Creating GR in MM without ASN

Hi all,

We have implemented MM-SUS scenario, Normally we will create GR in R/3 using inbound delivery, which will be created after doing ASN is SUS.

Now we want to create GR in R/3 without referning to ASN inbound delivery, Is there is possibility to create GR in R/3 without refererence to ASN.?

Is it possible to create with refer to PO or POR in R/3?

Thanks,

Ramu