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Content
Content (en)
Foreword
Introduction
Scope
Normative references
Terms and definitions
Symbols and abbreviated terms
Sampling plans
General
Applicability
Lot mean
Standard deviations
Inspection lots
Standardized sampling procedures
General
Increment sampling (see Figure 1)
Constitution of composite samples (see Figure 1)
Preparation of test samples (see Figure 1)
Measurements (see Figure 1)
Standard deviations
General
Standard deviation between sampling increments
Standard deviation between test samples
Measurement standard deviation
Costs
General
Components of costs
Cost of taking a sampling increment
Cost of preparing a test sample
Cost of a measurement
Procedures for cases when cost values are insufficiently known
Acceptance quality limit and non-acceptance quality limit
General
Interval between m and specification limit
Discrimination interval
Interval between acceptance quality limits
Responsible authority
Functions
Contractual relationship
Inspection procedures
General
Assessment of the standard deviations
General
Confirmation procedures
Standard deviations
Control charts
General
s control chart
s control chart
s control chart
Re-estimation of population standard deviations
General
Constant sample sizes
Varying sample sizes
Re-estimation of variance components
General
Variance component between sampling increments
Variance component between test samples
Estimate standard deviation
Action for out-of-control
Imprecise standard deviations
Determination of sample sizes
Procedures to obtain sample sizes
Calculation of n
Use of known standard deviations
Use of imprecise standard deviations
Test sample standard deviation
Relative standard deviations
Cost of treating a test sample
Cost ratio and cost ratio level
Determination of n and n
Structure of tables
Selection of tables
Reading tabulated values of n and n
Reconsideration of the discrimination interval
Selection and preparation of samples
General
Submission of a lot
Taking of sampling increments
Constitution of composite samples
Preparation of test samples
Measurements
Determination of the lot acceptability
Disposition of a non-acceptable lot
Determination of the acceptance value
Standard procedures
One-sided specification limit
Two-sided specification limits
Optional procedures for 5 % risks and procedures for imprecise standard deviations
Determination of lot acceptability
Obtaining sample averages
Test sample averages
Composite sample averages
Sample grand average
Lot acceptability
Examples
Imprecise standard deviation with one-sided specification limit
Imprecise standard deviation with two-sided specification limits
Optional procedure for known standard deviation with one-sided specification limit
Known standard deviation with one-sided specification limit
Known standard deviations with two-sided specification limits
Revision of discrimination interval
Results from one lot
Determination of acceptability
Lot acceptability
Calculation of standard deviations (sample values)
Comparison with U
Results from consecutive lots
Determination of acceptability
Comparison with U
Re-estimation of population standard deviations
n
d and d
n and n
New sampling plan
Special procedures for inspecting multiple characteristics of a material (normative)
General introduction
General procedures for inspecting multiple characteristics
Composite samples
Test samples
Separate sample preparation
Overall risks and special procedures
Special procedures for known standard deviations
General procedure for each characteristic
Overall adjustment
Individual risks and OC curves
Example
Inspection of three characteristics
Required n
Special procedures for imprecise standard deviations
For each characteristic
Overall adjustment
Example
Acceptance sampling plans and procedures for use where the measurement standard deviation is dominant (normative)
General introduction
Standard deviations
Respective standard deviations
Overall standard deviation
Relative overall standard deviation
Costs
Sample sizes
Number of composite samples
Determination of n and n
n
Confirmation of standard deviations
General
Combined sample standard deviation
Control charts
Combined variance between test samples
Estimate standard deviation
Examples
Known standard deviation
Imprecise standard deviation
Theoretical background (informative)
General introduction
Basic assumptions
General
“Known” standard deviations
Control charts
Normality
Representative sampling
Laboratory
Infinite population
Simple population
Single quality characteristic
The simplest model
General
Estimate standard deviation
Sample sizes
Relationship between m, m and acceptance value
General
One-sided lower specification limit
One-sided upper specification limit
Two-sided specification limits
Two-component model
General
Estimate standard deviation
Sample sizes
Three-component model
Multiple characteristics
Overall risks
OC curve
Independence
Supplementary information for imprecise standard deviations
General
Relationship between m, m and acceptance value
Multiple characteristics
Overall risks
OC curve
Operating characteristic curves (informative)
General introduction
Known standard deviations
Necessity of the estimate standard deviation
Standard procedures
Special procedures given in annex A
Converting m to P
One-sided specification limit
Two-sided specification limits
General
Maximum probability of acceptance
Probability of acceptance for general values of m
Converting P to m
One-sided specification limit
Two-sided specification limits
Examples for calculating OC curves for known standard deviations
Example 1: Lower specification limit
Example 2: Known and dominant standard deviation of measurement
Example 3 — Two-sided specification limits
Imprecise standard deviations
Estimate standard deviation
Converting m to P
One-sided specification limit
Two-sided specification limits
Converting P to m
One-sided specification limit
Two-sided specification limits
Example 4: Calculation of an OC curve for the method using an estimated standard deviation
Bibliography
ICS
03.120.30
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