| acceptable quality level (AQL) | for a given sampling plan, a specified quality level for which there is a low probability of rejecting a good lot.
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| acceptance number | in attributes sampling, for a given sample size, the maximum number of allowable defectives for acceptance.
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| acceptance sampling | form of inspection applied to lots or batches of items before or after process, to judge conformance with predetermined standards.
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| attribute | a characteristic that has just two choices, e.g., defective or acceptable.
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| average outgoing quality (AOQ) | given a particular acceptance sampling plan, a function showing the average quality level of the outgoing lot, as a result of replacing defective units found in sampling by good ones.
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| conformance | the characteristics of the product satisfy the established standards.
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| consumer's risk | the probability that a lot that has a quality equal to the lot tolerance percent defective will be accepted, or passed; also known as a Type II error.
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| inspection | examining material in process or finished products to determine conformance to standard.
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| lot tolerance percent defective (LTPD) | for a given sampling plan, a specified quality level for which there is a low probability of accepting a bad lot.
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| operating characteristic (OC) | a mathematical function that yields, for a given sampling plan, the probability of accepting the lot, as a function of the percent defective.
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| producers risk | the probability that a lot that has an acceptable quality level will be rejected; also known as a Type I error.
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| quality | a measure of the conformance of a product to an established standard; quality may be defined either quantitatively or quantitatively.
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| sampling plan | a procedure that identifies a lot as being of either acceptable or rejectable quality. A typical acceptance sampling plan would specify for a given lot size, the sample size and the maximum number of allowable defects for acceptance.
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| Type I error | rejecting a good lot; symbolized by α.
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| Type II error | accepting a bad lot as good; symbolized by β.
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