Re: There are two plants

For the plant X(which you don't want to confirm if stock is not available) maintain new combination of checking group nothing but availability check( define new one) + checking rule(A) for this combination in t code OVZ9  TICK the field CHRCK WITH OUT RLT

Where as for the plant Y( which you want to confirm the stock in future date even stock is not available currently) for this combination keep old combination no need to define any new checking group and for this combination in t code OVZ9 DONT TICK the field CHECK WITH OUT RLT

thanks,

Srinu.