Certification 
This component manages individual certifications of devices. If a device functions in accordance with legally prescribed standards, it is certified for a certain period of time and can be installed (or reinstalled).
This component is optional. You require it if
you wish to certify devices individually
a lot does not pass inspection and the devices must be certified individually
Devices that you wish to certify are normally entered in the periodic replacement list via the Periodic Replacement (ISU-DMISPR) component. Devices that have already been removed are not entered in this list, however.
The scope of the inspections is determined by the Inspection Point Group (IS-U-DM-TD-IG) component of the relevant device category. You can then enter inspection results using the Inspection Results Management (IS-U-DM-IS-IS) component. Neither component is required for the sampling procedure.