1 Scope
This standard specifies sampling plans and procedures for inspection by attributes of electrodeposited metallic coatings. It may be applied to related finishes by agreement between the supplier and the purchaser.
The sampling plans in this standard are applicable, but not limited, to the inspection of end items, components, materials in process and finished products in storage. The plans are intended primarily to be used for a continuing series of lots, but they may also be used for the inspection of isolated lots. However, the assurance given for isolated lots is lower than that given for a continuing series of lots.
This standard is not applicable to the sampling and testing of mechanical fasteners having electrodeposited metallic coatings or related finishes. In all the circumstances for which procedures for these components are specified in GB/T 90.1.
The sampling plans given in this standard are based on Acceptable Quality Level (AQL) of 1.5% and 4.0%. Other AQLs may be used if specified in the product specification.
It is also possible to formulate sampling plans based on inspection by variables.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 90.1 Fasteners — Acceptance Inspection (GB/T 90.1-2002, ISO 3269:2000, IDT)
GB/T 2828.1 Sampling Procedures for Inspection by Attributes — Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection (ISO 2859-1:1999, IDT)
GB/T 3358.1 Terms for Statistics — Part 1: Terms for General Statistics (neq ISO 3534-1)
GB/T 3358.2 Terms for Statistics — Part 2: Terms for Statistical Quality Control (neq ISO 3534-2)
3 Terms and Definitions
For the purpose of this standard, the term and definitions given in GB/T 3358.1, GB/T 3358.2 and the following apply.
Note: Some of these definitions are not identical with those in GB/T 3358.1 and GB/T 3358.2 but have been modified to make them easier to understand by non-statisticians and to make them more readily applicable to electroplated thems.
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Product Submission
5 Acceptance and Rejection
6 Selection of Samples (Sampling)
7 Sampling Plans
8 Determination of Acceptability
Annex A (Informative) Drawing of Samples
