BS-5702-2-2008.pdf
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1、BS 5702-2:2008 Guide to statistical process control (SPC) charts for variables Part 2: Charts for individual values ICS 03.120.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Copyright British Standards Institution Provided by IHS under license with BSI - U
2、ncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 20:04:11 MDTNo reproduction or networking permitted without license from IHS -,-,- Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008
3、ISBN 978 0 580 53005 0 The following BSI references relate to the work on this standard: Committee reference SS/4 Draft for comment 05/30126058 DC Publication history First published April 2008 Amendments issued since publication Amd. no.DateText affected BS 5702-2:2008 Copyright British Standards I
4、nstitution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 20:04:11 MDTNo reproduction or networking permitted without license from IHS -,-,- BSI 2008i BS 5702-2:2008 Contents Foreword iii 1 Scope 1 2 Normative references 1 3 Terms,
5、 definitions and symbols 2 4 Role of control charts in process control and improvement 8 5 Classes of data and selection of appropriate chart 11 6 Control charts for individual measurements 12 7 Construction and use of standard individual and moving range control charts 14 8 Construction and use of
6、standard moving mean and moving range charts 25 9 Construction and use of median control charts 30 10 Construction and use of basic cusum charts 33 11 Construction and use of individual measurement cusum charts for process control 36 12 Construction and use of individual and moving range charts for
7、attribute data 37 Annexes Annex A (informative) Case studies for typical applications 45 Annex B (informative) Control chart templates 55 Annex C (normative) Relationship between Cpk and percentages and parts-per-million (ppm) out-of-specification 57 Bibliography 58 List of figures Figure 1 Applicat
8、ion sequence for process control, performance assessment and improvement 9 Figure 2 Focus on influential process characteristics rather than product yield 10 Figure 3 Road map for control charts 12 Figure 4 Provisional individual and moving range chart for silicon content in steel 19 Figure 5 Provis
9、ional control chart for silicon content 21 Figure 6 Provisional histogram of silicon content 22 Figure 7 Performance capability analysis using provisional data 22 Figure 8 Comparison of before and after results 24 Figure 9 Histogram and capability analysis of data after adjustment of mean 24 Figure
10、10 Spreadsheet-based moving mean and moving range control chart for silicon content 29 Figure 11 Median control chart for spend versus budget 32 Figure 12 Conventional individuals chart for spend versus budget 32 Figure 13 Basic cusum chart for % silicon content 34 Figure 14 Refined individuals cont
11、rol chart for % silicon content 35 Figure 15 Cusum chart for % silicon content in control mode 36 Figure 16 Cusum chart for nonconforming deliveries 39 Figure 17 np control chart for nonconforming deliveries 40 Figure 18 X control chart for nonconforming deliveries 40 Figure 19 Cusum chart for fabri
12、c nonconformities 41 Figure 20 Cusum chart for fabric nonconformities per roll 42 Figure 21 c chart for fabric nonconformities per roll 42 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 20:04
13、:11 MDTNo reproduction or networking permitted without license from IHS -,-,- BS 5702-2:2008 ii BSI 2008 Figure 22 c chart of outages per week 22 Figure 23 Individuals chart of system outage rate per month 44 Figure A.1 Individuals chart for strontium-90 in cows milk in UK location 47 Figure A.2 Ind
14、ividuals chart for caesium-137 in cows milk 48 Figure A.3 Individuals chart of daily fasting blood sugar levels 49 Figure A.4 Individuals chart for peak expiratory flow rate 51 Figure A.5 Cusum chart of the number of trades executed at the LSE per month 52 Figure A.6 Individuals chart of the number
15、of trades executed at the LSE per month 53 Figure A.7 FTSE all share index by month 54 Figure B.1 Individual and moving range control chart template 55 Figure B.2 Moving mean and moving range control chart template 56 List of tables Table 1 Key data for constructing a conventional individual and mov
16、ing range chart 16 Table 2 Key constants for control limits 16 Table 3 Provisional data for plotting of silicon content in steel 21 Table 4 Silicon content in steel data after adjustment 23 Table 5 Key data for constructing a moving average mean and moving range chart 27 Table 6 Key constants for co
17、ntrol limits 27 Table 7 % Silicon content provisional data 28 Table 8 Key data for constructing a median control chart 31 Table 9 Derivation of the medians for spend against budget 31 Table 10 Example of construction of cusum chart for % silicon content 34 Table 11 Count of system outages per week o
18、ver a period of one year 43 Table 12 Conversion of outage count per month to monthly outage rate 43 Table A.1 Strontium-90 in cows milk 46 Table A.2 Concentrations of caesium-137 in cows milk in a UK location 48 Table A.3 Daily fasting blood sugar levels (mg/dl) 49 Table A.4 Project desirables and a
19、ssociated means to improve asthma care 50 Table A.5 Daily readings of peak expiratory flow rate (PEFR): Days 110 50 Table A.6 Daily readings of peak expiratory flow rate (PEFR): Days 1120 51 Table A.7 Daily readings of peak expiratory flow rate (PEFR): Days 2130 52 Table C.1 Proportion of values exp
20、ected outside of an upper and lower limit in terms of values of capability indices for a normally distributed characteristic 57 Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 58, an inside back cover and a back cover. Copyright British Standa
21、rds Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 20:04:11 MDTNo reproduction or networking permitted without license from IHS -,-,- BSI 2008iii BS 5702-2:2008 Foreword Publishing information This part of BS 5702 was p
22、ublished by BSI and came into effect on 30 April 2008. It was prepared by Technical Committee SS/4, Statistical process control. A list of organizations represented on this committee can be obtained on request to its secretary. Relationship with other publications It is envisaged that, ultimately, B
23、S 5702 will consist of the following parts: Part 0: General introduction to control charts for measurements; Part 1: Charts for mean, median, range and standard deviation; Part 2: Charts for individual values; Part 3: Charting techniques for short production runs and small batches. BS 5702-2 is self
24、-contained in respect to the specific subject matter. It also provides essential links to, and is consistent in approach, format and style with, BS 5702-1 and BS 5702-3, BS 5701 Parts 1 to 4, BS 600 and BS 5703 Parts 1 to 4. Use of this document BSI permits the reproduction of Figure B.1 and Figure
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