When you build an assembly a build transaction occurs. Each component used
in the assembly (inventory part or an assembly item nested within the assembly)
is removed from quantity on hand and the newly built assembly item is added to
quantity on hand.
When you adjust quantity on hand for an inventory assembly, an inventory
adjustment transaction occurs. Assembly items are added to quantity on hand,
but the quantity on hand of component inventory parts is unaffected.
Why should I adjust quantities or