ABSTRACT
The sampling plans presented in the foregoing chapters provide the basis for more sophisticated sampling designs. Sampling plans are frequently used in consort to produce levels of protection not attainable by any of the component plans individually. Such combinations of sampling plans are called sampling schemes or sampling systems. The International Organization for Standardization (ISO) in ISO 3534-2 (2006) has defined them as follows:
Acceptance sampling plan-a plan which states the sample sizes to be used and the associated criteria for lot acceptance.
