Reliability - PowerPoint PPT Presentation

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Title:

Reliability

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http://aichouni.tripod.com. ??????? ? ????? ????? ... ?? ???? ?????? ? ???????? ????? ?? ??? ??????? ?? ?? ?????? ??? ???? ??????? ... – PowerPoint PPT presentation

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Transcript and Presenter's Notes

Title: Reliability


1
????? ???????????????Reliability
  • ?. ???? ?????????
  • m_aichouni_at_yahoo.co.uk
  • http//aichouni.tripod.com

??????? ? ????? ????? ??? ??????? ??????????? ?
?????? ??????? ????? ? 2005
2
????? ?????? ?????? ?????????
  • ?? ???? ?????? ? ???????? ????? ?? ??? ???????
    ?? ?? ?????? ??? ???? ??????? ?????? ?? ????? ???
    ?? ?????.
  • ? ??? ??? ??? ??? ???? ???? ?????? ??? ????????
    ????? ??? ?????? ??? ?????? ?????? ????? ?????
    ?????. ? ??? ?? ???? ???????? ?????? (Product
    Reliability).
  • ??????? ?????? ?? ??????? ????? ????? ?????
    ?????.
  • (Reliability is quality over time)

3
????? ????????? ?? ??????
  • ??????? ??? ????? ?????????
  • ???????? ????? ???????? (1972)
  • ????? ???????? ?? ???? ????? ? ????? ??? ??????
    ????.
  • ????? ??????? ???? ???? ?? ?????? ?????? ??????.
  • ?????? ?? ????????? ?????? ????? ?????

4
????????? Reliability
  • ????????? ?? ????? ????? ?????? ??? ?? ?????
  • ??? ?? ?????? ?????? ?? ??? ?????? ??? ????
    ??????? ?????? ? ?????? ?? ?????.
  • ??????? ?????? ?? ?????? ??? ??? ?? ??????
    ?????? ???? ???? ????? ????? ? ??? ???? ??? ?????.

5
????? ????????? Reliability
  • ??????? ?????? ?? ????? ?????? ?????? ??? ????
    ??????? ???????? ??? ????? ?? ???? ??????? ?????
    ? ???? ????? ????? .
  • ???? ?? ????????? ??????? (Probability) ????
    ?????? ??????? ?????? ?? ????? ? ??? ????
    ????????? ???????.
  • ? ???? ???? ???? ??????? ???? ?????? ???????
    ?????? ?? ????? ? ???? ????? ?????.

6
??????? ???????? ?????????
  • ???? ??????? ?????? ??????? ???? ?????? ???????
    ?????? ?? ????? ? ??? ???? ????????? ??????? ?
    ???? ????? ?????.
  • ???? ????? ( Numerical Value) ???? ???????? ???
    ?????? ????? ?????? ? ??? ???? ?? ??????? ????
    ??? ????? .
  • ??????? ???????? ?? ?????? ( Intended Function)
  • ??? ????? ????? ??? ?????? ( Products Life)
  • ???? ????????? ( Environmental Conditions)

7
????? ????????? ?? ?????? ? ?? ??????
  • ?? ?????? ?????? ?? ??? ??????? ????? ????????
    ???? ?????? ?? ??????? (?????? ?????? ???? ?????
    ??????)? ??? ???? ?? ?????? ???????? ??? ??? ????
    ???? ????. ??? ??? ????? ??? ???????? ??? ???????
    ?????? ? ??? ?
  • ??????? ?????? ??? ??????? ?????
  • ????? ????? ?????? ? ??????? ??? ??? ???? ??
    ????????
  • ??????? ??? ??????? ??????? ????
  • ????? ????? ??????? ?? ?????? ??????? ? ?????
    ??? ???????? ??? ???? ?????? ??? ????? ???
    ????????
  • ??????? ?????? ?????? ????????? ? ?????? ????????
    ? ??????? ?????? ?????? ?? ???? ???? ???? ???
    ????? ???????.
  • ????? ???????? ??????? ??????? ???????? ?????? ?
    ???? ???? ????? ??????

8
??????? ?????? System Reliability
  • ???? ???????? ???????? ?? ????? ?? ?????? ??
    ???????? ????? ? ???? ????? ??????.
  • ?? ??????? ?? ???? ??? ??? ? ????? ????? ????????
    ?? ?????? ???? ??? ??????? ?????? ??? (?? ???????
    ?????? ).
  • ???? ????? ? ????? ????????
  • ????? ??? ??????? series (?????? ???? ??? ????
    ???? ????????)
  • ????? ??? ??????? parallel(?????? ???? ??? ???
    ???? ????)
  • ????? ????? ( ? ???? ?????????)

9
????? ???????? ??? ??????? Components in
Series
  • ??? ???? ???????? ????? ???????? ? ??? ??????
    ???? ??? ???? ???? ????????.
  • ?? ???? ???? ( N) ???? ?? ?????? ????? ?????????
    ? ??????? ?? ???? ?? (Ri ) ??? ??????? ??????
    Rs ???? ??? ???

