SAP APO - Forecast consumption withdrawal quantity

Symptom

During forecast reduction, no withdrawal quantity log is updated from reasons of performance. At least for the problem analysis, however, this history could sometimes be useful. The process of forecast  reduction is not repeatable. From reasons of continuous understanding of withdrawal quantities, the history can  be updated during forecast reduction when you activate the attached modification. Together with the goods movements from the ERP you can retrace the reduction operations individually.

Solution

Withdrawal quantities from the  ERP save the information to a  transparent table defined by customer via a USER-EXIT on APO side. The solution don't change standard SAP/APO objects.
Process follow steps:
1. create transparent table ZIRQREDUCT by use transaction SE11
a/ fill name 'ZIRQREDUCT' for database table name and click button
   create
b/ confirm object is in customer name space (ENTER)
c/  Delivery and Maintenance view is displayed :
    - fill Short text . 'Monitor forecast reduction transports'
    - fill Delivery class = 'L'
    - choose Display/maintenance allowed
d/ Go to Fields view and fill as following :
      Field     Key Data element
      DATUM     x   SYDATUM
      UZEIT     x   SYUZEIT
      TRFCCHN   x   /SAPAPO/CIFTRFCCHN
     .INCLUDE       /SAPAPO/CIF_IR_RED
e/ click to icon SAVE
f/ click to button 'Technical setting':
   - fill Data class = 'APPL1'
   - fill Size category = '1' (or another according your meaning)
g/ click icon SAVE
h/ click icon BACK or key 'F3'
i/ activate

2. define insert transported data by USER-EXIT 'APOCF003' to table
  ZIRQREDUCT
a/ fill user-exit 'APOCF003' - function modul
    'EXIT_/SAPAPO/SAPLCIF_IRQ_001' - include 'ZXCIFUSERU05'
    by following source code:
**************************************************
TABLES ZIRQREDUCT.
MOVE CS_CONTROLS-TRFCCHN TO ZIRQREDUCT-TRFCCHN.
MOVE SY-DATUM TO ZIRQREDUCT-DATUM.
MOVE SY-UZEIT TO ZIRQREDUCT-UZEIT.
LOOP AT IT_IR_RED.
  MOVE-CORRESPONDING IT_IR_RED TO ZIRQREDUCT.
  INSERT INTO ZIRQREDUCT VALUES ZIRQREDUCT.
ENDLOOP.
**************************************************
  b/ activate it
  c/ activate user-exit 'APOCF003' using transaction SMOD

Remarks:
1. Be aware one transported withdrawal quantity value will trigger
  insert one row to the table ZIRQREDUCT.
2. You can deactivate  the USER-EXIT for avoid of fill the table
   in future
   (if is not more necessary to monitor the transports).
3. You can maintain/delete the table ZIRQREDUCT by
   use transaction SE16
4. You should test the solution in a DEVELOPMENT/TEST system.

Source
Note 623216 - Log of withdrawal quantity