the Korean Vacuum Society Conference
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• 1996.02a
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• pp.75-76
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• 1996

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2006.10a
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• pp.62-62
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• 2006

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.427-431
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• 2002

Nowadays in Korea, there has been extreme competition due to market reduction in the domestic construction industry. As a result every company try to change rapidly to secure competitive power, Although it isn't betterment for the way of construction project management then there has many problem such as a delay of the appointed date of delivery and go over the budget. In this study, we suggest an introduction of CCPM which is based on TOC to construction projects.

• Journal of Electrical Engineering and Technology
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• v.13 no.3
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• pp.1337-1345
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• 2018

The reliability of power transmission and distribution depends up on the consistency of insulation in the high voltage power transformer. In recent times, considering the drawbacks of conventional mineral oils such as poor biodegradability and poor fire safety level, several research works are being carried out on natural ester based nanofluids. Earlier research works show that sunflower oil has similar dielectric characteristics compared with mineral oil. BIOTEMP oil which is now commercially available in the market for transformers is based on sunflower oil. Addition of nanofillers in the base oil improves the dielectric characteristics of liquid insulation. Only few results are available in the literature about the insulation characteristics of nano modified natural esters. Hence understanding the influence of addition of nanofillers in the dielectric properties of sunflower oil and collecting the database is important. Considering these facts, present work contributes to investigate the important characteristics such as partial discharge, lightning impulse, breakdown strength, tandelta, volume resistivity, viscosity and thermal characteristics of $SiO_2$ nano modified sunflower oil with different wt% concentration of nano filler material varied from 0.01wt% to 0.1wt%. From the obtained results, nano modified sunflower oil shows better performance than virgin sunflower oil and hence it may be a suitable candidate for power transformer applications.