Purchaase Order Receipts P4312 - line splitting functionality

Hi,

We would like to have the PO Receipt program split the lines on the PO for partial shipments so that we can track the promised dates for the split shipments accurately in Supply/Demand Inquiry etc.. Basically F4311 shoudl have the split lines like 1.001, 1.002 etc for partials similar to sales side where ship confirm splits the sales order lines.

Is there any way this can be accomplished in JDE? I understand P4312 does this for direct ship orders. But, why is it not designed to function that way for regular purchase orders?

If it needs modification of P4312, please provide some suggestions on the coding change if you have already done one in your environment.