ATP check with dispatched planned order

Hi  experts,

We are looking  for a solution, regarding ATP check.

Regarding ATP check parameter (OVZ9), there are 4 types in planned order coverage

1.   blanks,

2.   X=  all palnned order,

3.   A=  Firmed up planned order

4.   B=  Completed  planned orders (componets are checked)

However our users want to include dispatched orders only, which are allocated workcenter with CM25, considering line capacity.

   -----> only PLAF-KAPFX ( capacity for planned order dispatched)= "X" is included during ATP check, just firmed up PLAF shoud not be included.   

Does anyone know some exit/BAdi or special solution for it?

Thanks in advance.

BR

Hiro Okamoto