A Combined Model for Change of Risk Management in Iran's Oil Industry Engineering and Construction Projects

In most execution schemes with various contractual patterns, changes in design and execution have become one of the main problems of project implementation, as many project management theorists have identified as one of the major risks affecting project success. Thus, providing a changes management model can play a key role in a more holistic approach to reducing risk and achieving project goals. For this purpose, unlike other conventional methods of risk assessment and modification, in this study, changes identified by four criteria: probability of occurrence, severity of effect, probability of detection and probability of determining appropriate response using Fuzzy FMEA fuzzy environment technique, The identified changes were prioritized and critical cases identified. Then, to evaluate the impact of other components on project objectives and to consider the interplay of these criteria with each other, it was combined with TOPSIS hierarchical structure method. The results show that engineering design changes are one of the most important factors contributing to the failure of EC projects. Also, poor planning risk is the most effective risk of planning and construction projects when planning ahead is delayed. Given that there are many EC projects currently underway in the Iranian oil industry that are at risk of changes, Using the results of this research can be useful in reducing the effects of unwanted changes and achieving project goals.