“…Some quantification of non‐monotonicity in a data set has been investigated in the works of Marsala and Petturiti and Milstein et al Suppose a data set contains n condition attributes and one decision attribute D . X is not monotone consistent if it contains at least a pair x i , x h ∈Ω satisfying one of following conditions: - ( i )( v ( A 1 , x i ),…, v ( A k , x i ))≤( v ( A 1 , x h ),…, v ( A k , x h )) and v ( D , x i )> v ( D , x h );
- ( ii )( v ( A 1 , x i ),…, v ( A k , x i ))≥( v ( A 1 , x h ),…, v ( A k , x h )) and v ( D , x i )< v ( D , x h ).
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