Repairable System Test Design Example - Solve for Sample Size

We can obtain the required number of units by using the Design of Reliability Tests (DRT) tool in the RGA software. Since this is a demonstration test then $\beta =1\,\!$, and no growth will be achieved. The results are shown next. It can be seen that in order to demonstrate a 10,000 hours MTBF with 80% confidence, 5 test units will be required.