two non-standard LIV design

I have below two scenario:

(1), we create a framework PO, no GR, only IO, so GR/IR clearing account is debited during IR, so how to clear GR/IR during month end?

any additional configuration we needed compared

with traditional PO-GR-IR process?

(2), fore some materials, we create a PO, then make 30% of PO value payment before GR,

after GR, 50% of PO value is paid, the remaining 20% of PO value is paid during IR, so any additional configuration we needed compared

with traditional PO-GR-IR process?