From: Determination of Target Values of Engineering Characteristics in QFD Using Uncertain Programming
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 | Engineering characteristics | EC1 | EC2 | EC3 | EC4 | EC5 |
 |  | x 1 | x 2 | x 3 | x 4 | x 5 |
 | EC1 | x 6 (α 1/6) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) |
 | EC2 | x 1/9 (α 9) | x 6 (α 1/6) | x 2 (α 1/2) | x 1/9 (α 9) | x 1/9 (α 9) |
Uncertain correlation matrix | EC3 | x 1/9 (α 9) | x 2 (α 1/2) | x 6 (α 1/6) | x 4 (α 1/4) | x 1/9 (α 9) |
 | EC4 | x 1/9 (α 9) | x 1/9 (α 9) | x 4 (α 1/4) | x 6 (α 1/6) | x 1/9 (α 9) |
 | EC5 | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 6 (α 1/6) |
Customer | Uncertain weighs of | Uncertain relationship matrix between customer requirements and engineering characteristics | ||||
requirements | customer requirements | Â | Â | Â | Â | Â |
CR1 \(\mathcal {Y}_{1}\) | x 4 (α 1/4) | x 6 (α 1/6) | x 1/9 (α 9) | x 2 (α 1/2) | x 1/9 (α 9) | x 1/9 (α 9) |
CR2 \(\mathcal {Y}_{2}\) | x 2 (α 1/2) | x 1/9 (α 9) | x 4 (α 1/4) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) |
CR3 \(\mathcal {Y}_{3}\) | x 2 (α 1/2) | x 1/9 (α 9) | x 1/9 (α 9) | x 6 (α 1/6) | x 1/9 (α 9) | x 1/9 (α 9) |
CR4 \(\mathcal {Y}_{4}\) | x 6 (α 1/6) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 6 (α 1/6) | x 1/9 (α 9) |
CR5 \(\mathcal {Y}_{5}\) | x 1/4 (α 4) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 1/9 (α 9) | x 4 (α 1/4) |
 | Units | dB | Horsepower | Gallon | Kg | M3 |
 | Comp1 | 80 | 75 | 0.042 | 23 | 0.18 |
 | Comp2 | 65 | 70 | 0.034 | 24 | 0.20 |
 | Comp3 | 65 | 80 | 0.028 | 23 | 0.18 |
Technical measures | Comp4 | 75 | 60 | 0.032 | 15 | 0.14 |
 | Comp5 | 95 | 80 | 0.030 | 20 | 0.19 |
 | Min | 60 | 60 | 0.027 | 15 | 0.14 |
 | Max | 95 | 90 | 0.042 | 25 | 0.21 |
 | Cost coefficients | \(\mathcal {L}(8,12)\) | \(\mathcal {L}(9,12)\) | \(\mathcal {L}(24,26)\) | \(\mathcal {L}(14,16)\) | \(\mathcal {L}(7,10)\) |