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Table 6 Part-worth utilities of lower-level

From: A nonlinear bi-level programming approach for product portfolio management

Attribute

Code

Attribute levels

\(u_{ikl}^{F}\)

Display

B11

13.3″ HD

1.54

B12

14.0″ HD

1.79

B13

15.6″ HD

2.33

Hard disk

B21

250 GB 5400 rpm hard drive

1.62

B24

2T 7200 rpm hard drive

1.81

Graphics card

B31

 Intel HD graphics

2.22

B34

NVIDIA GTX860 M 4 GB

2.99

Main board

B41

B85

1.47

B43

X99

2.69

Processer

B51

Intel core i5, 2 cores

2.33

B54

Intel core i7, 6 cores

3.83

Battery

B61

6-Cell lithium-ion

−0.82

B62

9-Cell lithium-ion

1.58

Memory

B71

4G DDR3

2.85

B72

8G DDR3

2.97

Case

B81

Metal

−0.89

B82

ABS

1.22