Was your initial focus in implementing Coupa on optimizing your P2P processes to Automate your requisition creation and PO delivery processes?  Do you consider sending a PO via email as an electronic delivery?  A PO sent via email may have automated your process but has not automated on the supplier side.

Why should you automate supplier processes?  If you can help save time and effort on their side, you will have a great argument to further reduce pricing that you supplier charge.

Where can you optimize your Suppliers Processes?

1. Purchase Order Delivery
• By offering your suppliers option for PO delivery via cXML, your suppliers can have orders directly populated into their order management system, saving them time and eliminating errors.
• See http://integrate.coupa.com/home/supplier-integrations/purchase-orders for more details on PO delivery options
  
2. Invoice Delivery
• Many organizations require suppliers who submit a certain number of invoices per year to do so electronically.  Have you considered such a requirement?  With Coupa, your suppliers have two standard options to do so to minimize data entry by your Accounts Payables personnel: 
1. cXML Invoicing - they can automatically send Invoices to your Coupa environment via an industry standard format
2. PO Flip - suppliers can log onto Coupa Supplier Network (CSN) and "flip" a PO into an invoice.  The CSN is a FREE network
   
• See http://integrate.coupa.com/home/supplier-integrations/invoices for more details on Invoice options
  
3. Supplier Management
• Are you managing supplier information or have you pushed that to suppliers to manage via the Coupa Supplier Network (CSN)?
• Why not consider having your suppliers join the CSN and then they can directly maintain information rather than passing updates to you to maintain.
• For more information, see http://integrate.coupa.com/home/supplier-integrations/coupa-supplier-network.