This paper considers a multicriteria decision-making problem with incomplete information about the importance of the criteria. For such a problem, a modification of the EDAS, COPRAS, and TOPSIS methods with interval weights is proposed and the concept of a fuzzy EDAS solution, COPRAS solution, and TOPSIS solution is introduced. As an example, the problems of selecting a steam boiler and an industrial robot are considered.
Kudryavtsev et al. (Mon,) studied this question.