Component 1 and Component 2 have a constant hazard rate with

Component 1 and Component 2 have a constant hazard rate with a MTBF = 320 hrs.

The Switch (Swt) is 98% reliable.

Component 3 failure distribution is Weibull with a shape parameter = 1.7 and a characteristic life = 300 hours.

Component 4 is Normally Distributed with a mean of 190 hours and a standard deviation of 21 hours. 2 of 3 of the units must be working

Component 5 has a constant hazard rate with a MTBF = 290 hours.

Component 6 has a constant hazard rate with a MTBF = 210 hours.

Component 7 has a constant hazard rate with a MTBF = 340 hours.

Solution

it isa measure of how reliable a hardware product or component is,For most components,the measure is typically in thousands or even tens of thousands of hours between failures.

It is unit hours divided by unit failures

availability is between 0.9895 and 0.9855

series MTBF 121.8

series availability 0.975

series downtime 9d53m3s

parallel downtime 1h19m21s

paralell availability 0.9998