Soltanifar, M.Sharafi, H.Hosseinzadeh Lotfi, F.Pedrycz, W.Allahviranloo, T.2024-05-192024-05-1920232198-4182https://doi.org/10.1007/978-3-031-30403-3_6https://hdl.handle.net/20.500.12713/4459What increases the power of a decision-making method as a decision support tool is the degree of satisfaction of its results. In many real-world issues, voters do not have an equal level of expertise. Since the classic voting models consider equal value for the votes of all the voters, it cannot give satisfactory results. This will reduce the power of preferential voting methods. In this chapter, group preferential voting methods are presented to handle the difference in the value of votes. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.eninfo:eu-repo/semantics/closedAccessBook Chapter471931082-s2.0-8515995764110.1007/978-3-031-30403-3_6Q4