In general, we use random sampling inspections where the inspector will use AQL tables to produce the correct sample number. This allows us to randomly select a sample of products from a given batch which will be representative of the overall quality of the batch.
Not all inspections benefit from this method, though, and so other inspections, such as 100% inspections (where every piece is checked), are also provided.
If you're interested in defining your own sample sizes, try our free AQL calculator tool. to work out your own.