batches can be determined in sales order or delivery or WM transport orders.
it is really an OR, you should not do it in delivery and again in WM, as you may get conflicting values.
the big unknown part is: what is the driver for batch management of certain part and batch determination in your company.
e.g in a chemical industry you may have a reactor to cook 50 tons of a material. batch characteristics may be the color and ph-value.
if you do another production the other day, then the color and ph-value maybe slightly different.
if you do not use batch management, then you find 100 tons in your stock, you do not know when was it produced and you dont know this classification of an individual part out of these 100 tons.
With batch management (and of course putting the batch number on the label) you can lookup in SAP to know exact if this batch has the darker color or the higher ph-value.
if you send samples to your customer, and customer order from batch 1, then you can enter it in the sales order, and from there it is flowing all the way through delivery to the TO, and your guys in the warehouse have to pick this batch and cannot just pick another because it is more convenient for them to pick at a certain shelf only.
if the customer just says: I am okay with ph-value 5,5 - 6, then you have to determine a batch which fulfills these criteria. And as one batch may not be sufficient for the ordered quantity you may even send 2 or 3 batches, then the best place for batch determination is the delivery as here the batch split is done automatically (in the sales order someone would need to do it manually and enter several items).
If the ph-value and color does not play a bigger role, and you only want the oldest batch in a certain storage type to be picked first , then you do your batch determination in WM.
I will not say that the batches do not affect billing. they actually do, as the billing is done at batch line, which can cause in rare cases a small difference in the amount compared to billing at the delivery item line only. Each batch is an extra line in the bill, quantity by price, and the sum of all those results can be differ from a result if you just calculate total quantity by price because of rounding issues, especially if the price is based on alternative units (e.g. stock keeping in KG, billing based on LBS)
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