406
K. Gawhade et al.
Table 1
Pugh matrix
Concepts
Concept 1
Concept 2
Concept 3
Concept 4
Concept 5
Selection
criteria
Weight
(%)
Rating
Weighted
score
Rating
Weighted
score
Rating
Weighted
score
Rating
Weighted
score
Rating
Weighted
score
Production
cost
25
5
1.25
4
1.00
2
0.50
3
0.75
4
1.00
Folding and
unfolding time
of stairs
15
3
0.45
5
0.75
4
0.60
4
0.60
4
0.60
Ease of
operating
20
2
0.40
4
0.80
5
1.00
4
0.80
3
0.60
Compactness 15
2
0.30
4
0.60
5
0.75
3
0.45
4
0.60
Product life
25
2
0.50
4
1.00
4
1.00
4
0.20
4
1.00
Total score
2.90
4.15
3.85
2.80
3.80
Rank
4
1
2
5
3
Continue
No
Develop
No
No
No