For a long time, the mass deletion of quality inspection types from the material master has not been possible within the SAP standard. Transaction QA08 had the possibility to deactivate inspection types, but the complete removal had either to be done by hand or via a custom program.
Fortunately SAP has listened to customers in this case and has provided this requested functionality via the customer connection program.
Here is how to activate the feature:
In SPRO, navigate to Quality Management >> Basic Settings >> Maintain Settings at Client Level
At the bottom in the “Further Settings” section you have to set the checkbox for “QA08 enhancements” to active.
Please check SAP note 1764682 for details and prerequisites (you might e.g. need note 1729128).
When having activated the feature you will now have the possibility in QA08 to mass delete selected inspection types from material masters.
In case you need detailed information you might want to check the documents provided by SAP (search for customer connection program ID 8719). Due to copyright reasons I will not provide any screenshots from these documents.