IEC 62058-11 : 1.0

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
   3.1 Sources of data
   3.2 Types of sampling
   3.3 Specifications, values and test results
   3.4 Types of inspection
   3.5 Types of acceptance sampling inspection
   3.6 Acceptance sampling inspection system aspects
   3.7 Acceptance criteria
   3.8 Types of operating characteristic curves
   3.9 Terms relating to operating characteristics
   3.10 Outgoing quality concepts
   3.11 Other terms
4 Symbols and abbreviations
   4.1 Symbols
   4.2 Acronyms
5 General
   5.1 The objectives of acceptance inspection
   5.2 Acceptance sampling plans, schemes and systems
   5.3 Practical and economic advantages of using standard
         sampling plans
   5.4 Agreement between the parties
   5.5 Selection of sampling schemes and sampling plans
   5.6 Considerations influencing a selection
         5.6.1 Long and short production runs
         5.6.2 Lot-by-lot inspection
         5.6.3 Isolated lot inspection
         5.6.4 Attributes versus variables
         5.6.5 Single and double sampling
         5.6.6 's' method and 'sigma' method
   5.7 Nonconformity and nonconforming items
   5.8 Classification of nonconformities
   5.9 Operating characteristic (OC) curve
   5.10 Producer's risks (PR) and consumer's risk (CR)
   5.11 AQL, PRQ, LQ and CRQ
   5.12 Switching rules for normal, tightened and reduced
         inspection
   5.13 Inspection level
   5.14 Sample size code letter
   5.15 Place of inspection
   5.16 Submission of product for acceptance inspection
   5.17 Drawing of samples
   5.18 Acceptability of lots
6 100 % inspection
   6.1 Application of the method
   6.2 Lot sizes and acceptance numbers
   6.3 Acceptance and non-acceptance
7 Lot-by-lot inspection by attributes
   7.1 Application of the method
   7.2 Drawing of samples
   7.3 Inspection level
   7.4 Sampling plans
         7.4.1 Obtaining a sampling plan
         7.4.2 Single sampling plans
         7.4.3 Double sampling plans
         7.4.4 Determination of acceptability
   7.5 Normal, tightened and reduced inspection
         7.5.1 Start and continuation of inspection
         7.5.2 Normal to tightened
         7.5.3 Tightened to normal
         7.5.4 Normal to reduced
         7.5.5 Reduced to normal
         7.5.6 Discontinuation and resumption of inspection
   7.6 Operating characteristic (OC) curves
   7.7 Process average
   7.8 Average outgoing quality (AOQ)
   7.9 Average outgoing quality limit (AOQL)
   7.10 Consumer's risk (CR)
   7.11 Producer's risk (PR)
8 Isolated lot inspection
   8.1 Application of the method
   8.2 Procedures specified
         8.2.1 Procedure A
         8.2.2 Procedure B
   8.3 Limiting quality
   8.4 Procedure A
   8.5 Procedure B
   8.6 Rules for acceptance and non-acceptance
9 Skip-lot inspection
   9.1 Application of the method
   9.2 Manufacturer qualification
   9.3 Product qualification
   9.4 Detailed procedures
10 Lot-by-lot inspection by variables
   10.1 Application of the method
   10.2 Choice between the 's' and the 'sigma' methods
   10.3 Standard plans
   10.4 Preliminary operations
   10.5 Standard multivariate 's' method procedures for
         independent quality characteristics with combined
         control
         10.5.1 General methodology
         10.5.2 Sampling plans
         10.5.3 Description of the procedure
         10.5.4 Simplified exact formula for the 's' method with
                 sample size 4
         10.5.5 Approximate procedure for the 's' method for
                 n >= 5
   10.6 Standard multivariate ' s' method procedures for
         independent quality characteristics with combined
         control
         10.6.1 General methodology
         10.6.2 Sampling plans
         10.6.3 Description of the procedure
   10.7 Procedure during continuing inspection
   10.8 Normality and outliers
         10.8.1 Normality
         10.8.2 Outliers
   10.9 Records
         10.9.1 Control charts
         10.9.2 Lots that are not accepted
   10.10 Normal, tightened and reduced inspection
   10.11 Discontinuation and resumption of inspection
   10.12 Switching between the 's' and 'sigma' methods
         10.12.1 Estimating the process standard deviation
         10.12.2 State of statistical control
         10.12.3 Switching from the 's' method to the 'sigma'
                 method
         10.12.4 Switching from the 'sigma' method to the 's'
                 method
   10.13 Consumer protection
   10.14 Operating characteristic curves
   10.15 Consumer's risk (CR)
   10.16 Producer' risk (PR)
Annex A (normative) Random numbers
Annex B (normative) Procedure for obtaining s or sigma
Bibliography

Applies to newly manufactured electricity meters produced and supplied in lots of 50 and above.