Most of DiP-PP dynamic data interfaced in DynaSys is based on the MD04 extraction of the MRP elements. 
For the stock (MRP Element 'WB'), transaction OPPI defines what type of stock is taken into account: Unrestricted Use, Quality Inspection, Blocked, etc. 

Here highlights the main steps of the data flow going through BW.

1. Data acquisition from the 2 ECC systems and from the GBR for some sales master data, is done mainly through Core BW structures, which are shared widely with other applications: sales orders, deliveries, material master, customer master,...

2. The data extracted for the DynaSys interface is then loaded in a 1st level of DSOs, filtered by functional rules: only sales order types reliable for forecasting, horizon limitation to last 3 years, orders not rejected,...

3. Then the data is filtered through a 2nd level of DSOs depending on the perimeter definition: BUs, plants,...

4.Finally, the flat files are created using the APD function of BW.

*Rerfer to - DyS - ECC => DynaSys flat file interface

Archives : 
Files with stock extracted from WP1 are archived under /exploit/DM/archive/DYNASYS/

Use AL11 transaction to reach those files.