Upstream Oil Process Plants Turnaround Projects Risk Evaluation Using a Hybrid Fuzzy MADM Method

Process plants turnaround maintenance projects in upstream oil industry, which includes many capital-intensive installations and equipments, are very important. Accurate risk identification and evaluation of such project’s risks is an important step to significant decrease in financial, human and environmental damages of them. A new framework for such projects risk asessment is presented in this article. According to this framework, risks were identified according to expert’s judgment, using interviews and brain storming at first. Then, using fuzzy Delphi method, ten risks have been chosen as most important risks and then, analyzed using a hybrid fuzzy SWARA and EDAS method based on traoezodial fuzzy numbers. According to research   findings, on time financial providence from project owner with an appraisal score of 0.83 ranked the highest and equipment failure during operations with an appraisal score of 0.04 ranked the lowest among the oil upstream process plants turnaround project’s risks.