Table 3:
Distribution of failure modes in groups.
Group code
Adhesive
Mixed
Cohesive
Premature failure
NC IX
8
1
1
0
PC IX
7
2
1
0
DB IX
9
1
0
0
SA IX
7
3
0
0
NC II
7
2
1
0
PC II
4
0
0
6
DB II
6
4
0
0
SA II
6
2
2
0