Attribute

Inspection of a sample from a lot to decide whether to accept that lot. There are two types: attributes sampling and variables sampling. In attributes sampling"," the presence or absence of a characteristic is noted in each of the units inspected. In variables sampling"," the numerical magnitude of a characteristic is measured and recorded for each inspected unit; this involves reference to a continuous scale of some kind.

The largest number of nonconformities or nonconforming items within a sample for acceptance sampling by attributes, permitting the acceptance of the lot as detailed in the acceptance sampling plan.

A specific plan that indicates the sampling sizes and associated acceptance or non-acceptance criteria to be used. In attributes sampling, for example, there are single, double, multiple, sequential, chain, and skip-lot sampling plans. In variables sampling, there are single, double, and sequential sampling plans.

Method of measuring quality that consists of noting the presence (or absence) of some characteristic (attribute) in each of the units under consideration and counting how many units do (or do not) possess it.

A discrete probability distribution useful to describe attributes data.