When do we use Integral Quantity in item master?

Suggestions:
System has provision to set Integral Quantity forItem, which can be processed as integral of number defined.(e.g. 0.001, 10, 1 etc.). It’s an option to specify whether integral quantity or whole lot to be used in transaction. Items can be numbered as Strips, KGS, No. , grams, packs.
We use the integral quantity for transactions when issue for issuing an item can contain one of the following options. 1)Integral Quantity 2)Whole Lot SL 3.Item Lot Packing. It’s the option to specify whether integral quantity or whole lot to be issued.