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

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1<br />

System<br />

Reliability<br />

λunit = 5x10-5 Example:<br />

/h<br />

MTBFunit = 20,000 hrs<br />

N-Parallel Redundancy<br />

0.5<br />

0<br />

20k<br />

(=MTBF)<br />

40k<br />

Operating<br />

time (hrs) 100k<br />

15<br />

- brute <strong>for</strong>ce: inefficient to achieve very high system reliability - 40 37<br />

10<br />

5<br />

Number of redundant units<br />

3<br />

0.5<br />

1<br />

©1995-1997 F.M.G. Dörenberg

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