Strategy: Addition to Existing Stock With this strategy, the system prefers to put away stock in storage bins that already contain stock of the relevant product. A prerequisite for addition to existing stock is that sufficient free capacity still exists in the relevant storage bin. If the system cannot find a storage bin with the same product or if the storage bin does not have sufficient free capacity to store additional quants, the system searches for the next empty storage bin.
This strategy violates the FIFO principle. For this reason, you should only use this strategy in situations where you have insufficient space.
The following figure shows an example of addition to existing stock. You want to put away product AA. Since AA is already occupying a storage bin and free capacity is still available, you can add the product to the existing stock.

You have made the following settings for the storage type in Customizing for
EWM
under
You have chosen the
Standard Warehouse
value in the
Storage Behavior
field.
You have chosen the
Addition to Existing Stock/Empty Bin
value in the
Putaway Rules
field.
You have specified in the
Addn.Stock Forbidden
field whether or not you want to allow additions to existing stock.
If you want to allow additions to existing stock, choose “ ” (Addition to existing stock permitted) or “M” (Addition to existing stock via addtn ID in product master). If you choose “M”, you must choose the required value for the
Addit.to Exist.Stock
indicator in the product master.
You have chosen a method in the
Capacity Check
field to activate the capacity check.
You have chosen the value
3
in the
Mixed Storage
field (one HU allowed per bin, in other words, mixed storage is not permitted).