components in the standby configurations are assumed statistically similar but independent.
In many realistic models, all parts in standby are not treated as identical as they have
different failure possibilities. The operational structure of the system has subsystem-1 with
five identical components working under 2-out-of-5: G; policy, and the subsystem-2 has two
units and functioning under 1-out-of-2: G; policy. Failure rates of units of subsystems are …