ASQ ANSI Q3
Sampling Procedures and Tables for Inspection of Isolated Lots by Attributes
|Publication Date:||1 January 1988|
Sampling plans designated in this publication are applicable, but not limited, to inspection of the following:
a. end items
b. components and raw materials
d. materials in process
e, supplies in storage
f. data or records
g. administrative procedures
These plans are intended primarily for the inspection of isolated lots or batches. Type A lots are lots which both consumer and producer consider to be isolated. (Type A lots include mixed lots and lots with different date codes.) When Type A lots are to be sampled, Table Al shall be used. Type B lots are lots which the producer considers or knows to be a lot or part of a lot from a continuous production series, but which the consumer receives as an isolated lot with no preceding or follow-on lots. When Type B lots re to be sampled, Tables BI-BIO shall be used, provided that acceptable evidence of process control is presented. When no such evidence is presented the vendee is advised to use the sampling plans Table Al.
Inspection is the process of measuring, examining, testing, or otherwise comparing the unit of product with the requirements,
Inspection by Attributes
Inspection by attributes is inspection whereby either the unit of product is classified simply as conforming or nonconforming, or the number of non conformities in the unit of product is counted, with respect to a given requirement or set of requirements.
Unit of Product
The unit of product is the unit inspected order to determine its classifications conforming or nonconforming, or to count the number of nonconformities. It may be a single article, a pair, a set, a length, an area, an operation, a volume, a componeonf t an end product, or the end product itself. The unit of product may or may not be the samea s the unit of purchase, supply, production, or shipment.