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?

Math   Statistics-And-Probability   
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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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