1 - What is the first technical document about the system (I believe it is the vision document ?!). How to write it, which software to use?
2 - With each step you give, how to do it?
It may seem a little complex, in fact it is, but I would like a bibliographical reference to study, but I would like something more direct, since IT bibliographies turn out to be very complex, so I turn to professionals who work in this area to help directly.