x (availability of component B) x (availability of component C)

Therefore, the combined availability of multiple components in a series is always lower than the availability of individual components.

On the other hand, the following formula applies to parallel components:

Availability of parallel components = 1 - (1 - availability of component A) X (1 - availability of component B) X (1 - availability of component C)In corollary, if you have N parallel components each having X availability, then:

Availability

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