Create a workflow variant. You allocate a workflow template for the account assignment approval to this variant. You also specify whether the document release is active and from which amount this is necessary. You can read about how to copy workflow templates within the workflow settings for posting documents and release.
Define your workflow variant.
You can find out which workflow templates are delivered with the standard system by reading the documentation under Financial Accounting in the Accounts Payable document. You can find more information on workflow under cross-application functions in the SAP Business Workflow document.