Hi Abhinav,
Please read section of "Forecast Reduction" from below wiki page.
6. Forecast Consumption and Reduction in APO System - Supply Chain Management (SCM) - SCN Wiki
I have copied below text from same wiki-
Withdrawal quantity is written to database table /sapapo/dp_head and /sapapo/dp_sched. •/sapapo/dp_head: Create an entry for each location/product/strategy/planning version with unique demand planning index
•/sapapo/dp_sched: Detailed withdrawal quantity of each period. (Note: No order number is logged.)
Field ENTMG – Reduction Quantity; Field ORIMG – Original forecast quantity before reduction As of APO3.1, the withdrawal quantity is also written into the liveCache forecast order data into field ORIGINAL_QUANITY.
EXCEPTION: if descriptive characteristics are used, the withdrawal quantity is ONLY written into the liveCache order data. Nothing is written into the database table.
Hope this will help.
Thank you
Satish Waghmare