Modeling the effect of external sanctions on contractor's claims in DB project in IRAN

Claimed have became one of the inherent attribute of construction industry. In order to determine the most appropriate strategy for the prevention and resolution of these claims، some studies have been made to identify claim`s causes but they are common in construction industry. It seems that it needed to a better understand of complexity and the casual variables make these claims. In this regard، there will be sanctions and its possible effects on the construction industry in recent years، resulting in the creation of remarkable claims. A “cause and effect model” of the impact of sanctions on creating claims in DB project has developed by the information collected through interviews and study of documents related to the recent claims. then studied system is simulated under three Different scenarios of sanctions that The results show that incidence of sanctions influence other aspects of the project and will cause new claims and affect on time and cost as main cause of claims and This effect increases with the severity of sanctions and cause Vigorous growth and exponential claims.