Risk Evaluation and Prioritization in Bridge Construction Projects Using System Dynamics Approach

Abstract

Bridges are the indispensable arterial transport of a country. Iran, as a vast country, needs to develop a variety of road transportation inside and outside cities. Accelerating construction procedures and controlling costs are project management requirements. Risks, in many cases, disrupt the progress of the projects and impose costs on the project. The present article began with field studies, distribution of questionnaires, and the use of SPSS17 software to detect and prioritize the risk of bridge construction projects. Then, dynamic hypotheses were issued for prioritized risks, and causal loops were drawn. Subsequently, another questionnaire was designed to explore the relationship between risks and analyze risk behavior. After obtaining results from field research, the system dynamics and VENSIM7 software were used to model and investigate the behavior and interaction of risks. Finally, ten diagrams showing the effect of risks on each other were exemplified to examine and analyze the designed model.