Acceptance Sampling Plans

1
????? ????????? ?????? ?? ???? ??? ????? ?
????? ??????Acceptance Sampling Plans

• ?. ???? ???????
• m_aichouni_at_yahoo.co.uk

????? ????? ??? ??????? ??????????? - 2004
2
?????

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

3
??? ???? ?????? ???????
4
??? ????? ?? ???? ??? ??????

• ????? ????? ( ??? 100 ?? ???????) 100
  Inspection
• ?? ????? ???? ???? ???? ????? ??????? (????????)
  ,
• ???? ??????? ??? ???? ???? ?????? ????? ?? ???
  ?? ???? ????? ???? ????? ?? ?? ?????? ? ??????
  (????????).
• ????? ???????? (????????)
• Sampling Plans

5
????? ???????? (????? ??????)Acceptance Sampling

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

6
???? ????? ???????? (????? ??????) Acceptance
Sampling
7
?? ?? ??? ??????? ?Sampling Plans

• ?????? ?? ????????? ???? ?????? ??????? ?? ??????
  ???????.
• ???? ??? ????? ?????? ??????
• ??? ??????
• ??? ?????? (??? ??????? ?? ??????) (n)
• ????? ( criteria (c) ) ???????? ???? ?? ????
  ???????? ???? ?? ???? ?? ???? ?????? ( Acceptance
  Number c) .
• ??? ?? ???? ???? ????? ??? ???? ?????? ????? ?
  ???????.

8
????? ???? ??? ????? Operating Characteristics
Curve

• ? ?? ????? ?? ????? ???? ?????? ???? ??????
  ??????? ????? ???? ????? ? ???? ????? ??? ??? ???
  ?????.
• ???? ??? ??????? ????? ??? ??????? ??? ???????
  ??? ???????? ????????? ???????? ? ????????.
• ??? ???? ??????? ??? ?????? ???? ??????? ?
  ??????.

9
????? ???? ??? ??????? ????? 100 Operating
Characteristics Curve 100 Inspection
10
????? ???? ??? ??????? ??? ?? 100 O C Curve
with less than 100 Inspection
11
???? ?????? ??????? (AQL) ? ???? ?????? ???????
?? (LTPD)

• ????? ?????? ??????? (Acceptable Quality Level
  AQL)
• ????? ?????? ?????? ?????? ???.
• ?????? (??????) ?? ???? ??? ?????? ????? ???? ???
  ?? ????? ?????? ??????? AQL.
• ???? ?????? ??????? ?? ?? ??????? (Lot tolerance
  percent defective (LTPD) )
• ????? ???? ????? ????.
• ???????? (??????) ?? ???? ?????? ????? ???? ??
  ???? LTPD

12
????? ?????? ?????? Risk Producers ? ??????
???????? Consumers Risk

• ?????? ?????? (?)
• ?????? ??? ????? ??? ???? ?????
• ?????? ??? ????? ??? ???? ???? ?????? ????? ?????
  ?????? ??????? AQL
• ?????? ???????? (ß)
• ?????? ???? ????? ??? ???? ????.
• ?????? ???? ????? ??? ???? ???? ?????? ????? ????
  ?????? ??????? ?? ?? ??????? LTPD

13
????? ???? ??? ????? (OC curve) ???? ??????
?????? ? ?????? ????????.
14
????? ???? ??? ????? ?????? ?? ??? ????? ??????
???????
??? ????? ??????
??? ?????? n 50 c 1 ??? ??????
100
n 100, c 2
P ?????? ???? ?? ???????
0
LTPD
AQL
???? ?????? ?? ???????
OC curve for two possible acceptance sampling
plans
15
????? ???? ??? ????? ???? ?? ??? ????? ??????
???????
16
????? ?????? ???????Average Outgoing Quality AOQ

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

17
????? ?????? ???????Average Outgoing Quality AOQ
Pd ?????? ???????? ?????? ?? ??????? Pa
?????? ???? ??????? N ??? ??????? ???????? ??
??????? n ??? ??????? ?? ?????? ????????
???? ?? ????? ???? ?????? ? ??? ????? ????
??????? AOQ
18
????? ??? ????? ????????

• ??? ????? ????????
• Single sampling plan by attributes
• ??? ????? ????????
• Double sampling plan by attributes
• ??? ????? ???????? (?????????)
• Sequential sampling plan

19
????? ??? ????? ???????? ???? ??????

• ??? ??? ?? ???? ??????? ??? ?????? ? ????????.
• ????? ?? ??? ??????? ?? ?????? ?????? ? ????????
  ? ??? ?? ???? ?????? ??? ?????? ???????? n ? ???
  ?????? c .
• ????? ?????????
• ??????? ??????? MIL-STD-105D
• ????? ???? ????? Dodge Romig Tables
• ???????? ????????? Statistical Formulas

20
????????? ??????? ?????? ?????????
21

• ????? ???? ???? ??? ??? ????????
• ?? ?? ????? ?