how to know that the purchase order link to which inbound delivery ?

Dear Support ,

I am looking for one way which can check which purchase order ( only for trading goods ) link to which inbound delivery ....

Now my way is use the purchase order number as a condiction to check in LIPS table , but i think this is a stupid way , right ?

In fact , i am writing one report which can show all the Open Purchase Order ( Only for trading goods and already created the inbound delivery & shipment costs ) which can do the MIGO without the problems ....

Has any way to check it ?

Many thanks .....

Best Regards

Carlos