FldInvVendorPercentOnTime is a non-persistent field in InvVendor.
Indicates what percent of the items ordered were delivered on time.
The ordered items must contain the same item, manufacturer, model#, vendor combination as
this invvendor record.
PO.VENDELIVERYDATE is subtracted from MATRECTRANS.ACTUALDATE and if the result is positive,
the product was delivered on time. If the result was negative, it wasnt delivered on time.
If there is more than one receipt for the same poline, the most recent receipt is selected.