Product Hierarchy

Hello,

Just have question. were could i see the product hierarchy of my material that been used in my Production Order? In the Material Master basic data there were no Product Hierarchy it was balnk but if we generate the customed report we have the material register product hierarchy. please advise where could i see it. and also in the Productin Order the Qty Unit is PC. and my material used is in KG. but there in our report AUn (Alterbative Unit) register ST, what is the AUn ST? and where could i see the AUn of my material?

Thanks

JJ