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The Reliability of Periodically Repaired n − I/n Parallel Redundant Systems

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1 Author(s)
R. G. Cantarella ; Burroughs Corporation, FSSG

The average failure rate of an n − 1/n parallel redundant system of n identical elements, each of which has a constant failure rate of λ, that is repaired every T hours can be approximated by the upper bound n(n − 1)λ2T/2. If λT < 1, the ratio of the upper bound to the actual average failure rate is less than or equal to I + (n −)λT/I − λT/2. These formulas provide a convenient method for predicting the reliability of such systems with a quantitative error bound.

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IEEE Transactions on Computers  (Volume:C-32 ,  Issue: 6 )