MTBF: calculate series and parallel
Example: If there are two power supplies in a system, with the 2nd for redundancy, what does that do to the resulting statistical failure rate?
With each having an MTBF of 100 hrs, that's 1% chance of failure in 100 hrs.
But both is 0.01 x 0.01 = 0.01% or 10,000 hrs
See this detailed explanation below.
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