release startegy for RFQ

Hi,

what parameter are normally used in release strategy for RFQ in implementations.

(like for PO we can use purchase group, total value etc.)

1. If I see CEKKO there is not much the choice for RFQ.

if there is change in quantity of RFQ, how to handle this as this field is not there in CEKKO.

2. if I add some customer fields in RFQ, can these be considered for release strategy?

3.also my client requirement is that if there are changes in texts, the system should be able to retrigger the release strategy. i donot think it is possible. any work around on this.?

4. if there is cancellation of RFQ, it should follow through approval of competent authority i.e release strategy.

pl give input so that I can take up with client.

Pl guide

rgds