Simple combinations of series and parallel subsystems (or components) can be analyzed by successively reducing subsystems into equivalent parallel or series components.
Figure 11.17 shows a parallel–series system that has a high-level redundancy. The equivalent reliability of the system with m parallel paths of n components each can be expressed as
Rsys is the equivalent reliability of system
Rn is the equivalent reliability of a path
R is the reliability of a component
n is the total number of ...