Browsing by Author "Tsui, Yu-Kun"

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A factor-based probabilistic cost model to support bid-price estimation
(2012-04-01)
Wang, Wei-Chih
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Wang, Shih-Hsu
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Tsui, Yu-Kun
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Hsu, Ching-Hsiang
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土木工程學系
An appropriate bid price is essential for winning a construction project contract. However, making an accurate cost estimate is both time-consuming and expensive. Thus, a method that does not take much time and can approximate a proper bid price can help a contractor in making bid-price decisions when the available bid-estimation time is insufficient. Such a method can also generate a target cost and provide a cross-check for their bid prices that were estimated using a detailed process. This study proposes a novel model for quickly making a bid-price estimation that integrates a probabilistic cost sub-model and a multi-factor evaluation sub-model. The cost sub-model, which is simulation-based, focuses on the cost divisions to save estimation time. At the same time, the multi-factor evaluation sub-model captures the specific factors affecting the cost of each cost division. The advantages of the proposed model are demonstrated by its application to three residential housing projects located in northern Taiwan. The steps for applying this model to other contractors are also provided. (C) 2011 Elsevier Ltd. All rights reserved.
Application of project-based change management in construction: a case study
(2015-01-02)
Chen, Chun-Sung
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Tsui, Yu-Kun
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Dzeng, Ren-Jye
;
Wang, Wei-Chih
;
土木工程學系
Real-time information is vital to enhance dynamic control and management via information sharing and analysis in order to reduce construction conflicts and project delays. However, most construction project management programs are ineffective for project prompt responses, especially with respect to change management. This work presents a novel construction project management system called the web project-based change management (WPCM) system. The WPCM system responds to changes in information efficiently in order to facilitate change management among project participants (e.g. general contractor, suppliers, and subcontractors) in a construction project environment. Capable of increasing information sharing in construction change management, web-based technology can also provide cost savings via the Internet. A case study involving a commercial building project in Taiwan demonstrates the effectiveness of both the proposed WPCM system and information sharing in change control during the construction phase. In addition to increasing the efficiency of change control and management for a general contractor, as well as dynamic project tracking and management, the proposed system enables subcontractors and suppliers to access and manage the change information timely. Future work should implement the system functions comprehensively and apply the system to additional projects more strictly for further verification of its reliability.