How to make the approvals for Quotations(Vendor Responses)?

Hi Experts,

We are using three MOdules of PeopeSoft Supply Chain, i.e 1) eProcurement 2) Purchasing 3) Inventory.

Now when ever we create the RFQ and after Receiving the Responses we need to have approvals from Department Head --> Procurement Manager --> And in the end from Director. We want to have their approvals on Quotations that this is the only one Quotation which is approved for particular Items. Is it possible to have Workflow Approvals on Quotation??

Thanks in Advance