logical and physical data

you are in a somewhat unique position in that you are migrating  from Access to an RDBMS of your choice. At what step is a DBMS chosen,  and what is the process?

Your post should include the following details:

• A description of the tasks and mechanisms that allow you to  examine the existing system (a minimum of 3 different tools should be  described)
• A description of conceptual, logical and physical data modeling
• A description of the process and steps in choosing a DBMS