  This paper proposes a grey interval relation TOPSIS for the decision making
in which all of the attribute weights and attribute values are given by the
interval grey numbers. The feature of our method different from other grey
relation decision-making is that all of the subjective and objective weights
are obtained by interval grey number and that decisionmaking is performed based
on the relative approach degree of grey TOPSIS, the relative approach degree of
grey incidence and the relative membership degree of grey incidence using
2-dimensional Euclidean distance. The weighted Borda method is used for
combining the results of three methods. An example shows the applicability of
the proposed approach.