Rs R1 x R2 x R3 x RN
???? ????? ?????? ?????? ??? ???????
10
????? ???????? ??? ??????? Components in
Parallel
  • ??? ???? ???????? ????? ???????? ??? ?????? ????
    ??? ??? ??? ????????.
  • ?? ???? ???? ( N) ???? ?? ?????? ????? ?????????
    ? ??????? ?? ???? ?? (Ri ) ??? ??????? ??????
    Rp ??

Rp 1 (1-R1) (1-R2) (1-RN)
???? ????? ?????? ?????? ??? ???????
11
???? ????? ??? ???? ???????
  • ??? ??? ?????? ????? ??? ???? ??????? ?????? ???
    ???? ??? ????? ????????.
  • ???? ??????? ?????? ????????
  • ? ???? ????? ??? ??????? ?????

Rp 1- (1-R1 ) (1-Rb)
Rp R1 Rb (1-R1)
12
??????? ??? ???? ????????? (???? 1)
???? ??????? ??????
  • ???????
  • ????? ?????? ?? 2 ?? ???????? ????? ??? ???????
  • ??????? ?????? Rs ??
  • Rs 0.95 x 0.95 0.9025

Rs R1 x R2
13
??????? ??? ???? ????????? (???? 2)
???? ??????? ?????? ?????? ?????
14
??????? ??? ???? ????????? ( ?? ?????? 2)
  • ???? ?????? ? ??? ????? ??????? ???????? ???? ??
    ??? ???????
  • R1 0.9 0.95 0.855
  • R2 0.95 0.95 0.9025
  • ? ?? ?? ???? ??????? ???????? ????????? ????
    ????? ?????
  • Rp 1-(1-R1)(1-R2)
  • 0.855 0.145 0.9025
  • Rp 0.855 0.130863 0.985863

15
????? ????? ??????? ???? (???? 3)
???? ??????? ?????? ?????? ?????
16
????? ????? ??????? ???? (?? ?????? 3)
1 ???? ?????? ? ???? ????? ??????? ????????
??????? ??? ???????
  • R1 0.9 0.95 0.855

R2 0.8 0.75 0.6
R3 0.9 0.95 0.9 0.7695
17
????? ????? ??????? ????
2 ???? ??????? ???????? ????????? 2 ? 3
  • Rp1 1 (1-R2)(1-R3)
  • 1 (1-0.6)(1-0.7695)
  • 1 0.4 x 0.2305
  • 0.9078

R1 0.855 R2 0.6 R3 0.7695
3 ???? ??????? ?????? (?????? ??? ???????)
Rp 1 (1-R1)(1-Rp1) 1
(1-0.855)(1-0.9078) 1 0.145 x 0.0922 Rp
0.9866310
18
??????? ??? ???? ????????? (???? ??)
??????? 1 - ???? ??????? ?????? ?????? ?? 3
?????? ????? ??? ??????? . ??????? ????????
?????? A, B, C ?? 0.95, 0.92, 0.90 ??????? 2
?? ?? ??????? ?????? ??? ???? ???????? ??????
????? ??? ???????.
19
??????? ??? ???? ????????? (???? ??)
??????? 3 - ???? ??????? ?????? ?????? ?????
??????? 4 - ???? ??????? ?????? ?????? ?????
20
??????? ??? ???? ????????? (???? ??)
??????? 5 ????? ???? ?? 5 ?????? ????? ???
??????? ? ??????? ?? ???? ????? 0.96 . ??? ?????
?????? ? ???? ????? ??? 3 ?????? ???. ?? ??
?????? ?? ??????? ??????.
21
  • ????? ??? ???? ????? ??? ????????
  • ? ?????? ? ?????? ??? ???? ??????? ???? ? ?????
    ???? ???? ???????? ? ????????
  • ?? ?? ??? ??? ?? ??? ??????? ?? ????????? ?? ???
    ?????? ?? ?????. ????? ?? ????? ??? ?????? ?
    ????? ?????? ?? ??????? ??????? ? ???????? ?
    ?????? ????????? ? ???????? ???????? ?? ????????
    ???????? ? ???????.
  • ?? ???? ??? ??? ???? ?????? ?????? ? ?? ????? ???
    ??? ????? ???? ? ?? ??? ???????.
  • ????? ????? ?? ?????? ? ?????? ??? ?????? ? ????
    ????.

22
??? ?? ???? ???? ??? ??? ???????? ???? ?????
??? ?? ?? ??? ??? ??? ????????? ? ??? ???? ????
?? ????? ???? ?? ???? ?? ???? ??? ? ???????? ?
??? ????? ? ?? ???? ??? ??????. ??? ????? ??? ??
???? ???? ????? ?? ???????? ??????? ?????? ???
??? ??? ?????? ?? ??????? ?????????? ????? ???
?????? www.arabicstat.com/forums/forum12/ ??
???????? ??? ?????? ??????????
m_aichouni_at_yahoo.co.uk
????? ?. ???? ??????
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