Release Date Calculation in the Purchase Requisition in SAP

Based on the standard SAP example (PR>Quantities/Dates tab>Release data (Press F1),

Processing time   Planned del.   GR processing

       Purchasing         time           time

     |----------|---------------------|--------|

Release       PO                    Delivery    Date

date         date                   date    required

Date required                            :      01.10.2007

GR processing time                    :      2 days (working days)

Planned delivery time                :      10 days (calendar days)

Purchasing dept processing time :      2 days (working days)

For the material to be available on the date it is needed, the purchase 

requisition must be released on 13.09.2007 (requirement date less GR processing 

time, planned delivery time, and purchasing department processing time).