Hi
1. The ATP categories comes from the various orders and they are retrieved from the livecache at run time. So the data is not read from any table.
2. You can modify the calculation by implementing the userexit /SAPAPO/POV_COL for product overview. The parameter CT_OUTPUT_TABLE has all the information.
Also refer the following link for other userexits for product overview
http://wiki.sdn.sap.com/wiki/display/SCM/SCM+BADIs
| BADI | Short Description | For Transaction |
|---|---|---|
| /SAPAPO/DM_PO_OP_DA2 | BAdI: Change Opening Period and Calendar | Product Overview, Product View, DS Planning Board, Interactive SDP |
| /SAPAPO/CDPS_SIMCTRL | PP/DS Heuristic: Save/Merge/Delete Own Data | Product Overview, Product View, DS Planning Board |
| /SAPAPO/PPT_TREE_COL | Additional Columns in Navigation Tree | Product Overview, Product View |
| /SAPAPO/RRP_SRC_EXIT | BAdI for Selecting Source of Supply, Creating Planned Orders | Product Overview, Product View |
| /SAPAPO/CULLRTOEXPL | Enhancement for PP/DS PDS Explosion | Product Overview |
| /SAPAPO/POV_COL | POV: BADI for Columns | Product Overview |
| /SAPAPO/RRP_COVPARAM | Time Parameters for Receipts in the Days' Supply Calculation | Product Overview, Product View |