In Pharma manufacturing, the Assay% calculation of an item is very important. Need a feature to define the Assay% for the specific lot of an Item, and this need to be considered for calculating the actual quantity to be picked by calculating the inventory availability and pick quantity of the lot by considering the Assay% of the item. I have posted another idea in inventory section as "Batch specific Unit of measure quantity" which may be considered along with this idea.