BS 6001-4:1994

Committees responsible
National foreword
Specification
Section 1. General
1.1 Scope
1.2 Normative references
1.3 Definitions and symbols
1.4 Principle of a sequential sampling plan by
     attributes
Section 2. Choice of sampling plan
2.1 Choice between sequential, single, double and
     multiple sampling plans
2.2 Particular reservations on the inspection of small
     lots
2.3 Selection of a sampling plan
2.4 Pre-operation preparations
Section 3. Operation of a sequential sampling plan
3.1 Specification of the plan
3.2 Drawing of the sample
3.3 Cumulative count
3.4 Determination of acceptability
3.5 Operating characteristic curves and average sample
     size
3.6 Validity of approximations
Annexes
A (normative) Sequential sampling plans corresponding
     to ISO 2859-1 sampling plans
B (normative) Determination of the parameters of a
     sequential sampling plan
C (normative) Calculation of the operating
     characteristic curve and average sample siz
D (informative) Bibliography
Tables
1-A Sequential sampling plans for inspection for
     percent nonconforming for producer's risk alpha =
     0,05 and beta = 0,10
1-B Sequential sampling plans for inspection for
     nonconformities per 100 items for producer's risk
     alpha = 0,05 and consumer's risk beta = 0,10
2-A Sequential sampling plans for normal inspection for
     percent nonconforming (master table)
2-B Sequential sampling plans for tightened inspection
     for percent nonconforming (master table)
2-C Sequential sampling plans for normal inspection for
     nonconformities per 100 items (master table)
2-D Sequential sampling plans for tightened inspection
     for nonconformities per 100 items (master table)
3-A Curtailment values for sequential sampling plans
     for normal inspection for percent nonconforming
3-B Curtailment values for sequential sampling plans
     for tightened inspection for percent nonconforming
3-C Curtailment values for sequential sampling plans
     for normal inspection for nonconformities per 100
     items
3-D Curtailment values for sequential sampling plans
     for tightened inspection for nonconformities per
     100 items
4-A Average sample size for sequential sampling plans
     for normal inspection for percent nonconforming
4-B Average sample size for sequential sampling plans
     for tightened inspection for percent nonconforming
4-C Average sample size for sequential sampling plans
     for normal inspection for nonconformities per 100
     items
4-D Average sample size for sequential sampling plans
     for tightened inspection for nonconformities per
     100 items
Figures
1 Operating characteristic curve for a sampling plan
     with producer's risk alpha = 0,05 and consumer's
     risk beta = 0,10
2 Inspection record sheet for the sequential sampling
     plan considered in the example given in 2.4.3.1
3 Acceptance chart for the sequential sampling plan
     considered in the example given in 2.4.3.2
4 Inspection record sheet for the data of the example
     given in 3.4.1
C.1 Operating characteristic curve for the sequential
     sampling plan considered in example 1 of C.2.2
C.2 Operating characteristic curve for the sequential
     sampling plan considered in example 2 of C.2.2
C.3 Curve showing the average sample size for the
     sequential sampling plan considered in example 1 of
     C.3.3
C.4 Curve showing the average sample size for the
     sequential sampling plan considered in example 2 of
     C.3.3

Procedures and plans for sequential sampling by attributes indexed in terms of the producer\'s risk point and the consumer\'s risk point. Sampling plans and procedures indexed in terms of the acceptable quality level (AQL) are also given to supplement the plans in Part 1.