Control Production Order creation in accordance to characteristics value

Hi all,

Production Order are automaticly created in customer order.

Sales department defines the configuration an characteristic value assignment in VA02 transaction.

I would like to control Production Order creation in accordance to characteristics value assignment.

For example, If the characteristique value is A, I do not want the Production Order creation.

Do you know customizing parameter to resolve my issue ? Or will I have to developp a specific program ?

Thanks

Regards

Pierre