voucher match

hi experts

for voucher match there is 2 process

one :-create the po then  receipt the po (grn) then match the voucher from p4314 from which we get the voucher no directly

second in which the po is generation then  receipt the po (grn)  simultaneously  generate  the invoice from f0411

then while matching (voucher match ) the same doc no is used  (what are the set ups required for this process )

thx