Invoice number ref. in 'Q1' notification

Hi Team,

We are in the configuration of 'Quality notification for customer complaint.Q1'

In this process client has requirement of

1.Reference object as "Invoice number / Billing document number ' along with sales order number, along with Delivery number / item number combination.

2.One Invoice number should consists of more than one delivery numbers.

Please guide how to map above fields with SAP standard or  User exists / Enhancements.

Regards,

Karthik