A decision‐making methodology based on the weighted correlation coefficient in weighted extended hesitant fuzzy environments

Correlation is an important index in decision-making. In weighted extended hesitant fuzzy sets (WEHFSs) environment, researchers have only defined a class of correlation coefficients between WEHFSs with values the unit interval [ 0 , 1 ] . This not ideal because it does extend classical coefficient case sets. fact, negative − are ignored, and such neglectfulness leads to unreasonable results other words, existing definitions unconvincing lack consistency, which hinder their application potentials. article addresses this issue by introducing new Three decision-making methodologies based on compared respective The comparative analysis shows both efficiency effectiveness index.