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 prevention and resolution of these claims, some studies have been conducted to identify claim`s causes but they are common in construction industry. it seems that the reason of making these claims is a better understanding of complexity and the casual variables. in this regard, one can refer to sanctions and their possible effects on the construction industry over 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 as well as the study of documents related to the recent claims. then, the studied system is simulated under three different sanction scenarios.  the results show that incidence of sanctions influence other aspects of the project and will cause new claims and affect time and cost as the main causes of claims and this effect increases with the severity of sanctions thereby casuing vigorous growth and exponential claims.