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The impact of change orders on mechanical construction labour efficiency

Author

Listed:
  • Awad Hanna
  • Jeffrey Russell
  • Paul Vandenberg

Abstract

Change orders impact many areas of a construction project. However, the impacts that change orders have on labour efficiency are much harder to quantify than other impacts and therefore are a significant risk to contractors. Little research has been completed in the past quantifying these impacts, so disputes are common between owners and contractors regarding the actual cost of change. This study used data from 43 projects to develop a linear regression model that predicts the impact of change orders on labour efficiency. The input factors needed for the model are (1) total actual project hours, (2) total estimated change hours, (3) impact classification, and (4) timing of change. The model calculates the labour loss in efficiency for a particular project so that owners and contractors will better understand the true impact of change on labour efficiency. The research is limited to the mechanical trade, but does include specific work in plumbing, HVAC, process piping, and fire protection.

Suggested Citation

  • Awad Hanna & Jeffrey Russell & Paul Vandenberg, 1999. "The impact of change orders on mechanical construction labour efficiency," Construction Management and Economics, Taylor & Francis Journals, vol. 17(6), pages 721-730.
    • Handle: RePEc:taf:conmgt:v:17:y:1999:i:6:p:721-730
    DOI: 10.1080/014461999371060
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    Citations

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    Cited by:

    1. Svetlana Besklubova & Xueqing Zhang, 2019. "Improving Construction Productivity by Integrating the Lean Concept and the Clancey Heuristic Model," Sustainability, MDPI, vol. 11(17), pages 1-32, August.
    2. Rafael Sacks & Michael Harel, 2006. "An economic game theory model of subcontractor resource allocation behaviour," Construction Management and Economics, Taylor & Francis Journals, vol. 24(8), pages 869-881.
    3. Janghwan Kim & Jeeyoung Lim & Hyoung-Chul Lim & Dae Young Kim, 2022. "Improving Sustainable Project Success Strategies Focused on Cost and Schedule for Electrical Construction Project Management," Sustainability, MDPI, vol. 14(5), pages 1-17, February.

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