The impacts of design errors and omissions change orders on highway projects

Yasaman Jalili, David N Ford, James Morgan

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

Design errors and omissions are among the most common change orders in transportation projects. Other than the direct impact of these change orders on project schedule and budget, design errors and omission can have secondary impacts on dependent project tasks which increases the total cost and delays caused by the change order. Study of the change orders in Texas Department of Transportation projects over eleven years show that 31% of the total change orders (45 million dollar per year on average) are related to design errors and omissions. In this study, design errors and omissions change orders have been analyzed based on the main cause of the change order and the project type. Six metrics (frequency, average cost/time impacts per contract and average cost/time impact as percent of the project bid amount/duration) have been used to compare the monetary and temporal impact of change orders. The most influential reasons for design errors and omissions change orders and the most vulnerable project types have been identified along with some suggestions to prevent and mitigate the impact of this type of change orders.
Original languageEnglish
Title of host publicationProceedings of the Transportation Research Board 95th Annual Meeting
Place of PublicationWashington, DC
PublisherTransportation Research Board
Pages1-14
Number of pages14
Publication statusPublished - 2016
EventTransportation Research Board 95th Annual Meeting - Walter E. Washington Convention Center, Washington DC, United States
Duration: 10 Jan 201614 Jan 2016

Conference

ConferenceTransportation Research Board 95th Annual Meeting
CountryUnited States
CityWashington DC
Period10/01/1614/01/16

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  • Cite this

    Jalili, Y., Ford, D. N., & Morgan, J. (2016). The impacts of design errors and omissions change orders on highway projects. In Proceedings of the Transportation Research Board 95th Annual Meeting (pp. 1-14). Transportation Research Board.