Question
6.6 An electronic device is tested for two months and found to have a reliability of...
6.6 An electronic device is tested for two months and found to have a reliability of 0.990; the device is also known to have a constant failure rate.
(a) What is the failure rate?
(b) What is the mean-time-to-failure?
(c) What is the design life reliability for a design life of 4 years?
(d) What should the design life be to achieve a reliability of 0.950?
Homework Answers
Answer #1
For a constant failure rate, the life time 
has exponential distribution.
The reliability function is 
.
a) It is given that
The failure rate is 
b) The MTTF is
c)The design life reliability for a design life of 4 years (48 months) is
d) The design life be to achieve a reliability of 0.950 is
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