approval feature for the miscellaneous transactions

Need to have the ability to have an approval workflow for all miscellaneous transactions. By definition, a miscellaneous transaction, is a non-standard transaction and could be for a significant amount of money. There needs to be an ability to approve it or reject it from a designated approver.

Use Case and Business Need

If a user puts in a miscellaneous transaction to take $100K of material out of Oracle, there should be an associated workflow so the designated account owner or other specified party can go in and approve it via an approval workflow.