Tailor-making of SCM SNP Deployment Heuristics – Technical Insights

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Introduction:

• The deployment function in SNP plans the short term distribution of the produced or procured products to the distribution centers.
• It determines “when” and “in what” quantity, inventory and planned receipts can be deployed to distribution centers and VMI accounts.
• There are several deployment strategies that can be used, such as, Fair share, Push deployment and pull-push deployment etc.
• As it is not necessary that all business scenarios fall under these strategies, SAP has given a provision for USER-DEFINED distribution for both Fair share and Push deployments.

Scope:

• Recently, we have adopted this strategy for one of the clients, where in, the business case goes as follows,

          -     The production happens every alternate day. So, Fair share & push deployment also should work both in tandem in alternative days.
                 Meaning, one today, Fair share should be applied and the next day, push deployment should be applied.”

• As there are no documents available about these strategies, I thought of making one, so it will be beneficial for the needy
  ones.

Pre-requisite:

Product Master Setting:  SNP2 Tab-> SNP Deployment Profile

1)     Push Distribution: should be maintained as ‘U’.

2)     Fair Share Distribution: should be maintained as ‘X’.

3) Maintain required category groups for ATD Receipt and ATD Issue in product master, with respective order category groups.

ATD Qty  = ( ATD Receipt - ATD Issue ) is considered as net qty, available for deployment.

One can define order category groups in customizing,

SPRO->Advanced Planning and Optimization->Supply Network Planning (SNP)->Basic Settings->Maintain Category Groups.

Technical Details:

Badi’s to be implemented in the system –

• /SAPAPO/SDP_DISTR  for Push distribution
• /SAPAPO/FS_USER      for Fair share.

          Custom logic has to be incorporated in the following methods of the badis,

• Method: DISTRIBUTE_USER_DEFINED    for Badi /SAPAPO/SDP_DISTR.
• Method: DEPLOY_USER_DEFINED           for Badi /SAPAPO/FS_USER.

             The signature of both methods comprises of most important parameter ‘CT_DEPLOG’ of type Changing.  The custom logic in the badi, should           manipulate with this table parameter data.

• The field ‘CONFMNG’ of CT_DEPLOG is actually refers to the Deployment Confirmed Quantity for a product-location combination of a particular deployed date. One should populate this field with the right quantity, to get desired results. (Don’t mess up with other fields like RDDMDDI).

• The field ‘DMDDI’ of CT_DEPLOG refers to the demand for that product-location in that particular deployed date.

• The changing parameter, ‘CT_ATD’ gives the Available to deploy (ATD) quantity, for deployment.

• The other changing parameter, ‘CT_DEPLSTOCK’ gives the information about the Stock Levels at Destination Locations Converted to the Source.

Log Details:

• Once deployment is run is through /SAPAPO/SNP02, the application log is available in the same T-Code (Display Logs button) or also can be accessed by ‘/SAPAPO/SNPAPLOG’.

• Deployment Stock Transfer gives the information about the deployment orders,that got created in that run.
• Deployment Results (Details) gives the information in more detailed level(like ATD,Roll forward,Deployed Qty, Storage Qty, Target Stk etc).
• To enable the Deployment Results (Details) for USER-DEFINED deployment strategy, as shown in the screenshot, populate the changing table parameter 'CT_ATD' with ATD quantity for each bucket.

Technical aspects of Application Logs:

• All Application logs are stored in various CLUSTER TABLES like BAL_INDX, BALHDR, BALDAT etc. So in order to access, log
  data has to be imported into memory from these clusters. SAP has provided various function modules,
  • BAL_LOG_EXIS
  • BAL_DB_SEARCH
  • BAL_DB_LOAD
  • BAL_FILTER_CREAT
  • BAL_LOG_MSG_READ
  • /SAPAPO/MSDP_LOG_DISPLAY in handling all these application logs.

       For all available function modules information, please follow this link,

           http://help.sap.com/saphelp_nw04/helpdata/en/bb/6811f980ae11d3966f00a0c930660b/content.ht...

References

     SCM 230  Supply Network Planning (APO SNP)