The population of old and unreliable switches have been replaced by a group of 50 new components. After two years of operation (730 days), the following failure times of 10 switches (in days) are recorded while the remaining switches are still working. 209 221 263 323 343 486 500 595 610 702
(a) Compute the failure rate and the corresponding mean time to failure (MTTF).
Now, assume the estimated MTTF in part (a) belongs to a certain switch and its mean time to repair (MTTR) is also known to be equal to 250 days.
(b) Compute switch repair rate, availability, and unavailability.