Enter non accounting data in SAP

Hello experts,

We are implementing SAP Group reporting and we are planning to release financial data directly from ACDOCA or using GRDC. We have a business case where we need to enter non accounting data (analytical data without debit/credit logic) for group repoting purposes only, and we would like to know which are the options available at this point in SAP:

• Enter data using forms in SAC
• Enter data using extension ledgers and statistical accounts in SAP FI
• Enter data directly in group reporting (ACDOCU) if possible...

Please feel free to share any option that can respond to this need,

Thanks in advance!