Table 6 Stepwise regression analyses between feasibility (dependent variable) and indicators of appropriateness (independent variables)

Step I

Simplicity

0.12873

1.40

0.1839

0.9685

Observability

−0.18122

−2.99

0.0105

Physical compatibility

0.57450

8.70

0.0000

Cultural compatibility

0.01298

0.15

0.8828

Need

−0.14108

−0.95

0.3587

Production sustainability

0.32268

2.79

0.0154

Cost

−0.25440

−3.21

0.0069

Step II

Simplicity

0.13259

1.56

0.1408

0.9684

Observability

−0.18348

−3.24

0.0059

Physical compatibility

0.57468

9.03

0.0000

Need

−0.13664

−0.98

0.3461

Production sustainability

0.33337

3.79

0.0020

Cost

−0.25550

−3.36

0.0047

Step III

Simplicity

0.14217

1.69

0.1121

0.9663

Observability

−0.18162

−3.21

0.0058

Physical compatibility

0.54338

9.90

0.0000

Production sustainability

0.31796

3.68

0.0022

Cost

−0.21539

−3.37

0.0042