Modeling quality management in construction projects

Farnad Nasirzadeh, Mostafa Khanzadi, Abbas Afshar, Susan Howick

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


This research presents a dynamic mathematical system for modeling and simulating the quality management process in construction projects. Through sets of cause and effect feedback loops, all factors that internally and externally affect the quality management process are addressed. The proposed system integrates fuzzy logic with system dynamics simulation scheme to consider the uncertainties associated with the model parameters and estimation of the extra cost and time due to quality defects. Quantification of the consequences of the quality failures is performed based on the α-cut representation of fuzzy numbers and interval analysis. The proposed approach is efficient in modeling and analyzing a quality management process which is complex and dynamic in nature and involves various uncertainties. The proposed approach is implemented in a sample real submarine water supply pipe line project in order to evaluate its applicability and performance. The negative impacts resulting from quality failures are simulated. These negative impacts are mitigated by the implementation of alternative solutions.
Original languageEnglish
Pages (from-to)14-22
Number of pages9
JournalInternational Journal of Civil Engineering
Issue number1
Publication statusPublished - Mar 2013


  • system dynamics modeling
  • modeling simulation
  • quality management
  • fuzzy logic


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