Change Confirmed Qty in Sales Order User exit/ATP User exit

Question

HI
We have a requirement to change the ATP Qty for certain meterials & Order Types  duing sales Order User exit(FORM USEREXIT_MOVE_FIELD_TO_VBEP.? ) or ATP User exit.( ATP...OUT?).
Is this ok to update the XVBEP in FORM USEREXIT_MOVE_FIELD_TO_VBEP of MV45AFZZ ?
Our requirement will be like this, for one order type ZSAL( and for certain Materials)  we need to reserve 4 qty, if any order comes with 10 qty and the confimed qty is only 6( total available stock at present) , then we should only confirm  2 qty for the other order type( For Non ZSAL Order Type), and reserve the 4 QTY for ZSAL Order Type.
If there are multiple schedule lines for an Item, we need to reduce the qty equally( as possible) from all schdule lines.
i.e. date1 qty 4
     date2 qty 6,
in  this case we should confirm  Date1 QTY 2, date2 qty 4, so that the remaining 4 will be reserved for ZSAL Order type.
Whats the Best way to achieve this ?
Edited by: agrud agrud on Sep 8, 2011 4:01 AM

Answer 1

Hi Agrud,
Did you check the possibilities with configuration.If it is not possible with configuration then you can use that exit.Before i used this but only to display not to change any thing.
Regards,
Madhu.