Method for Calculating Schedule Delay Considering Lost Productivity
Publication: Journal of Construction Engineering and Management
Volume 131, Issue 11
Abstract
A delay claim often occurs when a difference between the actual completion date and the contract completion date exists. The duration of a delay is an essential piece of information required for determining the cause of a delay. However, it is difficult to analyze a delay claim due to the fact that numerous factors that cause this delay, thereby making it a very complex issue. One of such factors is the lost productivity or loss of productivity. Despite the fact that it is one of the major causes of delay, there have been only a few studies that focus on converting lost productivity into delay duration carried out to date. Claims for productivity losses are generally the result of tension between the contractor and the owner. This tension arises due to the great difficulty involved in quantifying disruption effects. Thus, to calculate accurately the delay duration, a logical method for analyzing schedule delay caused by lost productivity is necessary. Therefore, in this study, we propose a method for analyzing construction schedule delay where this lost productivity is taken into consideration. This methodology was implemented on a case project to ascertain its practicability, and to decide whether it can be utilized in the case of a delay claim related to lost productivity. The significance of this paper is twofold. One is the method to convert the lost productivity into the delay duration, which can be applied to reasonable delay claim settlement. The other is the process to analyze the construction schedule delay considering lost productivity.
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Acknowledgment
The writers would like to thank the Korea Institute of Science and Technology Evaluation and Planning (Grant No. UNSPECIFIEDM10104000274-01J000012100) for their contributions to this research.
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© 2005 ASCE.
History
Received: May 15, 2003
Accepted: Mar 22, 2005
Published online: Nov 1, 2005
Published in print: Nov 2005
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