“…A total of 82 papers were reviewed ranged from 2007 to April 2015. Our contributions to the literature are as follows: (1) to determine the MCDM approaches that have been integrated with IT2FSs, (2) to reveal application areas (education, energy, environment, healthcare, human resource management (HRM), investment management, manufacturing, risk management, technology management, transportation and logistics) that have further used these MCDM approaches based on IT2FSs, (3) to show the countries which published papers related to these MCDM approaches based on IT2FSs, and (4) to determine how the trend of type-2 fuzzy MCDM will continue in the future. The remainder of this paper is organized as follows.…”