Merchandise Distribution: Taking existing stock before buying externally

Question

In merchandise distribution,
- for pull, when creating a collective purchase order (WF10),
- for push, when generating follow-on document (WA08),
what are the configurations to make the system take the existing warehouse stock into account before trying to procure from an external vendor?
For example (pull), a store creates an STO for 15 EA of article A, and there are 10 EA of it at DC, so the system create a PO for only 5 EA.
For example (push), the quantity of article A specified in allocation table is 15 EA, and there are 10 EA of it at DC, so the system generates a PO for only 5 EA and an STO for 15 EA.
I'm aware that there is a check box "Dels with Stock Reduction" in the site profile, but even if I check it, the system still does not take the existing stock into account before procure externally.
Any suggestion would be appreciated.
VT

Answer 1

Hello VT, the beauty of these merchandise distribution functions includes:
- To move merchandise more quickly throgh the distribution center.
- To reduce costs for merchandise processing and storage.
None of these functions considers actual DC stock, because they are meant to be used without this stock.
What i´ve seen in companies over the years is that DC stock is sent to the stores or returned to vendor before the implementation of these functions, because one of the mayor goals is to have zero stock of these articles at DC.
Anyway, you can try with creating your own function module for the distribution profile. SAP provides function group WRF4, you can create your own and assign it.
Regards,
Juan Carlos