Reliability of a component An electronic circuit has an exponential reliability with a constant J.... rate.

1. Calculate the mean time (MTBF or MTTR), as weIl as the R(t) value at this mean time. Numerical value: J.... = 10-6.

2. Demonstrate that this MTBFIMTTF corresponds to the time which is at the intersection of the tangent at the origin of the curve with the time axis

(as indicated by Figure 7.3).

3. Explain why A is similar to a 'failure rate by unit of time'.

4. With another technology, the component has a failure rate equals to 10.7.

What is the relationship of the probabilities of these two vers ions when t = 104 hours?