5. For a constant failure rate, mission reliability is given by:

-λt

R(t)

A system has a failure rate of 5 failures per million hours.

= e

What is the mission reliability for 5,000 hours?

The system survives that 5,000 hours.

If the system survives that first 5,000 hours, assuming the failure rate is

still constant, what is the probability of surviving the next 5,000 hours?

(Hint: Don't forget about the 10-6 factor in the failure rate.)