From: Understanding the financial innovation priorities for renewable energy investors via QFD-based picture fuzzy and rough numbers
LSs for criteria
LSs for factors
Picture fuzzy numbers
µ
η
Ν
π
Very low (VO)
Weakest (K)
0.1
0.5
0.3
Low (O)
Poor (R)
0.2
0.4
Middle (D)
Fair (I)
High (G)
Good (GD)
0.6
0
Very High (VG)
Best (S)
0.8