DS/ISO 2859-1:1992 Sampling procedures for inspection by attributes. Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection
This part of ISO 2859 specifies sampling plans and procedures for inspection by attributes of discrete items. It is indexed in terms of the Acceptable Quality Level (AQL).
Its purpose is to induce a supplier through the economic and psychological pressure of lot non-acceptance to maintain a process average at least as good as the specified AQL, while at the same time providing an upper limit for the risk to the consumer of accepting the occasional poor lot.
This part of ISO 2859 is not intended as a procedure for estimating lot quality or for segregating lots.
Sampling plans designated in this part of ISO 2859 are applicable, but not limited, to inspection of
a) end items;
b) components and raw materials;
c) operations;
d) materials in process;
e) supplies in storage;
f) maintenance operations;
g) data or records;
h) administrative procedures.
These plans are intended primarily to be used for a continuing series of lots sufficient to allow the switching rules to be applied, which provide for
— an automatic protection to the consumer, should a deterioration in quality be detected (by a switch to tightened inspection or discontinuance of inspection) ;
— an incentive to reduce inspection costs (at the discretion of the responsible authority) should consistently good quality be achieved (by a switch to reduced inspection).
Planerne kan ogs? benyttes til inspektion af enkeltst?ende varepartier, men i dette tilf?lde tilr?des det p? det kraftigste at bruge operationskarakteristikkurverne (OC kurverne) til at bestemme en plan, der vil yde den ?nskede beskyttelse (se 12.6). Ved bestemmelse af planer til inspektion af enkeltst?ende partier kan man ogs? bruge oversigten over stikpr?veplaner opstillet efter utilfredsstillende kvalitet (LQ), som er givet i DS/ISO 2859-2.
DS/ISO 2859-1:1992 history
2011DS/ISO 2859-1/Amd 1:2011 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
2001DS/ISO 2859-1+Cor.1:2001 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptable quality limit (AQL) for lot-by-lot inspection
1992DS/ISO 2859-1:1992 Sampling procedures for inspection by attributes. Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection