Delivery Date VS GRN Posting Date

Dear All,

I have tried searching the net but could not get exact answer for this, so posting the same. Kindly advice on below.

Delivery date is stored in table EKET and in PO history table EKBE goods receipts posting date can be found in.

Now for the below example how to know exact GRN Date

In EKET the delivery dates & qty are as follows

Schedules Date & QTY

01.03.2013 - 100EA

15.03.2013 - 200EA

25.03.2013 - 300EA

01.04.2013 -100EA

now if the GRN has happened as below how will I link the scheduled date with actual GRN date

      GRN DATE     GRN QTY

on 01.03.2013 -    80  --> how will i link this to the actual scheduled date which is 01.03.2013

on 15.03.2013 -       220  -->Here vendor has sent the 20EA qty which was supposed to be sent on 01.03.2013 along with this consignment.

                                                  How will i identify in system that 20 qty for which GRN has happened is actually supposed to come on 01.03.2013 but was sent later                                                   along with the consignment of 15.03.2013

Similarly if GRN is made for more qty also the excess qty will get updated in future date.

Regards

Manish