Scenario in GR and MIRO

Hi SAP Guru,

i have a scenario,

PO quantity is 100, GR is done for 95(5 qty is rejected), vendor invoice is done for 100 quantity,

now, requirement is for each material ,  tolerance limits to be defined. for eg,

Material X - PO quantity is 100, GR is done for 95(5 qty - standard rejection), vendor invoice is done for 100, here tolerance is 5%

Material Y - PO quantity is 100, GR is done for 93(7 qty - standard rejection), vendor invoice is done for 100, here tolerance is 7%.

based on material wise, tolerance limits should be fixed in GR and MIRO transaction.

Please explain how to handle to the above scenario.

Thanks

Sudhir Krishna Kumar Singh