IP: Best Practice for capturing Key Figure input value in characteristics

Hi Gurus,

we have the requeirement to capture a plannable key figure as a characteristic as well for reporting reasons.

Input in the key figures will be a closed value ist (1 to 5) so no new master data will be created by that in the respective characteristics.

My first guess was an exit characterisic relationship, but obviously it is named "Characteristic Relationship" for a reason, as you cannot not derive values from key figures here.

Any ideas on what would be the best and easiest implementation scenario?

Many thanks in advance,

Tobias