The quality assurance system is based on statistical quality control methods. All products are tested in accordance with IEC 410/IEC 414 sampling plan to ensure an acceptable Average Quality Level (AQL) for major and minor defects.
A brief review of defect categories & AQL is presented below:
Classification of defects:
Major defects: These defects lead to a malfunction of the finished wound components. Cosmo lot acceptance criteria permits 0.4 AQL for major defects.
Minor defects: These defects do not have a severe effect on the function of wound component. Often they have a negative effect on the visual appearance of the end product.
Cosmo lot acceptance criteria permit 0.4 AQL for minor defects.
Major and Minor Defects

Traceability
A 7 digit batch number written on each label stuck on each Box and allows to get information about:
Material Grade used
Type of core
Granulate/powder batch used
Quantity and date of pressing
References of machines involved in the process of relevant lot.

Outgoing Inspection
Each lot passes through a final outgoing inspection before entering into the Finished Goods. During this inspection, all results (Dimensions, A_L, Power Loss, Peak induction, Mechanical strength etc.) are checked, some samples are controlled and the test report is supplied to the user along with each lot.