Is Receipt Accounting only option for Accruals? Can you do cost average over period instead?

Is the only out-of-the box ERP/SCM functionality for Accruals predicated on receipts -- like entering a receipt for either period-end or at receipt configuration -- and doing receipts-based accounting? That is, is based-on-receipts the only way to handle accruals with out-of-the box functionality?

For example, as an alternative - is it possible to do accruals with cost averaging over a defined period?