Suppose that you have the following design data on an equipment item and that, b
ID: 3351347 • Letter: S
Question
Suppose that you have the following design data on an equipment item and that, based on these data, you may wish to accomplish a reliability prediction. What is the predicted MTBF? select the closest ans. a-e and show all work.
Component
Quantity of Parts Used
Failure Rate (% 1,000 hours)
A
16
0.135
B
75
0.121
C
32
0.225
D
44
0.323
E
60
0.120
F
15
0.118
G
28
0.092
a) 2196
b) 2263
c) 5460
d)4509
e)1420
Component
Quantity of Parts Used
Failure Rate (% 1,000 hours)
A
16
0.135
B
75
0.121
C
32
0.225
D
44
0.323
E
60
0.120
F
15
0.118
G
28
0.092
Explanation / Answer
Component Quantity Failure rate Quantity X Failure rate
A 16 0.135 2.16
B 75 0.121 9.075
C 32 0.225 7.2
D 44 0.323 14.212
E 60 0.120 7.2
F 15 0.118 1.77
G 28 0.092 2.576
---------------------------------------------------------------------------------------------
Total 44.193
MTBF = 1/sum of all part failure rates
= (1/44.193) X 100 X 1000 = 0.02263 X 100 X1000 = 2263
So,
Correct option:
(b) 2263
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