Service Station Evaluation Problem in Catering Service of High-Speed Railway: A Fuzzy QFD Approach Based on Evidence Theory

Figure 6

Illustrative example of Belief and Plausibility measures.

(a) C-BOE + crisp set

(b) C-BOE + fuzzy set

(c) N-BOE + crisp set: the core of is contained in

(d) N-BOE + crisp set: the core of is not contained in

(e) N-BOE + fuzzy set: using (7) and (8)

(f) N-BOE + fuzzy set: using (9)

(g) M-BOE+ crisp set

(h) M-BOE fuzzy set