Deployment options / migration options for S/4 HANA

Hi All,

Need a brief idea on various deployment options for the new customers and migration options for the existing customers for S/4 HANA.

As per the S/4 HANA the deployment options would be Public,Private and in-premise.

Need help on the documentation part where we can have step by step process and the prerequisites for the deployment options and migration options.

Regards,

Charles