en روش های تحلیل و تصمیم گیری Decision Analysis and Methods پژوهشي Research <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:115%"><span style="font-family:Aptos,sans-serif"><i><span lang="EN-AU" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">One of the most critical concerns in supply chain management (SCM) is supplier selection, which significantly impacts an organization&#39;s efficiency and market agility. Balancing ordinal and basic criteria in supplier selection has become increasingly crucial in recent years within SCM. This research presents three </span></span></span></i><i><span style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">multi-criteria decision-making</span></span></span></i><i><span lang="EN-AU" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""> (MCDM) methods including Fuzzy </span></span></span></i><i><span style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">analytic hierarchy process (AHP) </span></span></span></i><i><span lang="EN-AU" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">and Fuzzy </span></span></span></i><i><span style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">technique for order preference by similarity to ideal solution (TOPSIS) </span></span></span></i><i><span lang="EN-AU" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times="">methods to assess and select suppliers in oil and gas (O&G) industry. The critical criteria for supplier selection in the O&G sector have been reviewed in the literature and validated by experts actively working in the field. Initially, the Fuzzy AHP technique determines criterion weights and ranks suppliers. Subsequently, the Fuzzy TOPSIS approach is applied to rank prospective suppliers identified through objective evaluation. The findings show the capability of the utilized approaches in supplier selection procedure in O&G industry.</span></span></span></i></span></span></span></div> Supplier Selection,Oil and Gas Industry,Fuzzy AHP,Fuzzy TOPSIS,MCDM 52 67 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-921-3&slc_lang=en&sid=1 Mehdi Abdollahi Kamran mehdi.kamran@gutech.edu.om 1800319475328460013407 1800319475328460013407 No Department of Logistics, Tourism, and Services Management, German University of Technology in Oman, P. O. Box 1816, PC 130, Muscat, Oman Samira Afsharfar samira.afsharfar@gutech.edu.om 1800319475328460013408 1800319475328460013408 No Department of Logistics, Tourism, and Services Management, German University of Technology in Oman, P. O. Box 1816, PC 130, Muscat, Oman Fatma Al Mawali Al_Mawali345@gmail.com 1800319475328460013409 1800319475328460013409 No Department of Logistics, Tourism, and Services Management, German University of Technology in Oman, P. O. Box 1816, PC 130, Muscat, Oman Reza Babazadeh r.babazadeh@urmia.ac.ir 1800319475328460013410 1800319475328460013410 Yes Department of Industrial Engineering, Faculty of Engineering, Urmia University, Urmia, West Azerbaijan Province, Iran Marya Al Balushi marya.albalushi@gutech.edu.om 1800319475328460013411 1800319475328460013411 No Department of Logistics, Tourism, and Services Management, German University of Technology in Oman, P. O. Box 1816, PC 130, Muscat, Oman