This Japanese Industrial Standard specifies sequential sampling plans and procedures of inspection by variables of discrete items. It is complementary to JIS Z 9009. The plans in the main body of the standard are indexed in terms of the producerfs risk point and the consumerfs risk point. Annex A specifies sequential sampling plans and procedures indexed in terms of the acceptable quality level (AQL) to supplement the system of sampling plans in JIS Z 9015-1. The purpose of the Standard is to provide procedures based on a sequential assessment of inspection results, that may be used to induce the supplier through the economic and psychological pressure of non-acceptance of lots of inferior quality to supply lots of a quality having a high-probability of acceptance. At the same time the consumer is protected by a prescribed upper limit to the probability of accepting lots of poor quality.

ISO 8423:1991 - Identical