Farnad Nasirzadeh - Iran University of Science and Technology
Abbas Afshar - Iran University of Science and Technology
Mostafa Khanzadi - Assistant Professor Iran University of Science and Technology

This paper presents a system dynamic based approach for construction quality management. The dynamic process of quality management is modeled using system dynamics technique. It is shown that the effectiveness of system dynamics as a methodology for modeling and simulating construction process can be significantly increased if it is extended to deal with imprecise variables as well as the vague interdependencies. For this purpose, the imprecise variables affecting the quality management process may be treated as fuzzy sets and the vague and imprecise dependencies between the variables may be considered using fuzzy logic. The additional expenditures caused by the quality defects are simulated and quantified using the proposed non- deterministic system dynamics approach.

Quality Management, System Dynamics, Decision Making, Fuzzy Logic