Sample 
Part of a whole that reflects the quality of the whole and that is to be examined in an inspection.
The sample category describes the use of the sample. The following sample categories exist:
Primary samples are samples that are taken directly from a material or batch. They are then inspected or used to form pooled samples.
Pooled samples are samples that are formed by combining two or more primary samples taken from the same material or batch.
Reserve samples are primary samples of a material or batch that are reserved for a later inspection.
If you have assigned a sample-drawing procedure to an inspection rule, the system automatically creates samples when it creates an inspection document based on this inspection rule. You can also create samples manually.