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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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