Please help me in getting solution of below mentioned issues asap-
1 System should not allow user to take printout before authorization of P.O.
2 After making GR, system should not allow Purchase Manager to make any changes in P.O.
3 if MIGO has been done for today system should not allow user to do MIGO in previous day
Suppose MIGO has been created for 3rd of March user should not be allowed to do MIGO in 2nd march
4 System should allow to fix value limit for P.O. authorization .
Please suggest best solution to resolve above mentioned issues.