My 2 cts: we have a static table with about 2k entries, with just a handful of columns:
- Application + Application ID [the name is redundant, but better for humans reading it]
- Service Offering + Service Offering ID [ditto]
- Weighting
We have a transform of this table, where we change the weighting for those entries for which we have a data source detailing the influence of that application on various business services.
Compliance with ATUM will depend on the categorization of Business Services (in our installation). For us, it doesn't matter, for now.