• Title/Summary/Keyword: 건설공기

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Advanced Time-Cost Trade-Off Model using Mixed Integer Programming (혼합정수 프로그래밍 기법을 이용한 진보된 Time-Cost Trade-Off Model)

  • Kwon, Obin;Lee, Seunghyun;Son, Jaeho
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.6
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    • pp.53-62
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    • 2015
  • Time-Cost Trade-Off (TCTO) model is an important model in the construction project planning and control area. Two types of Existing TCTO model, continuous and discrete TCTO model, have been developed by researchers. However, Using only one type of model has a limitation to represent a realistic crash scenario of activities in the project. Thus, this paper presents a comprehensive TCTO model that combines a continuous and discrete model. Additional advanced features for non-linear relationship, incentive, and liquidated damage are included in the TCTO model. These features make the proposed model more applicable to the construction project. One CPM network with 6 activities is used to explain the proposed model. The model found an optimal schedule for the example to satisfy all the constraints. The results show that new model can represent more flexible crash scenario in TCTO model.

A Study on the Analysis of Delay Claim Risk in Apartment Housing Projects (공동주택공사에서의 공기지연 리스크분석에 관한 연구)

  • Kim Jae-Wook;Woo Kwang-Min;Lee Hak-Ki
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.217-221
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    • 2003
  • This study proposes a new classification system and analysis methodology for time delay risk of apartment projects. And this study proposes the classification of major trades and risk level and risk index by performing expert-oriented interview and survey report on a national scale. The purpose of this study is to present basic data for time delay risk management system through the analysis of risk level, risk index and rank of major 5 trades(earth work, structure work, masonry work, window and door/glass work, and interior finish work) in apartment projects.

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Estimation of Non-Working Day Considering Weather Factors in Construction Projects - Based on Estimation Periods for Improving the Forecast - (건설공사의 기후요소에 의한 작업불능일 산정기준에 관한 연구 - 예측성 향상을 위한 산정기간 비교분석 중심으로 -)

  • Lee Keun-Hyo;Kim Kyung-Rai;Shin Dong-Woo
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.394-397
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    • 2004
  • Working-day calculation with weather factors of construction-site has estimated wethout proper data. They usually estimate it with their own experience and intuition. It causes not only economic loss to time-adjustment but also conflict with each participants. Moreover, weather estimation becomes worse than before, due to tendency of recently weather change. So, in this paper we present optimal estimation method as assessment by period of the arithmetical mean methods. For that, we analyse characteristic of the regions and weather change of temperature and rainfall which affects time.

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Estimation of non-working days due to weather condition using fuzzy numbers (퍼지값을 이용한 기후요소 작업불능일 산정에 관한 연구)

  • Kim, Joo-Heon;Choi, Hee-Bok;Shin, Yoon-Seok;Cho, Hun-Hee;Kang, Kyung-In
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2008.11a
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    • pp.349-352
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    • 2008
  • Weather condition is the uncontrolled factor to influence the project duration. Determining non-working days due to it incorrectly leads to often change the project duration and increase the total cost as well as causing the dispute among stakeholders. When making decision of non-working days, it is important to consider the expert's experience according to the characteristic of the site and local area. Therefore this paper presented the method to estimate non-working days due to wether condition by using fuzzy numbers reflecting expert's subjective experience.

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