IJE TRANSACTIONS C: Aspects Vol. 30, No. 9 (August 2017) 1375-1384    Article in Press

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S.M. Mousavi, Y. Dorfeshan, B. Vahdani and V. Mohagheghi
( Received: February 17, 2017 – Accepted: July 07, 2017 )

Abstract    Decision making is an important issue in business and management that assists finding the optimal alternative from a number of feasible alternatives. Decision making requires adequate consideration of uncertainty in projects. In this paper, in order to address uncertainty of project environments, interval type-2 fuzzy sets (IT2FSs) are used. In other words, the rating of each alternative and weight of each criterion are expressed by IT2FSs. Moreover, for obtaining weight of criteria, interval type-2 fuzzy AHP method is employed. In addition, a new enhanced model of multi-objective optimization on the basis of simple ratio analysis (MOOSRA) method is developed with interval type-2 fuzzy relative preference relation. Finally, to illustrate applicability of the introduced approach, an existing application from literature is adopted and solved.


Keywords    Project critical path problem, Relative preference relation, Interval type-2 fuzzy sets (IT2FSs), MOOSRA method


چکیده    تصمیم‏ گیری یک مساله مهم در کسب و کار و مدیریت است که به پیدا کردن آلترناتیو بهینه از بین آلترناتیوهای شدنی کمک می‏کند. تصمیم‏گیری نیاز به توجه کافی به عدم قطعیت دارد. در این مقاله، به منظور مواجهه با عدم قطعیت‏های موجود در پروژه، مجموعه‏ های فازی نوع 2 بازه‏ای استفاده می‏شود. به عبارت دیگر ارزیابی آلترناتیوها و وزن هر معیار به صورت اعداد فازی نوع 2 بازه‏‏ای بیان می‏شود. علاوه بر این، برای به دست آوردن وزن معیارها از روش وزن دهی فازی نوع 2 بازه‏ ای AHP استفاده می‏شود. به علاوه، یک مدل ترکیبی از روش MOOSRA به همراه ارتباط اولویت نسبی فازی نوع 2 بازه‏ ای توسعه داده می‏شود. در انتها برای نشان داده قابلیت روش معرفی شده یک مثال کاربردی موجود در مرور ادبیات حل می‏شود.

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