Special levels of QCP inspection: how do they work?

The AQC (Acceptable Quality Limit) is an important sampling method that you will use when conducting product inspections in your plant. So, if you manufacture consumer products and you're researching PPKs, you've probably looked at the different levels of control on the PPK chart. You will find special control levels next to the general levels, and product inspectors use the general and special levels at the same time during an inspection.