Adopting a Method for Calculating the Impact of Change Orders on the Time it Takes to Complete Bridge Projects | ||
| Iraqi Journal of Civil Engineering | ||
| Article 6, Volume 15, Issue 2, December 2021, Pages 52-58 PDF (387.82 K) | ||
| DOI: 10.37650/ijce.2021.172873 | ||
| Authors | ||
| Saif Saad Mohammed Khuder* 1; AbdulRahman Adnan Ibrahim1; Osama Abd Al-Ameer Eedan2 | ||
| 1College of Civil Engineering - University of Tikrit- Iraq | ||
| 2University of Technology - Department of Civil Engineering – Iraq | ||
| Abstract | ||
| If the employer believes that changing the shape, quality, or quantity of the work or some part of it is appropriate, he has the authority to order the contractor to do so. These instructions would extend the time it takes to accomplish the task and, as a result, the project's completion time. In the majority of situations, the employer and the contractor couldn't agree on how to compute the extra time the contractor was provided as a result of change orders. The aim of this research is to find a mechanism to determine the additional time required to carry out these works, which will vary based on the type of work, the increase in quantity for any work within the contract, etc.. Modify the nature, quality or type of any work, change the levels, lines, position and dimensions of any part of the work, and perform any additional work necessary to finish the works. A field visit and survey will be conducted on the various bridge projects as part of the research to determine the types of change orders and the additional time required for each of them, in addition to the most important reasons for not using the relative change length and how each project differs from the other. Mathematical software can be enhanced to reliably calculate the additional time for each form of change order. Most of the works expected to appear in variation order are steel and concrete works, and asphalt cladding works, with a frequency of each of them (25 percent), followed by excavation works, which have a frequency of (16.66 percent) in bridge projects. | ||
| Keywords | ||
| Bridges projects; Change order; Cost of work; Additional time; Modeling | ||
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