BS-6002-1-2007.pdf
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1、BS 6002-1:2007 Sampling procedures for inspection by variables Part 1: Guide to single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a single AQL ICS 03.120.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRI
2、GHT LAW BRITISH STANDARD Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI
3、 2007 ISBN 978 0 580 50163 0 The following BSI references relate to the work on this standard: Committee reference SS/5 Draft for comment 05/30134582 Publication history First published as BS 6002, May 1979 First published as BS 6002-1, November 1993 Revised February 2007 Amendments issued since pub
4、lication Amd. no.DateText affected BS 6002-1:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 2007i BS 6002-1:2007 Contents Foreword v Introduction 1 1Scope 3 2Normative references 3 3Terms and definiti
5、ons 4 4Symbols 6 5Acceptance quality limit (AQL) 8 6Switching rules for normal, tightened and reduced inspection 9 7Relation to BS 6001-1 9 8Limiting quality protection 11 9Planning 12 10Choice between variables and attributes 12 11Choice between the “s” and “” methods 13 12Choice of inspection leve
6、l and AQL 14 13Choice of sampling plan 14 14Preliminary operations 15 15Standard procedure for the “s” method 16 16Standard procedure for the “” method 26 17Procedure during continuing inspection 29 18Normality and outliers 30 19Records 30 20Operation of switching rules 31 21Discontinuation and resu
7、mption of inspection 31 22Switching between the “s” and “” methods 32 23Chart A Sample size code letters of standard single sampling plans for specified qualities at 95% and 10% probabilities of acceptance 33 24Charts B to R Operating characteristic curves and tabulated values for single sampling pl
8、ans, normal inspection: “s” method 34 25Charts s-D to s-R Acceptance curves for combined control of double specifications limits: “s” method 64 Annexes Annex A (normative) Table for determining the sample size code letter 77 Annex B (normative) Form k “s” method single sampling plans 78 Annex C (nor
9、mative) Form k “” method single sampling plans 81 Annex D (normative) Values of fs for maximum sample standard deviation (MSSD) 84 Annex E (normative) Values of f for maximum process standard deviation (MPSD) 87 Annex F (normative) Estimating the process fraction nonconforming for sample size 3: “s”
10、 method 88 Annex G (normative) Type p* single sampling plans 91 Annex H (normative) Values of cu for upper control limit on the sample standard deviation 92 Annex I (normative) Supplementary acceptability constants for qualifying towards reduced inspection 93 Annex J (normative) Procedures for obtai
11、ning s and 94 Annex K (informative) Consumers risk qualities 96 Annex L (informative) Producers risks 100 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 6002-1:2007 ii BSI 2007 Annex M (informative) Operati
12、ng characteristics for the “” method 104 Annex N (informative) Estimating the process fraction nonconforming for sample sizes 3 and 4: “s” method 105 Bibliography 107 List of figures Figure 1 Example of the use of an acceptance chart for a single specification limit: “s” method 19 Figure 2 Example o
13、f the use of an acceptance chart for combined control of double specification limits: “s” method with actual scales 25 Figure 3 Example of the use of an acceptance chart for combined control of double specification limits: “s” method with normalized scales 26 List of tables Table A.1 Sample size cod
14、e letters and inspection levels 77 Table B.1 Single sampling plans of Form k for normal inspection: “s” method 78 Table B.2 Single sampling plans of Form k for tightened inspection: “s” method 79 Table B.3 Single sampling plans of Form k for reduced inspection: “s” method 80 Table C.1 Single samplin
15、g plans of Form k for normal inspection: “” method 81 Table C.2 Single sampling plans of Form k for tightened inspection: “” method 82 Table C.3 Single sampling plans of Form k for reduced inspection: “” method 83 Table D.1 Values of fs for maximum sample standard deviation for combined control of d
16、ouble specification limits: normal inspection, “s” method 84 Table D.2 Values of fs for maximum sample standard deviation for combined control of double specification limits: tightened inspection, “s” method 85 Table D.3 Values of fs for maximum sample standard deviation for combined control of doub
17、le specification limits: reduced inspection, “s” method 86 Table E.1 Values of f for maximum process standard deviation for combined control of double specification limits: “” method 87 Table F.1 Estimated process fraction nonconforming, p , as a function of the quality statistic Q 88 Table G.1 Maxi
18、mum allowable values, p*, of the estimated process fraction nonconforming for sample sizes 3 and 4: “s” method 91 Table H.1 Values of cu for upper control limit on the sample standard deviation 92 Table I.1 Supplementary acceptability constants for qualifying towards reduced inspection 93 Table K.1.
19、s Consumers risk quality (in percent) for normal inspection: “s” method 97 Table K.1. Consumers risk quality (in percent) for normal inspection: “” method 97 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI
20、2007iii BS 6002-1:2007 Table K.2.s Consumers risk quality (in percent) under tightened inspection: “s” method 98 Table K.2. Consumers risk quality (in percent) for tightened inspection: “” method 98 Table K.3.s Consumers risk quality (in percent) under reduced inspection: “s” method 99 Table K.3. Co
21、nsumers risk quality (in percent) for reduced inspection: “” method 99 Table L.1.s Producers risk (in percent) for normal inspection: “s” method 101 Table L.1. Producers risk (in percent) for normal inspection: “” method 101 Table L.2.s Producers risk (in percent) for tightened inspection: “s” metho
22、d 102 Table L.2. Producers risk (in percent) for tightened inspection: “” method 102 Table L.3.s Producers risk (in percent) for reduced inspection: “s” method 103 Table L.3. Producers risk (in percent) for reduced inspection: “” method 103 Summary of pages This document comprises a front cover, an
23、inside front cover, pages i to vi, pages 1 to 108, an inside back cover and a back cover. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv BSI 2007This page deliberately left blank BS 6002-1:2007 Licensed Cop
24、y: London South Bank University, London South Bank University, Thu Mar 01 06:26:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 2007v BS 6002-1:2007 Foreword Publishing information This part of BS 6002 was published by BSI and came into effect on 28 February 2007. It was prepared by Technical Comm
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