152
P. Jain and L. Varghese
respectively. For others, serial numbers such as 9, 11 and 13 rear brake failed at
39,000 km after 650 h, 60,000 km after 1000 h and 45,000 km after 750 h. The range
of distance travelled starts with 29,000–74,000 km with a time frame of 483.33–
12,333 h. running. Tables 6 and 7 represent the various calculation values for rear
brake reliability.
0
10000
20000
30000
40000
50000
60000
70000
80000
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Distance before failure (km)
Number of cars failed
Fig. 2 Rear brake system
Table 5 Details of time to failure for rear brake of system
S. No. of cars
Distance before failure (km)
Time to failure (h)
4
29,000
483.33
5
74,000
12,333.33
7
40,000
666.67
9
39,000
650
11
60,000
1000
13
45,000
750
Table 6 Median ranks of rear brake system
S. No.
Time to failure (h)
Median ranks (%)
1
483.33
10.93
2
650
26.56
3
666.67
42.18
4
750
57.81
5
1000
73.41
6
1233.33
89.06