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Integrated and Modular Systems for Commercial ... - Nonstop Systems

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MTTF n-parallel ∝ ln(n) x MTTF unit<br />

=<br />

MTTF n<br />

MTTF 1<br />

MTTF as function of redundancy level<br />

3<br />

2<br />

1<br />

from n=1 2<br />

practical limit<br />

1 5 10 15 0<br />

- diminishing returns -<br />

(curves do not account <strong>for</strong><br />

rel. penalty of complexity)<br />

Number of<br />

Parallel units<br />

0.5<br />

=∆ MTTF<br />

42<br />

©1995-1997 F.M.G. Dörenberg

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