BS 6002-1:1993

Committees responsible
National foreword
Specification
Section one. General
1 Scope and field of application
2 References
3 Definitions and symbols
4 Acceptable Quality Level (AQL)
5 Switching rules for normal, tightened and
       reduced inspection
6 Relation to ISO 2859
7 Non-continuous production and operating
       characteristic curves
Section two. Choice of sampling plan
8 Planning
9 Choice between variables and attributes
10 Choice of method
11 Choice of inspection level and AQL
12 Choice of sampling plan
Section three. Operation of a variables sampling plan
13 Preliminary operations
14 Standard procedure for "s" method
15 Standard procedure for "sigma" method
16 Procedure during continuing inspection
17 Normality and outliers
18 Records
19 Operation of switching rules
20 Discontinuation and resumption of inspection
21 Acceptance curves for tightened and reduced
       inspection
22 Switching to "sigma" method
Section four. Tables and diagrams
Tables
I-A Sample size code letters and inspection levels
I-B Sample size code letters and sample sizes for
       normal inspection
II-A Single sampling plans for normal inspection
       (master table): "s" method
II-B Single sampling plans for tightened inspection
       (master table): "s" method
II-C Single sampling plans for reduced inspection
       (master table): "s" method
III-A Single sampling plans for normal inspection
       (master table): "sigma" method
III-B Single sampling plans for tightened inspection
       (master table): "sigma" method
III-C Single sampling plans for reduced inspection
       (master table): "sigma" method
IV-s Values of fs for maximum sample standard
       deviation (MSSD): "s" method
IV-sigma Values of fsigma for maximum process standard
          deviation (MSPD): "sigma" method
V (V-B to V-P) Tables and operating characteristic
                curves for single sampling plans (sample
                size code letters B to P)
VI-A Correspondence between tightened and normal
       inspection plans
VI-B Correspondence between reduced and normal
       inspection plans
Diagrams
A Sample size code letters of standard sampling
       plans for specified qualities at 95 % and 10 %
       probabilities of acceptance
s-D to s-P Acceptance curves for combined double
            specification limits: "s" method
sigma-C to sigma-P Acceptance curves for combined
                    double specification limits: "sigma"
                    method
Annexes
A Procedures for obtaining s and sigma
B Statistical theory
C Sampling plans for "R" method
D Graph paper for the "s" method
Bibliography
Figures
1 Example of the use of an acceptance chart for a
       single specification limit: "s" method
2 Example of the use of an acceptance chart for
       separate double specification limits: "s" method
3 Acceptance curve for sample size code letter F,
       AQL = 1,5 %, MSSD = 2,76: "s" method
4 Example of the use of an acceptance chart for a
       combined double specification limit: "sigma"
       method
5 Normal distribution
6 Standardized normal distribution
7 Fraction nonconforming for constant sigma = 1
       and different values of the mean (mu1, mu2, mu3)
       in relation to a fixed lower specification limit
8 Acceptance chart for lower specification limit
       only, sigma and mu known
9 Acceptance chart for upper specification limit
       only, sigma and mu known
10 Acceptance chart for separate double
       specification limits, sigma and mu known
11 The effect on process fraction nonconforming of a
       change in mu, with sigma held constant
12 The effect on process fraction nonconforming of a
       change in sigma, with mu held constant
13 Contour in (sigma, mu) plane for p = AQL = 10 %
       nonconforming for a combined double specification
       limit
14 Acceptance chart for a combined double
       specification limit: "sigma" method
15 Acceptance chart for complex specification
       limits: "s" method
16 Graphical method for single or separate
       specification limits
17 Acceptance curve for code letter H, n = 25, AQL =
       4%, MAR = 70,7: "R" method
18 Graph paper for the "s" method

Establishes sampling plans and procedures for inspection by variables. Ensures that lots of an acceptance quality have a high probability of acceptance and that the probability of not accepting inferior lots is as high as possible. Coverage includes: definitions and symbols; non continuous production and operating characteristics curves; operation of switching rules; acceptance curves for tightened and reduced inspection. Also gives tables, diagrams and annexes.