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Fig. 6. Reliability structure: a) series-parallel; b) parallel-series
Reducing further blocks systems using the replacement blocks describing a
serial or parallel structure allows achieving a simple reliability structure. Il-
lustration of this process for the exemplary complex reliability structure is
shown in Fig. 7. Presented in Fig. 7A system is composed of the elements
E 1 ,E 2 ,E 3 ,E 4 ,E 5 . In the first step (Fig. 7B), elements
E 1 ,E 2 which form a
parallel structure equivalent substitute block
E 12 are reduced.
Fig. 7. Reduction of an exemplary complex system
Then (Fig. 7C) blocks
E 12 and
E 3 forming a serial reliability structure (an
equivalent of
E 123 substitute block) are reduced. Subsequently (Fig. 7D) parallel
blocks
E 123 and
E 4 are reduced, which results in the replacement block
E 1234
(Fig. 7E). As a final step of the procedure
E 1234 and
E 3 blocks are reduced to
the final replacement block
E 12345 (Fig. 7F).
In Fig. 8 bridge reliability structure is shown. This structure consists of 5
elements, among which: the elements
E 1 and
E 2 are the input elements; elements
 
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