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Al-Sobiei, O S, Arditi, D and Polat, G (2005) Managing Owner’s Risk of Contractor Default. Journal of Construction Engineering and Management, 131(09), 973–8.

Gambatese, J A, Behm, M and Hinze, J W (2005) Viability of Designing for Construction Worker Safety. Journal of Construction Engineering and Management, 131(09), 1029–36.

Goodrum, P M and Dai, J (2005) Differences in Occupational Injuries, Illnesses, and Fatalities among Hispanic and Non-Hispanic Construction Workers. Journal of Construction Engineering and Management, 131(09), 1021–8.

Harper, D G and Bernold, L E (2005) Success of Supplier Alliances for Capital Projects. Journal of Construction Engineering and Management, 131(09), 979–85.

Jiang, G and Shi, J (2005) Exact Algorithm for Solving Project Scheduling Problems under Multiple Resource Constraints. Journal of Construction Engineering and Management, 131(09), 986–92.

Kilian, J J and Gibson, G E (2005) Construction Litigation for the U.S. Naval Facilities Engineering Command, 1982–2002. Journal of Construction Engineering and Management, 131(09), 945–52.

Mohamed, Y and AbouRizk, S (2005) Technical Knowledge Consolidation using Theory of Inventive Problem Solving. Journal of Construction Engineering and Management, 131(09), 993–1001.

O’Connor, J T and Huh, Y (2005) Crew Production Rates for Contract Time Estimation: Bent Footing, Column, and Cap of Highway Bridges. Journal of Construction Engineering and Management, 131(09), 1013–20.

Riley, D R, Diller, B E and Kerr, D (2005) Effects of Delivery Systems on Change Order Size and Frequency in Mechanical Construction. Journal of Construction Engineering and Management, 131(09), 953–62.

  • Type: Journal Article
  • Keywords: Change orders; Design/build; Mechanical systems; Cost control; Construction industry;
  • ISBN/ISSN: 0733-9364
  • URL: https://doi.org/10.1061/(ASCE)0733-9364(2005)131:9(953)
  • Abstract:
    Change orders represent one of the largest sources of cost growth on building construction projects. Field generated, or “unforeseen” change orders can also be highly disruptive to field productivity. Design-build delivery methods can potentially help minimize change orders on construction projects. This study was performed to closely examine the effects of delivery methods on the frequency and magnitude of change orders in mechanical construction, and how design-build business practices can be used to minimize the frequency of field generated chance orders. In a study of 598 change orders occurring on 120 construction projects performed by the same contractor, the total number of change orders was found to be close to the same on design-build and design-bid-build projects, however an 87% decrease in the average number of unforeseen change orders was observed on design-build projects versus design-bid-build projects. In addition, the average size of unforeseen change orders was 86% smaller on design-build projects. A detailed and qualified presentation of the research methodology and resulting data is provided. Key attributes and business practices leading to the results are discussed and practical applications of this research for owners and contractors are provided.

Wibowo, A and Kochendörfer, B (2005) Financial Risk Analysis of Project Finance in Indonesian Toll Roads. Journal of Construction Engineering and Management, 131(09), 963–72.

Yang, I (2005) Chance-Constrained Time–Cost Tradeoff Analysis Considering Funding Variability. Journal of Construction Engineering and Management, 131(09), 1002–12.