v. Sample. This is one or more units of product drawn from a lot or batch. Each
unit is selected randomly.
w. Sampling. Sampling is the process of selecting a small part of a lot or batch
for inspection or analysis. Acceptance or rejection of the lot is based upon the number
of defects or defective units found in the sample. The use of random sampling by the
inspector provides for a selection of samples without regard to quality, giving each unit
an equal chance of selection. Selection of a random sample is the personal
responsibility of the inspector. The vendor should be present when the samples are
selected, although failure of the vendor to appear is not a reason to stop the sample
selection. The vendor should not have a prior knowledge of the inspector's sample
selections. The sampling pattern chosen should be well protected, and varied to
prevent sample selection from falling into a set pattern.
x. Sample Size. The number of units of product selected to be a part of a
y. Sampling Plan. A plan that indicates the number of units of product from
each lot which are to be inspected and the criteria for determining the acceptability if the
lot. A sampling plan includes a sample size, acceptance number and rejection number.
z. Screening Inspection. Inspection in which each item of product is inspected
for designated characteristics and all defective items are removed.
aa. Skip Lot Inspection. A sampling technique that provides for the acceptance
of a lot without verification of its quality characteristics or compliance to contractual
bb. Sublot. A collection of units of a product contained within a lot.
cc. Variable. This is a quantity that may assume any one of a number of values.
A measurable quantity.