SAP ARIBA : How to get delivery date in ARIBA reporting

[Amous]

Hi all, 

Does anyone know how to get the delivery date provided by the supplier in the ASN in ARIBA REPORTING ?  

My purpose is prepare a table to compare "The need by date of PO line items" with "the delivery date provided by the supplier" and "reception date", to prevent in delays in our P2P process.  

I found a field called "Delivery date" in receipt table but it's not working (blank values) even if dates are already available in PO line items.

Any help on this issue please ! 

SAP Ariba Buying and Invoicing