Serial number for traceability

Hi Expert,

I have got a scenario where, I want to map the process in SAP for serial number traceability:

MTS discrete scenario

1. Components received from vendor with his serial number.. whether to use this serial number while doing GR or internal ?

2. While manufacturing the FG will be assigned an internal serial number in the production order.

3. While selling the components received from vendor to customer should I use the same serial number or and internal serial number?

4. If I use internal serial number the how can I track the vendor and customer serial number for warranty purpose.

Also how the tracking can be done ?

How the serializing procedure should be defined in OIS2?

Kindly help me with this scenario as to how I can map this in SAP..

Thanks

Anand