As per standard when a purchase order is created from SOCO or RFx response the status in ERP is "Order". Sometimes purchasers want to review or modify the document after release for authorization.
SRM 7.02 in Classic Scenario offer a easy customizing in order to control the purchase order status in ERP depending on purchasing group and backend.
1) Activate business function SRM_SERVICE_PROC_1


2) In transaction SPRO will appear the following menu.

3) Run "Define Status for Purchase Orders in Back-End System"

4) Fill the table with the values according to your business model and Save. You can select between status "Park" "Hold" and "Save" .

From this moment onwards your Purchase Orders will be created with the status selected in the customizing below.
Hope This Help !
Celeste