Debasis,
I believe the BUM of HRs for your work center is too large in comparison with your .001 MIN to allow for consistent scheduling within APO.
I suggest that you
1. Delete the orders in APO
2. Delete the PDSs in APO
3. Change the work center BUM to Minutes or Seconds
4. Re-create the PDS integration models and re-cif the Production Versions to APO.
5. Re-Cif the orders to APO.
Best Regards,
DB49