Hello Srinivas,
User-exit way:
The suggested fms to be used in the include ZXWOCU07of user-exit IWO10009. After this according to your code the changes would take place in these operations when the Order is saved (IW32 or otherwise).
BAdi
BAdiWORKPRDER_UPDATE also can be opted as mentioned above in place of user-exit IWO10009.
Regards
KJogeswaraRao