Development of automated change order impact detection and quantification system

Min Jae Lee, Boong Yeol Ryoo, Kenneth Sullivan, Awad S. Hanna

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


When change orders occur, adjustments in contract price and duration are usually agreed upon through negotiation or stipulated by contract terms and conditions. There are many pricing methods for change orders impact on productivity loss available, but negotiations using these methods do not always result in a contractor and client agreement. The most difficult issue to agree upon is how to quantify the cumulative impact of change orders on overall construction project. Cumulative impact claims imply that the disruption caused by a single change can have a ripple effect on the entire project, beyond the change itself. In order to recover cumulative impact damages, by law, the contractor is required to prove three basic components: liability, causation, and resultant injury (quantum). Of these elements, causation and resultant injury are the most difficult to prove. There has been some research performed to quantify the cumulative impact of change orders on labor productivity. CII and the University of Wisconsin have performed the most recent and extensive study related to this issue. This study used previous CII-Hanna research models to develop an automated system for the detection and quantification of change order impacts. In addition, a project demonstration is included to allow easy understanding for new system users. The developed system provides a simple guide for stakeholders to expedite the resolution of change order related disputes between contractors and owners by providing causation and resultant injury(quantum) analysis on troubled projects.

Original languageEnglish (US)
Pages (from-to)525-535
Number of pages11
JournalAutomation in construction
Issue number5
StatePublished - Aug 2009


  • Change orders
  • Detection and quantification system
  • Productivity impact

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Civil and Structural Engineering
  • Building and Construction


Dive into the research topics of 'Development of automated change order impact detection and quantification system'. Together they form a unique fingerprint.

Cite this