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 acceptance quality limit, while at the same time providing an upper limit for the risk to the consumer of accepting the occasional poor lot.
This second edition of ISO 2859-1 cancels and replaces the first edition (ISO 2859-1:1989) of which it constitutes a technical revision.
It is highly recommended that this part of ISO 2859 be used together with ISO 2859-0, which contains illustrative examples.
A technical corrigendum was issued for this standard after its publication. To request this FREE document, please email us.