Close the workflow with validation rules for every mapped field. A DPP value should not be published merely because a source system contains it; the team needs a rule for freshness, completeness, source quality, evidence file, update trigger, and withdrawal or correction when the underlying product data changes.
The maintained output should be a DPP mapping register, not a static checklist. It should show each field, source, owner, access level, identifier relationship, carrier or resolver dependency, evidence record, validation status, unresolved legal or standards dependency, and next review trigger.